Digitized by the Internet Archive in 2011 with funding from University of Illinois Urbana-Champaign 'l' I CHAMPA AGRICULTURE http://www.archive.org/details/suggestedinsecti91972univ 1972 Suggested Insecticide Guides CIRCULATE CC UNIVERSITY 0' AGRICUL Insect Control for FIELD CROPS Insects and related pests play a major role in field crop production in Illinois. Although agronomic practices developed during the past century have reduced the importance of many insect pests, a large number of others, including several new invaders, have continued to threaten grain and forage production. Agronomic practices such as certain tillage operations, destruction of crop residues, selection of resistant hybrids, adjust- ment of planting dates, rotation of crops, etc., if used properly, still serve to suppress insect populations. Where possible, these practices continue to be used to provide more balanced insect control. Practical applications of many insect-control tech- niques continue to be thoroughly investigated. Such control methods as insect sterilization, release of insect parasites, attractants for insect baits and traps, propa- gation and dissemination of insect disease organisms, as well as the use of insecticides, are being vigorously pursued. Despite the most optimistic reports, however, it is readily apparent that insecticides will be an impor- tant part of pest management for many years to come. Certain precautionary steps should be taken when handling insecticides. Some of the insecticides sug- gested in the publication can be poisonous to the appli- cator. The farmer is expected to protect himself, his workers, and his family from undue or needless exposure. When using insecticides, apply all the scientific knowledge available to insure that there will be no illegal residue on the marketed crop. Such knowledge is condensed on the label. Read it carefully and follow the instructions. But the label should be recent and not from a container several years old. Do not exceed maximum rates suggested; observe carefully the in- terval between application and harvest; and apply only to crops for which use has been approved. Make a record of the product used, the trade name, the per- centage content of the insecticide, dilution, rate of ap- plication per acre, and the date or dates of application. The chemical names used in these tables may be unfamiliar to you. These names are the common coined chemical names and as such are not capitalized. Trade names are capitalized. In the table of limitations the common names are listed first. Should the trade name be more commonly used, it is in parentheses follow- ing the common name. Throughout the tables of suggestions, however, the common name is used if there is one. In case of question, refer to the table of limitations. These suggestions for the use of insecticides are based on available data. Soil texture, soil pH, rainfall, slope of the field, wind velocity at planting, and other unpredictable factors affect the efficiency. Please report control failures and the circumstances associated with such failures to us. Requested label clearances for a few uses of some insecticides, carriers, and solvents are uncertain for 1972, since many requests have not yet been officially cleared. Anticipating needed changes in labeling, we began modifying these suggested uses a few years ago. We have attempted to anticipate any further label changes in 1972, but an occasional use may still be canceled. Be sure to check with your county exten- sion adviser if you are in doubt about the insecticide you plan to use. We will make announcements of label changes through the news media to keep you up to date. This circular lists only suggested uses of insecti- cides for the control of many Illinois field crop pests, and is not designed to discuss other methods of con- trol. Fact sheets discussing non-chemical control meth- ods, descriptions of specific insects, and their life his- tory and biology are designated as NHE numbers in this circular. This additional information can be ob- tained from the county extension adviser or by writing to the Office of Agricultural Publications, University of Illinois, Urbana, Illinois 61801. Other Suggested Insecticide Guides are: Circular 897 — Insect Control for Commercial Veg- etable Crops and Greenhouse Vegetables; Circular 898 — Insect Control for Livestock and Livestock Barns; Circular 900 — Insect Control by the Homeowner; Circular 1004 — Pest Control in Commercial Fruit Plantings. These suggestions are revised annually by entomol- ogists of the College of Agriculture and the Illinois Xatural History Survey. UNIVERSITY OF ILLINOIS AT URBANA-CHAMPAIGN COLLEGE OF AGRICULTURE In cooperation with ILLINOIS NATURAL HISTORY SURVEY CIRCULAR 899 COOPERATIVE EXTENSION SERVICE Urbana, Illinois, December, 1971 SPECIAL SUGGESTIONS AND MAJOR CHANGES FOR 1972 Federal Laws Registration of pesticides is now the duty of the U.S. Envi- ronmental Protection Agency, not the USDA. The Federal In- secticide, Fungicide, and Rodenticide Act (FIFRA) is being revised. If passed, this Act requires that all pesticides be listed either for general use or for restricted use, and that all persons have a private or commercial license to apply the restricted-use ones. Farmers who apply restricted pesticides even on their own land would need to have a private applicator's license. State Laws Dairy farms. We recommended in 1965 that several chlo- rinated hydrocarbons (DDT, aldrin, heptachlor, etc.) not be used or stored on dairy farms. At that time, slight residues of the products could be found in milk produced where these prod- ucts had been used for some years. The illegal amounts present in milk were not of public-health significance. Most dairy farmers discontinued the use and storage of the several chlorinated-hydrocarbon products on their farms, but a few farmers did not. Occasional milk-residue problems con- tinued to occur, and the milk was barred from the market. In 1971, the Interagency Committee on Pesticides disapproved the use or storage of certain insecticides on dairy farms. The Illinois Department of Public Health has therefore an- nounced that it is illegal for dairymen to apply or store the chlo- rinated-hydrocarbon insecticides — aldrin, chlordane, dieldrin, endrin, lindane, or heptachlor — on their farms, except for use in the farm residence. Previously the use of DDT was pro- hibited except by permit from the Illinois Departments of Agri- culture or Public Health. Methoxychlor and toxaphene can still be used on dairy farms for certain crops. They have a lower rate of storage in the fat of animals and are eliminated more rapidly from the ani- mal's body than the other compounds. To avoid problems with residues in milk, however, dairymen must apply them carefully and exactly according to the directions on the label. Applicator Licensing Revisions Two types of licenses will be issued to those who apply pes- ticides commercially in Illinois. An applicator's license is re- quired for those who determine the pesticide to be used, the rates, importance of wind velocity, crops to be sprayed, etc. The oper- ator's license will be required for those who actually operate the machine but do not make decisions about rates and similar matters. This revision broadens the law to include those who apply landscape and turf pesticides commercially. All governmental employees who apply pesticides must also be licensed. For details, write to the Department of Agriculture, Division of Plant Industry, Springfield, Illinois 62700. Changes in Suggestions for 1972 Corn insect complex in soil. Many farms in Illinois have no major corn-insect problem, and a seed treatment of diazinon at planting time is sufficient. This will protect against attack by seed-corn beetles and seed-corn maggots during germination. Fewest seeding-rate problems will occur when the correct amount of diazinon seed-treater is premixed with the seed just before it is put in the planter box. If other insect problems are anticipated, the following insec- ticides— applied as a 7-inch band on the soil surface at plant- ing — may be helpful : Dasanit 1 pound actual per acre diazinon U/2 pounds actual per acre Dyfonate 1 pound actual per acre phorate (Thimet) 1 pound actual per acre prophos (Mocap or Jolt) ... .1 pound actual per acre We do not recommend any planting-time insecticide applica- tions for the control of black cutworms. Apply baits or sprays at the first signs of a black-cutworm infestation. Early treatment is imperative. Dyfonate controls garden symphlans. Other insecticides used for rootworm control may also give practical protection. Rootworm complex. Three species of corn rootworms — northern, southern, and western — are present each year in Illi- nois. The southern corn rootworm adults migrate into Illinois each year. The northern and western corn rootworms over- winter as eggs in the soil of Illinois cornfields. The adults feed on corn silks during August and September when they lay eggs in the soil. Fields that had 5 or more of these rootworm beetles per cornstalk in August, 1971, may have a severe rootworm problem in 1972. Fields with fewer beetles may have a light to severe infestation in 1972. If a very severe rootworm infestation is anticipated, 1 pound of carbofuran (Furadan) per acre will provide the best results. If light to moderately severe infestations are expected, any one of the following insecticides will provide practical control. Pounds actual per acre (40-inch rows; check label for other row spaces) Planting time Cultivation Bux 1 1 carbofuran (Furadan) y$ Ya Dasanit 1 1 Dyfonate 1 1 phorate (Thimet) 1 1 prophos (Mocap or Jolt) 1 If you plan to use insecticides for cultivation-time treat- ments, use a seed-treater at planting. Piles of granules may accumulate when you stop your planter-applicator. To avoid loss of livestock and wildlife, these piles should be scattered and covered. If you see granules in the row, drag a chain or use a cover wheel behind the press wheel to completely cover granules. European corn borer. Phorate has been labeled for the control of first-generation corn borers. We are not encouraging its use for corn-borer control, but leftover supplies of phorate from corn-rootworm control can be used for this purpose rather than to store them over the winter, when they are accident haz- ards. As we read the regulation, phorate can be used at planting, with one additional application — but not within 30 days of graz- ing or cutting for forage. Either a cultivation treatment for rootworms or a corn-borer application later would be acceptable, but not both. In our experience, % to 1 pound per acre of carbofuran at corn-planting time will not give enough control of first-genera- tion corn borers to measure; much higher but illegal dosages will control first-generation corn borers to some extent. Stored-Grain Insects Resistance of the Indian meal moth to malathion has been confirmed in Illinois. The malathion wheat-dust protectant for- mulation has been dropped from the 1972 suggested recommen- dations. Unsatisfactory control is expected to occur in about 10 to 20 percent of the cases this year and will increase next year. However, malathion is effectively controlling the other stored- grain insects (about 12 important ones). Substitute pyrethrin plus piperonyl butoxide spray for ma- lathion in controlling Indian meal moth on stored grains. Re- peated monthly treatments will probably be needed. Although not registered for use, dichlorvos (Vapona) resin strips in ex- periments have controlled infestations of Indian meal moths. Clover and alfalfa pests. Beneficial insects often develop in clover and alfalfa fields. When the hay crop is cut, these benefi- cial insects move to other crops in search of insects as their food. Lady beetles, flower flies, aphis lions, big-eyed bugs, insidious flower bugs, and others that feed on other insects are commonly found in hay crop fields. If your hay supply is critical, follow the recommendations for insecticide use on these crops. If you can afford minor yield losses, manipulate cutting dates if pos- sible to avoid insecticide application. It is better to use insecti- cides, however, than to allow the pest to kill the crop. \ 5 LIMITATIONS IN DAYS BETWEEN APPLICATION OF THE INSECTICIDE AND HARVEST OF THE CROP AND OTHER RESTRICTIONS ON THE USE OF INSECTICIDES FOR FIELD CROP INSECT CONTROL (Blanks in the table denote that the material is not suggested for that specific use in Illinois) soil Field corn Grain Ensilage Stover Sorghu m Forage crops Seed and Alfalfa Clover Pasture Seed azinphosmethyl (Guthion)1 16.E 16,t-: 16.E Bux A carbaryl (Sevin) 0 0 0 21 0 0 0 carbofuran (Furadan)1 A Dasanit A demeton (Systox)1 21, E 21, E 21, E diazinon A 10 10 7 7 7 7 Dyfonate1 A Gardona 5 5 5 Imidan 7,E malathion 5 5 5 7 0 0 0 0 methoxychlor 7 7 7 7 mevinphos (Phosdrin) 3 naled (Dibrom) 4 4 4 methyl-parathion1 15 15 15 15 parathion1 phorate (Thimet)1 A B B B prophos (Mocap or Jolt) A toxaphene A C C D trichlorfon (Dylox) 28,H 28,H 28,H Barley Oats Rye ( Wheat Soybeans Grain Straw Grair i Straw Grain Straw jrain Straw Grain Forage azinphosmethyl (Guthion)1 21 D carbaryl (Sevin) 0 0 carbophenothion (Trithion)1 7 D demeton (Systox)1 45.1" 21, F 45,F 21,F 45, F 21.1 disulfoton (Di-Syston)1 G malathion 7 7 7 7 7 7 7 7 0 0 parathion1 15 15 15 15 phorate (Thimet)1 G toxaphene A D A D A D \ D 21 D trichlorfon (Dylox) 21 3 21 3 21 3 1 Sprays to be applied only by experienced operators wearing proper protective clothing. A. Xo specific restriction when used as recommended. B. Do not apply after tasseling. C. Do not feed treated forage to dairy animals. Do not feed sprayed forage or granular-treated corn silage to livestock fattening for slaughter nor granular-treated stover within 28 days of slaughter. D. Do not feed treated forage to dairy animals, livestock fatten- ing for slaughter, or poultry. E. Once per cutting. F. Apply no more than twice per season with at least 14 days be- tween applications. G. Do not graze treated wheat. II. Once only per season when plants arc 3-12 inches tall. TOXICITY AND PERSISTENCY RATINGS FOR INSECTICIDES1 Toxicity to Per- sistency as a residue Insecticide Toxicity to Per- Insecticide Warm- blooded animals Fish Honey- bees2 Warm- blooded animals Fish Hone) bees2 sistency as a residue azinphosmethyl .... carbaryl carbophenothion demeton 1 4 1 1 6 3 2 1 3 1 1 3 3 2 2 1 3 4 2 3 3 1 3 methoxychlor methyl parathion . . naled parathion phorate toxaphene trichlorfon 6 1 3 1 1 3 4 1 6 2 2 1 6 4 1 5 1 3 5 4 4 6 6 6 diazinon 3 4 ( jardona Imidan malathion 6 3 5 1 5 \ rating of 1 indicates high toxicity or persistence of residue; a rating of 6 indicates low toxicity (relatively safe) and little persistency. 2 When applied at the optimum time to avoid bee-kill. FIELD CORN Insect Time of attack Insecticide1 Lb. active ingredient per acre Placement Timing of application (See table of limitations) Corn rootworms2 (NHE-26) June-August Bux carbofuran Dasanit Dyfonate phorate prophos 1 Soil surface % 1 1 1 1 As 7-inch band ahead of planter press wheel. For severe infestations, 1 pound of carbofuran is most effective. Basal treatments during cultivation with Bux, carbofuran, Dasanit, Dyfonate or phor- ate are effective. Seed-corn maggot Seed-corn beetle At germination diazinon See page 3 On seed For band treatment, see wireworm. Wireworm (NHE-43) White grub (NHE-23) Grape colaspis (NHE-25) May-July May-October May-July Wireworms may be partially controlled by Dasanit prophos. Along with these five, carbofuran will give grubs. For rates, see page 2. diazinon, Dyfonate, phorate (Thimet), or partial control of grape colaspis and white Sod webworm (NHE-42) May-June carbaryl 1 At base of plant At time of initial attack. Cutworms (NHE-38) May- June carbaryl bait 1 Broadcast carbaryl plus 1 to 2 molasses or Tractum Direct at base of plant trichlorfon 1 At base of plant When cutting starts. Repeat if needed. Same as above. Same as above. One application only permitted. Billbugs (NHE-37) May-June carbaryl diazinon 1 1 At base of plant As needed. Garden symphylan May-July Dyfonate 1 in row at planting 2 broadcast before planting If suspected as a problem, use dyfonate for soil insect control. Grasshopper (NHE-74) June- September carbaryl toxaphene Over row as spray As needed. For ensilage corn use car- baryl, diazinon, or malathion. Flea beetle (NHE-36) May-June carbaryl toxaphene 3A Over row as spray When damage becomes apparent on small corn. Armyworm (NHE-21) May-June Late July- August carbaryl malathion toxaphene trichlorfon 1H 1 IK 1 Over row At first migration or when damage first as spray becomes apparent. toxaphene IH Broadcast over infested area When leaves below ear level are consumed and worms eating leaves above ear level. Fall armyworm (NHE-34) June; August- September carbaryl diazinon Gardona toxaphene iy2 i In whorls Granules preferred when worms deep in whorl. If worms are small and out on leaves, sprays will be satisfactory. When silking (see earworm). Chinch bug (NHE-35) June-August carbaryl 1 Spray at base At beginning of migration. If applied of plant in adjacent grain, do not harvest small grain. Thrips (NHE-39) June carbaryl On foliage When severe wilting and discoloration are as spray noticed. Corn leaf aphid (NHE-29) diazinon granules 1 phorate granules 1 In whorl Just before tasseling when aphids are ap- pearing on individual plants. Preventive treatment. Not after tassel emerges. malathion diazinon As a foliage Apply during late whorl to early tassel spray when 50% of the plants have light to mod- erate infestations. FIELD CORN (continued) Insect Time of attack Insecticide1 i Lb. active ngredient per acre Placement Timing of application (See table of limitations) Corn rootworm adults Late July, early August carbaryl malathion diazinon Overall spray or directed towards silk When silking is not over 50% and there are more than an average of 5 beetles per ear. Only to protect pollination. Corn borer, first generation June-July carbaryl granules diazinon granules m On upper % of plant and into whorl When tassel ratio is 30 to 50, and 75% or more plants show recent borer feeding in whorl. Corn borer, second generation Mid August carbaryl diazinon As for first generation From ear upward At first hatch when there are 1 or more egg masses per plant. Corn earworm (NHE-33) July-August carbaryl Gardona m m Spray ear zone 2 applications at 3- to 5-day intervals, starting at 30-50% silk. 25 gal. of finished spray per acre. 1 See page 3 for insecticide restrictions. ' Rotations will control roolwonns. To prevent damage from western corn rootworms, rotate corn with some other crop annually. To prevent damage from northern corn rootworms, do not grow corn more than 2 years consecutively in the same field. SOYBEANS Insect Time of attack Insecticide1 Lb. active ingredient per acre Placement Timing of application (See table of limitations) Bean leaf beetle (NHE-67) May-June, August carbaryl2 toxaphene3 1 1H On foliage When leaf feeding becomes severe, but before plants killed or pods eaten. Clover root curculio adult (NHE-71) May-June carbaryl2 toxaphene3 1 On marginal rows When clover is plowed, beetles migrate to adjacent beans. Grasshopper (NHE-74) June- September carbaryl2 toxaphene3 VA On foliage When migration from adjacent crops begins. Flea beetle May-June carbaryl2 toxaphene3 1 \y2 On foliage Seedlings usually attacked. Treat when needed. Green clover worm (NHE-75) and webworm (NHE-42) August carbaryl2 malathion i i On foliage When damage appears and small worms are numerous between blossom and pod fill. Mites June-August carbophenothion4 azinphosmethyl4 On foliage As needed on field margins and entire field. Stink bugs July and August carbaryl2 malathion 1 1 To foliage As needed but when stink bugs are numerous. Thrips Leafhoppers June-August malathion 1 To foliage As needed. 1 See page 3 for insecticide restrictions on soybeans. 2 Carbaryl should not be used at more than 1 lb. per acre. Higher rates may damage plants. 3 For use on dairy farms only when alternate material is not available and when insect emergency exists. Do not apply as foliage sprays or dusts to or adjacent to dairy pasture, hay, or forage crops. 'To be applied only by experienced operators or those wearing protective clothing. CLOVER AND ALFALFA Insect Time of attack Insecticide1 Lb. active ingredient per acre Placement Timing of application2 (See table of limitations) Alfalfa weevil (NHE-89) March-June Imidan azinphosmethyl3- 4 methyl parathion3 1 malathion5 with methoxychlor diazinon5 with methoxychlor 1 malathion6 IK methyl parathion3 azinphosmethyl3 malathion5 and methoxychlor diazinon5 and methoxychlor y2 1 On foliage When 25% of the tips are being skeleton- ized treat immediately; two treatments may be necessary on first cutting; re- growth following first cutting may need protection. By ground, use a minimum of 20 gal. of finished spray per acre (10 gal. on stubble) or 4 gal. by air. Do not apply during bloom. Instead cut and remove hay. Imidan On foliage Sprays in November or early March sug- gested to kill adults and prevent egg laying. This also spares the parasites that later will attack the larvae. Apply after two or three warm days (above 45°F.). Proven method in southern % to M of Illinois. Not yet tried in northern Illinois. This timing preferred over later spring treatments. Clover leaf weevil (NHE-12) March- April malathion 1 On foliage When larvae are numerous and damage is noticeable, usually early to mid-April. Spittlebug (NHE-13) Late April, early May methoxychlor % On foliage When bugs begin to hatch and tiny spit- tle masses are found in crowns of plants. Aphid (NHE-14andl9) April-May demeton3 diazinon malathion 1 On foliage When aphids are becoming abundant and lady beetle larvae and adults, parasites, and disease are slight. Leafhopper (NHE-22) Early July carbaryl methoxychlor 1 1 On foliage When second-growth alfalfa is 1 to 6 inches high, or as needed. Garden webworm (NHE-42) July-August carbaryl toxaphene7 1 1^ On foliage When first damage appears. Use toxa- phene only on new fall seedlings Cutworm (NHE-77) April-June carbaryl 1H On foliage Cut, remove hay, and spray immediately. Armyworm (NHE-21) May-June, September carbaryl malathion m 1 On foliage Only when grasses are abundant. Seed crop insects July-August toxaphene7 ih On foliage No later than 10% bloom. Grasshopper June- carbaryl % (NHE-74) September diazinon y* malathion 1 naled M On foliage When grasshoppers are small and before damage is severe. When bees are fre- quenting bloom, do not apply carbaryl. Apply others only late in day. Sweet clover weevil (NHE-15) April-May toxaphene7 1H On foliage When 50% of foliage has been eaten. New seedlings only. all herbicides out of equipment. During pollination, apply very late in day. those wearing protective clothing. 1 See page 3 for insecticide restrictions. 2 Before applying insecticides, be certain to clean 3 To be applied only by experienced operators or 'Water temperature should be above 55 °F. 6 Use no less than these amounts. "Use only when air temperature is above 60° F. 7 Not for use on dairy farms. Do not apply as foliage sprays or dusts to fields adjacent to dairy pasture, hay, or forage crops. GRAIN SORGHUM Insect Time of attack Insecticide1 Lb. active ingredient per acre Placement Timing of application (See table of limitations) Webworm After heads form carbaryl diazinon malathion 1H 0.9 On grain head Before population reaches 5 larvae per head. Pest usually bad in wet seasons on late planted grain. Corn leaf aphid All season malathion 0.9 Broadcast Degree of infestation to warrant treat- ment not determined. Corn earworm After heads form carbaryl W2 Direct at head or broadcast When 5 to 10 percent of heads are first infested by small worms. Midge August- September diazinon t 1 Direct at head Late plantings only within 4 days of 90% head emergence. 1 See page 3 for insecticide restrictions. STORED GRAIN (Corn, Wheat, and Oats) 1,2 Time of Insecticide Suggestions Insect attack and dilution3 Dosage Placement (See table of limitations) Angoumois grain April-October malathion 57% Apply to runoff Spray surface Plant tight husk varieties. Store as shelled moth (earcorn) (Southern )4 of E.C., 3 oz. per and sides corn to avoid all but surface damage by (NHE-62) Illinois only). gal. water May 1 and August 1 angoumois moth. Meal moths and April-October malathion 57% 2 gal. per 1,000 Spray grain Clean and spray bin with 1.5% malathion surface infestations E.C., 3 oz. per sq. ft. surface, to runoff before storage. Store only clean only (NHE-63) gal. water4 bin walls, and ceiling dry grain. Apply treatments June 1 or July 1 and August 15. pyrethrin 6% 2 gal. per 1,000 Spray Apply at storage and monthly thereafter + sq. ft. grain during summer months. piperonyl surface butoxide 60% E.C., 414 oz. per gal. water General Internal and ex- April-October malathion 57% 3-5 gal. per 1,000 Spray Clean and spray bin with 15% malathion ternal feeders E.C., 1 pt. per bu. uniformly as to runoff before storage. Store only clean (NHE-64, 65) 3-5 gal. water6 grain is dry grain. Spray surface grain at storage Rice and granary binned and again about August 15. weevils Flat grain beetle liquid fumigant6 3-5 gal. per 1,000 On surface; Clean and spray bin with 1.5% malathion Saw-toothed bu. repeat if nec- to runoff before storage. Store only clean grain beetle essary dry grain. Apply in late July and Sep- Rusty grain beetle tember in the southern half of Illinois; apply in mid-August in the northern half Foreign grain beetle 73 mixture6 As directed On surface of Illinois. Use surface treatment of Cadelle beetle phostoxin6 180 tablets Tablets malathion as recommended for meal Flour beetle per 1,000 bu. 2 feet apart moths. 1 Corn need not be treated at harvest with a protectant unless it is to be carried over the following summer. 2 Wheat and oats should be treated if they are to be held for one month or more in storage after harvest. 'Use only the grade of malathion labeled for use on stored grain. Malathion vaporizes and is lost rapidly when grain is heat-dried. 1 On some farms, Indian meal moth resistance to malathion results in failure. Use pyrethrin instead. ' Malathion dust no longer suggested because of greater likelihood of failure to control Indian meal moth. 6 Use with extreme caution. Apply only under calm conditions and when grain temperature is 70°F. or above. Grain should be 8 inches below the lip of the bin and should be leveled before fumigating. SMALL GRAINS Insect Time of attack Insecticide1 Lb. active ingredient per acre Placement Timing of application (See table of limitations) Grasshopper (NHE-74) June-August toxaphene2 1M On entire plant Control early while grasshoppers are small. Chinch bug (NHE-35) June-July carbaryl 1 At base of stalk After grain harvest, treat strip in stubble to protect corn from migrating bugs. Armyworm (NHE-21) May-June malathion toxaphene2 trichlorfon On foliage When worms are still small and before damage is done. Do not use malathion on barley or trichlorfon on rye. Greenbug English grain aphid May-June demeton3 parathion3 On foliage When needed. Hessian fly Sept.-October; April-May disulfoton phorate y* In drill row Use granules in a grass-seeder for suscep- tible varieties planted early. Do not graze. 1 See page 3 for insecticide restrictions. J For use on dairy farms only when alternate material is not available and when insect emergency exists. Do not apply as foliage sprays or dusts to or adjacent to dairy pasture, hay, or forage crops. 3 To be applied only by experienced operators or those wearing protective clothing. FOR YOUR PROTECTION: Always handle insecticides with respect. The persons most likely to suffer ill effects from insecticides are the applicator and his family. Ac- cidents and careless, needless overexposure can be avoided. Here are a few rules that if followed will prevent most insecticide accidents: 1. Wear rubber gloves when handling insecticide concentrates. 2. Do not smoke while handling or using insecticides. 3. Keep your face turned to one side when opening, pouring from, or emptying insecticide con- tainers. 4. Leave unused insecticides in their original containers with the labels on them. 5. Store insecticides out of reach of children, irresponsible persons, or animals ; store prefer- ably in a locked building. Do not store near livestock feeds. Better yet, buy no more pesticide than you will use. This eliminates a pesticide storage and disposal problem. 6. Wash out and bury, burn, or haul to the refuse dump all empty insecticide containers. 7. Do not put the water-supply hose directly into the spray tank. 8. Do not blow out clogged nozzles or spray lines with your mouth. 9. Wash with soap and water exposed parts of body and clothes contaminated with insecticides. 10. Do not leave puddles of spray on impervious surfaces. 11. Do not apply to fish-bearing or other water supplies. 12. Do not apply insecticides, except in an emergency, to areas with abundant wildlife. 13. Do not apply insecticides near dug wells or cisterns. 14. Do not spray or dust when weather conditions favor drift. 15. Observe all precautions listed on the label. 16. To avoid bee kill, apply insecticides after bee activity has been completed for the day ; use the least toxic materials. Warn beekeepers that you are applying insecticides. Issued in furtherance of Cooperative Extension Work, Acts of May 8 and June 30, 1914, in cooperation with the U.S. Department of Agriculture. JOHN B. CLAAR, Director, Cooperative Extension Service, University of Illinois at Urbana-Champaign. 20M— 1 2-71 — 20029 UNIVERSITY OF ILLINOIS-URBANA Q630.7IL6C C005 CIRCULAR URBANA, ILL 899 REV. 1972 3 0112 019541108