Historic, archived document Do not assume content reflects current scientific knowledge, policies, or practices. 17¢7V0L. 23 NO. 5 February 2, 1973 B2C7f tiny << Cooperative EConomic Insect Report Issued by PLANT PROTECTION AND QUARANTINE PROGRAMS ANIMAL AND PLANT HEALTH INSPECTION SERVICE ES DEPARTMENT OF AGRIGULTURE ANIMAL AND PLANT HEALTH INSPECTION SERVICE PLANT PROTECTION AND QUARANTINE PROGRAMS PEST SURVEY AND TECHNICAL SUPPORT STAFF The Cooperative Economic Insect Report is issued weekly as a Service to American Agriculture. Its contents are compiled from information supplied by cooperating State, Federal, and industrial entomologists and other agricultural workers. In releasing this material the Service serves as a Clearing house and does not assume responsibility for ac- curacy of the material. All reports and inquiries pertaining to this release, including the mailing list, should be sent to: CEIR Pest Survey and Technical Support Staff Plant Protection and Quarantine Programs Animal and Plant Health Inspection Service United States Department of Agriculture Federal Center Building Hyattsville, Maryland 20782 Volume 23 February 2, 1973 Number 5 COOPERATIVE ECONOMIC INSECT REPORT HIGHLIGHTS Current Conditions Barley yellow dwarf virus, transmitted by CORN LEAF APHID and ENGLISH GRAIN APHID, may be major small grain problem in Alabama next few months. (p. 27). ALFALFA WEEVIL active in Texas, Oklahoma, and Missouri. (p. 27). Detection New State records include a SCARAB from North Carolina (p. 28) and a PTEROMALID WASP from South Carolina. (p. 28). Special Reports_ Survey Methods. Selected References 1971. Part XXXVI. (pp. 29-47). Golden Nematode Quarantines. Map. Centerfold. Reports in this issue are for week ending January 26 unless other- wise indicated. =O = CONTENTS Special Insects of Regional Significance....... ain. Ans ate kone ee Insects Affecting Se LT Gres. Sok cach ee oe 27 General Vegetables....%....27 Turf, Pastures, Rangeland.27 Man’ and: Animars' i. Sci. tan ied Forage LegumeS........eees 27 Beneficial Insects...... and. Chambers, .D2°L- 1971. A fluid larval medium for rearing the melon fly. J. Econ. ‘Ent. 64(5) : 1221-1223. Schwartz, J. ls and Lyon,.R2 LL. 1971. Contach toxic tty poletrve insecticides to California oakworm reared on an artificial diet. J. Econ. Ent. 64(1):146-148. Shanks». C,. »H.» Jr,, and, Finnigan, Bz.¥,. 1971. Development yor thoracic legs on black vine weevil larvae fed on a powdered milk diet. Ent. Soc. Amer. Ann. 64(6) :1340-1341. Shaver, T. N. and Raulston, J. R. 1971. A soybean-wheat germ diet for rearing the tobacco budworm. Ent. Soc. Amer. Ann. 64(5): 1077-1079. EAS Siddig, M. A. and Elbadry, E. A. 1971. Biology of the spider mite Eutetranychus sudanicus. Ent. Soc. Amer. Ann. 64(4) :806-809. Singh, Z. and Howe, W. L. 1971. Feeding, longevity, and fecundity of the adult western corn rootworm fed artificial diets. Js oheon« “Ent, 64¢5).: 1186-1137. Sonenshine, D. E. 1971. Mass rearing of radioisotope-tagged larval ticks for ecological investigations. J. Econ. Ent. 64(6): 1423-1429. Soto, P. E. and Laxminarayana, K. 1971. A method for rearing the sorghum shoot fly. J. Econ. Ent. 64(2):553. Sparks, A. N., Wiseman, B. R., and McMillian, W. W. 1971. Production of corn earworms on several hosts in field cages. J. Econ. Ent. 64(2):540-541. Spencer, N. R. 1971. Sterilization of insect diet by gamma irradiation. J. Econ. Ent. 64(3):753-754. Srivastava, P. N. and Auclair, J. L. 1971. An improved chemically defined diet for the pea aphid, Acyrthosiphon pisum. Ent, Soc. Amer. Ann. 64(2):474-478. Srivastava, P. N. and Auclair, J. L. 1971. Influence of sucrose concentration on diet uptake and performance by the pea aphid, Acyrthosiphon pisum., Ent. Soc. Amer. Ann. 64(3):739- 743. Stadler, E. 1971. An improved mass-rearing method of the carrot rust fly, Psila rosae (Diptera: Psilidae). Canad. Ent. 103 (7) :1033-1038. Standlea, P. P. 1971. Mass rearing parasite-free green peach aphids in the greenhouse. J. Econ. Ent. 64(3):775-776. Standlea, P. P. and Enns, W. R. 1971. A flexible multiple-cage ventilation system for use with sleeved isolation cages. de ppeonsabntu164 (5) Schwartz,, Pi: : H.3.,Townshend ;..B.4G.,;) and; Jester, C. W. 1971. Effect of color and. design: of traps on captures of Japanese beetles and bumblebees. J. Econ. Ent. 64(2):430- 432. Hamilton, D. W., Schwartz, P. H.,jtownshend,+8. G.s audiJesiter, C. W. 1971. Traps reduce an isolated infestation of Japanese beetle. J. Econ. Ent. 64(1):150-153. Hansens, E. J., Bosler, E. M., and. Robinson, J. W. 19717 Use” o£ traps for study and control of saltmarsh greenhead flies. J. Econ. Ent. 64(6) :1481-1486. Hardee’, D. D., Lindig, ©: H., and Davich, T. B..7 see under Attractants. Harris, E. J., Nakagawa, S., and Urago, 1... 1971, (sticky trapsetor detection and survey of three tephritids. J. Econ. Ent. 64(1) :62-65. Hartstack; A. W.., Jr...,) Hollingsworth, J. P.,.Radgway, R. Lee, and Hunt, H. H. 1971. Determination of trap spacings required to control an insect population. J. Econ. Ent. 64(5):1090- 1100. Howland,: Aw F.),0 Henneberry,. T; Ji. ,. and. Wolf, W. W. 1971... Compari-= of cabbage looper and other moth species caught in blacklight traps baited or unbaited with unmated females. J. Econ. Ent. 64(4) :977-978. - 40 - Hudson, J. E. 1971. Assessment of methoxy-DDT as a residual spray against mosquitoes in verandah-trap huts at Magugu, Tanzania. Bul. Ent. Res. 60(4) :615-630. Hudson, J. E. 1971. Trials of residual sprays of Mobam and carbaryl against mosquitoes in verandah-trap huts at Taveta, Kenya. Bul. Ent. Res. 62(1):267-273. Hudson, J. E. and Esozed, S. 1971. The effects of smoke from mosquito coils on Anopheles gambiae Giles and Mansonia uniformis (Theo.) in verandah-trap huts at Magugu, Tanzania, Bul. Ent. Res. 62(1):247-265. Khamala, C. P. M. 1971. Ecological distribution of East African Culicoides Latreille (Dipt., Ceratopogonidae) as shown by light-traps. Bul. Ent. Res. 60(4) :549-557. Killinen, R. G. and Ost, R. W. 1971. Pheromone-maze trap for cabbage looper moths. J. Econ. Ent. 64(1):310-311. Lewis, W. J., Snow, J. W., and Jones, R. L. See under Attractants. Lopez-D., F., Steiner, L. F., and Holbrook, F. R. 1971. A new yeast hydrolysate-borax bait for trapping the Caribbean fruit fly. J. Econ. Ent. 64(6) :1541-1543. Meson We ie de, . and Sublette, J. E. 1971. Collecting: Ohio River Basin chironomidae (Diptera) with a floating sticky trap. Canad. Ent. 103(3) :397-404. Nakagawa, S., Chambers, D. L., Urago, T., and Cunningham, R. T. 1971. Trap-lure combinations for surveys of Mediterranean Pieter tes iil Hawa 1 A... 1).5 HCony, Ent .°64€5)2 1213-1213. Nakagawa, S.;, Cunningham, R. T., and Urago, T. 1971. The repellent effect of high trimedlure concentrations in plastic traps to Mediterranean fruit fly in Hawaii. J. Econ. Ent. 64(3) :762-763. Nemec, S. J. 1971. Effects of lunar phases on light-trap col- lections and populations of bollworm moths. J. Econ. Ent. 64 (4) :860-864. Plaut, H. N. See under Attractants. Boden. hae hay, -L., Hopkins,*A:-R:,~- and Taft, H. -M. LOVL. Comparison of attraction of wing traps and cotton trap plots baited with male boll weevils for overwintered weevils. Ent. Soc. Amer. Ann. 64(2):530-531. HedenaeSa non Raye lis, Latt, H. M.,.- and “Hopkins, A. R. 1971. Wing traps baited with male boll weevils for determining spring emergence of overwintered weevils and subsequent infestations iH -Gotton, J. Econ. Ent. 64(1):107-110: Between hoy Rice. Ks Eo, Reynolds, H. T., and Shorey, H. H. 1971. Seasonal influence and effect of trap location on catches of pink bollworm males in sticky traps baited with hexalure. Ent. Soc. Amer. Ann. 64(1):102-105. = 4 = Shaunak, K. K. and Pitre, H. N. 1971. Seasonal alate aphid col- lections in yellow pan traps in northeastern Mississippi: possible relationship to maize dwarf mosaic disease. J. Econ. Ent. 64(5):1105-1109. Smith, J. S., Jr., and Cantelo, W. W. 1971. Single vs. multilamp blacklight insect trap collections of tobacco hornworm moths. J. Econ. Ent. 64(1):19-20. White, L. D. and Hutt, R. B. 1971. Codling moth catches in sex and light traps after exposure to 0, 25, or 40 krad of gamma irradiation. J. Econ. Ent. 64(5):1249-1250. Wolf, W. W., Kishaba, A. N., and Toba, H. H. 1971. Proposed method for determining density of traps required to reduce an insect population. J. Econ. Ent. 64(4) :872-877. Wong, fT. bP. ¥..,, Cleveland, MW. L.; Ralston, DA. j and Havis ha G. 1971. Virgin female traps to determine activity and popu- lations of red-banded leaf roller. J. Econ. Ent. 64(1):132- 134, ATTRACTANTS AliNiazee, M. T. and Stafford, E. M. 1971. Evidence of a sex pheromone in the omnivorous leaf roller, Platynota stultana (Lepidoptera: Tortricidae): laboratory and field testing of male attraction to virgin females. Ent. Soc. Amer. Ann. 64(6) :1330-1335. August, C. J. 1971. The role of male and female pheromones in the mating behaviour of Tenebrio molitor. J. Insect Physiol. 17 (4) :739-751. Batdwin, Wek. 5 «Knight, A...G., and, lynn, "KK. -K.. P97). AUsex pheromone in the insect Rhodnius prolixus (Hemiptera: Reduviidae). Canad. Ent. 103(1) :18-22 Barber, I. A. and Coauthors. 1971. Attractant for the coconut rhinoceros beetle. J. Econ. Ent. 64(5):1041-1044. Beroza, M., Bier! , B.'Al; Kniptinge; EL F2, and *lardat ae Gas- 1971. The activity of the gypsy moth sex attractant dispar- lure vs. that of the live female moth. J. Econ. Ent. 64(6): 1527-1529 ; Beroz2, Mand Coauthors... 1971. Activity and persistence of synthetic and natural sex attractants of the gypsy moth in laboratory and field trials. J. Econ. Ent. 64(6):1499-1508. Beroza.p. UM. Staten,;; Ro 1 ., and Biertl, 8. A. Lore. Vetradecys acetate and related compounds as inhibitors of attraction of the pink bollworm moth to the sex lure hexalure. J. Econ. Ent. 64(3) :580-582. Bierl, B. A. and Coauthors. 1971. Enhancement of the activity of extracts containing the gypsy moth sex attractant. J. Econ. Ent. 64(1) :297-300. a a Bosman, T. and Brand, J. M. 1971. Biological studies of the sex pheromone of Kotochalia junodi Heyl. (Lepidoptera: Psychidae) and its partial purification. Ent. Soc. South. Afr. 3J. 34(1):73-78. Deady, UU, E., Tumlinson, J. H.; 1II,.Brownlee; R. G., and Silverstein, R. M.- 1971. Sex stimulant and attractant in the Indian meal moth and in the almond moth. Science,171(3973): 802-804. Cantelo, W. W. and Smith, J. S.,; Jr. 1971. Attraction of tobacco hornworm moths to blacklight traps baited with virgin females. J. Econ. Ent. 64(6):1511-1514. Carlson, D. A. and Coauthors. 1971. Sex attractant pheromone of the house fly: isolation, identification and synthesis. Science 174(4004) :76-78. Cone, W. W., McDonough, L. M., Maitlen, J. C., and Burdajewicz, S. 1971. Pheromone studies of the twospotted spider mite. 1. Evidence of a sex pheromone. J. Econ. Ent. 64(2):355-358. Cone, W. W., Predki, S., and Klostermeyer, E. C. 1971. Pheromone studies of the twospotted spider mite. 2. Behavioral response of males to quiescent deutonymphs. J. Econ. Ent. 64(2):379- 382. Fatzinger, C. W. and Asher, W. C. 1971. Mating behavior and evidence for a sex pheromone of Dioryctria abietella (Lepidoptera: Pyralidae (Phycitinae)). Ent. Soc. Amer. Ann. 64(3) :612-620. Tistonn iy tk. , snorey, H. H., and Saario, -C. A.1971. . Sex pheromones of noctuid moths. XVIII. Rate of evaporation of a model compound of Trichoplusia ni sex pheromone from differ- ent substrates at various temperatures and its application to insect orientation. Ent. Soc. Amer. Ann. 64(2) :381-384. Green, N., Warthen, J. D., Jr.; and Mangum, -C. L. 1971. Analysis of hexalure as related to its attractancy to pink bollworm moths. J. Econ. Ent. 64(6) :1381-1384. Hammond, A. M. and Oliver, B. F. 1971. A sex pheromone in the rice stalk borer. Ent. Soc. Amer. Ann. 64(6) :1469-1470. hardeer eh Dp. - hindip,.O% He.,.,ands Davich,»T..B.. 1971. Suppression of populations of boll weevils over a large area in west Texas with pheromone traps in 1969. J. Econ. Ent. 64(4) :928- 933. Horcee.) De Dee Wilson, N.oM. , Mitchell, B.°B.,viand, Huddleston, P,. M. 1971. Factors affecting activity of grandlure, the pheromone of the boll weevil, in laboratory bioassays. J. Econ. Ent. 64(6) :1454-1456., Hanis he od. ane Coauthors. 1971. Mortality: of tephritids attracted to guava foliage treated with either malathion or naled plus protein-hydrolysate bait. J. Econ. Ent. 64(5): 1213-1216. AS vs Hwang, Y. S. and Mulla, M. S. 1971. Hippelates eye gnat attrac- tants. 1. Isolation and identification of ether-soluble coattractants produced by fermentation of whole-egg solids. Ent. Soc. Amer. Ann. 64(5):1086-1091. Jeiferson;, R. N., Sower;°LeoL. } and Rubin, Re Bi 2971. othe female Sex pheromone gland of the pink bollworm, Pectinophora gossypiella (Lepidoptera: Gelechiidae). Ent. Soc. Amer. Ann. 64(1) :311-312. Kinzer, G. W., Fentiman, A. F.; Jr.; Foltz, R. L., and Rudinsky, J. A. 1971. Bark beetle attractants: 3-methyl-2-cyclohexen- l-one isolated from Dendroctonus pseudotsugae. J. Econ. Ent. 64(4) :970-971. Kistner, D. H. and Blum, M. S. 1971. Alarm pheromone of Lasius (Dendrolasius) spathepus (Hymenoptera: Formicidae) and its possible mimicry by two species of Pella (Coleoptera: Staphylinidae). Ent. Soc. Amer. Ann. 64(3) :589-594. Klun, J. A. and Robinson, J. F. 1971. European corn borer moth: sex attractant and sex attraction inhibitors. Ent. Soc. Amer. Ann. 64(5):1083-1086. Kuwahara, Y. and Coauthors. 1971. Sex pheromone of the almond moth and the Indian meal moth: cis-9, trans-12-tetradecadienyl acetate. Science. 171(3973) :801-802. Ladd, T. L., Jr. 1971. Attractancy of mixtures of lures containing methyl cyclohexanepropionate for the Japanese beetle. J: Heon.- Ent. 64(6): 1560. Lewis, W. J., Snow, J. W., and Jones, R. L. 1971. A pheromone trap for studying populations of Cardiochiles nigriceps, a parasite of Heliothis virescens. J. Econ. Ent. 64(6) :1417- 1421. Lewis, W. d25 Sparks; (A./N., and Redlinger, LL. -M. 19712) Moth odor: a method of host-finding by Trichogramma evanescens. J. Econ. Ent. 64(2) :557-558. Lilly, C. E. and Shorthouse, J. D. 1971. Responses of males of the 10-lined June beetle, Polyphylla decemlineata (Coleoptera: Scarabaeidae), to female sex pheromone. Canad. Ent. 103(12): L757=1L 7/623 Madden, J. L. 1971. Some treatments which render Monterey pine (Pinus radiata) attractive to the wood wasp Sirex noctilio F. Bul. Ent. Res. 60(3) :467-472. McKibben, G. H. and Coauthors. 1971. Addition of food acidulants to increase attractiveness to boll weevils of bait con- taining cottonseed oil. J. Econ. Ent. 64(3) :583-585. McKibben, G. H. and Coauthors. 1971. Slow-release formulations of grandlure, the synthetic pheromone of the boll weevil. J, Econ. Ent.. 6401): 317-319, be GRA 523 Mitchell, W. C. and Mau, R. F. L. 1971. Response of the female southern green stink bug and its parasite, Trichopoda pennipes, to male stink bug pheromones. J. Econ. Ent. 64(4): 856-859. Morse, R. A. and Boch, R. 1971. Pheromone concert in swarming honey bees (Hymenoptera: Apidae). Ent. Soc. Amer. Ann, 64(6) :1414-1417., Osgood, C. E. 1971. An oviposition pheromone associated with the egg rafts of Culex tarsalis. J. Econ. Ent. 64(5):1038-1041. Osgood, C. E. and Kempster, R. H. 1971. An air-flow olfactometer for distinguishing between oviposition attractants and stimulants of mosquitoes. J. Econ. Ent. 64(5):1109-1110. Payne, T. L. 1971. Bark beetle olfaction. 1. Electroantennogram responses of the southern pine beetle (Coleoptera: Scolyti- dae) to its aggregation pheromone frontalin. Ent. Soc. Amer. Ann, 64(1) :266-268. Payne, T. L. and Stewart, J. W. 1971. Evidence for a sex pheromone in the cottonwood twig borer. J. Econ. Ent. 64(4): 987-988. Peacock, J. W., Lincoln, A. C., Simeone, J. B., and Silverstein, R. M. 1971. Attraction of Scolytus multistriatus (Coleoptera: Scolytidae) to a virgin-female-produced pheromone in the field, Ent. Soc. Amer. Ann. 64(5):1143-1149. Percy, J. E., Gardiner, E. J., and Weatherston, J. 1971. Studies of physiologically active arthropod secretions. VI. Evidence for a sex pheromone in female Orgyia leucostigma (Lepi- doptera: Lymantridae). Canad. Ent. 103(5) :706-712. Percy, J. E. and Weatherston, J. 1971. Studies of physiologically active arthropod secretions IX. Morphology and histology of the pheromone-producing glands of some female Lepidoptera. Canae- obit. LOS (12) -1733=1739. Pitman, G. B. and Vité, J. P. 1971. Predator-prey response to western pine beetle attractants. J. Econ. Ent. 64(2) :402- 404. Page, ie Ne LOFT, Distance, of. attraction of moths of: Spodoptera littoralis to BL radiation, and recapture of moths released at different distances of an ESA blacklight standard trap. J. Econ. Ent. 64(6):1402-1404. Robertson, P. L. See under Equipment and Techniques. hRociois, Wi, Comeau, A.; Hill; As} and: Milicevie,;, G. 1971. .Sex attractant of the codling moth: characterization with electroantennogram technique. Science 174(4006) :297-299. Roelofs, W. L. and Cardé, R. T. 1971. Hydrocarbon sex pheromone in tiger moths (Arctiidae). Science 171(3972) :684-686. AG Ces Roelofs, W. L. and Comeau, A. 1971. Sex pheromone perception: Synergists and inhibitors for the red-banded leaf roller attractant. J. Insect Physiol. 17(3) :435-448, Sanders, C. J. 1971. Daily activity patterns and sex pheromone specificity as sexual isolating mechanisms in two species of Choristoneura (Lepidoptera: Tortricidae). Canad. Ent. 103(4): s- a Sanders, C. J. 1971. Laboratory bioassay of the sex pheromone of the female eastern spruce budworm, Choristoneura fumiferana (Lepidoptera: Tortricidae). Canad. Ent. 103(5) :631-637. Sanders, C. J. 1971. Sex pheromone specificity and taxonomy of budworm moths (Choristoneura). Science 171(3974) :911-913. Schutz, G. A. and Boush, G. M. 1971. Suspected sex pheromone glands in three economically important species of Dacus. J. Econ. Ent. 64(2) :347-349. schwarz, M., Jacobson, M.; and Cuthbert, Fs Pt; Jni71go7e. (Chemical studies of the sex attractant of the banded cucumber beetle. J 2 Econ “Ent1764 (3) <%69=770; sharma, KR. K., Shorey; He H., and Gaston? Ls tK.1197L. (Sex pheromones of noctuid moths. XXIV. Evaluation of pheromone traps for males of Trichoplusia ni. J. Econ. Ent. 64(2):361- 364. iss Sower, L. L., Gaston, L. K., and Shorey, H. H. 1971. Sex phero- mones of noctuid moths. XXVI. Female release rate, male response threshold, and communication distance for Trichoplusia ni. Ent. Soc. Amer. Ann. 64(6):1448-1456. Sower, L. L., Shorey, H. H., and Gaston, L. K. 1971. Sex phero- mones of noctuid moths. XXV. Effects of temperature and photoperiod on circadian rhythms of sex pheromone release by females of Trichoplusia ni. Ent. Soc. Amer. Ann. 64(2): 488-492. ap Tumlinson, J. H. and Coauthors. 1971. Identification of the trial pheromone of a leaf-cutting ant, Atta texana. Nature 234 (5328) :348-349. Weatherston, J., Roelofs, W., Comeau, A., and Sanders, C. J. 1971. Studies of physiologically active arthropod secretions. X. Sex pheromone of the eastern spruce budworm, Choristoneura fumiferana (Lepidoptera: Tortricidae). Canad. Ent. 103(12): 1741-1747. Williamson, D. L. 1971. Olfactory discernment of prey by Medetera bistriata (Diptera: Dolichopodidae). Ent. Soc. Amer. Ann. 64(3) :586-589. Wright, R. H. 1971. Correlation of far infrared spectra and Mediterranean fruit fly (Diptera: Tephritidae) attraction. Canad. Ent. 103(2) :284-285.- = sages Wright, R. H., Chambers, D. L., and Keiser, I. 1971. Insect attractants, anti-attractants, and repellents. Canad. Ent. 103 (4) :627-630. Use. Dept, “ser. Prepared by Pest Survey and Coop. Econ. Ins. Rpt. Technical Support Staff 23(5):29-47, 1973 Le ae WEATHER OF THE WEEK ENDING JANUARY 26, 1973 Reprinted from Weekly Weather and Crop Bulletin supplied by Environmental Data Service, NOAA, PRECIPITATION: A storm centered over the middle Mississippi River Valley moved northeastward across Upper Michigan early in the week. Snow fell from this storm over the middle and lower Missouri River Valley and rain fell in the warm sector from the Ohio River Valley to New York. Light rain fell along the Texas coast. Numerous showers fell in the Florida Peninsula and several inches of snow fell in parts of New Mexico. A Pacific front moved into the Far West. Wednesday. It spread clouds and rain along the coast and snow in nearby hills and mountains. Snow also fell at midweek from the Ohio River across the northern Appalachians to New England. Shortly after midweek a Low developed in the western portion of the Gulf of Mexico. It caused snow from the Pecos River to the hill country Thursday forenoon. In some areas snow was mixed with freezing rain. Snow accumulated to 4 inches at San Angelo and vicinity. Cold rain fell from southern Oklahoma and east Texas to the lower Mississippi River Valley. As the weekend approached, warm moist gulf air streamed northward. Moderate to heavy rains fell from eastern Texas across the southern Great Plains. Light snow continued in parts of central Texas. The snow, combined in some areas with freezing rain, slicked highways and made travel hazardous. The precipitation area Spread northward and eastward and by Sunday most of the eastern half of the Nation received rain or snow. Snow fell in the Northeast, rain fell south of the snow belt. Freezing rain slicked roads in some spots south of the snow belt. The Pacific coast received precipitation at midweek, rain along the coast and snow at higher elevations. Blizzards, cold temperatures, howling winds, and blowing snow with near zero visibility occurred in the Great Plains Saturday. In some spots, snow drifts became several feet deep. Some roads became impassable. A number of — tornadoes struck central Florida Sunday. TEMPERATURE: Winter temperatures prevailed over much of the Nation early in the week. The mercury at Fraser, Colorado, tumbled to 28 degrees below zero Tuesday morning, January 23. Mild temperatures continued in the extreme Southeast early in the week with maximums reaching the 80's over southern Florida. By midweek, morning chill reached northern Florida where on Thursday Tallahassee and Jacksonville recorded 35 degrees. After- noon temperatures remained below freezing in the Great Lakes region Thursday. A warming trend occurred over the Great Plains at midweek. Thursday was especially mild with temperatures over the northern Great Plains climbing to the 40's and 50's. Rapid City, South Dakota, registered 67 degrees Monday and Imperial, Nebraska, warmed to 61 degrees Thursday afternoon. Cold weather returned to mid-America Friday and temperatures over the northern Great Plains remained near or below freezing over the weekend. Cool weather spread eastward and southward. By Sunday afternoon maximums in the 40's were common. Lafayette, Louisiana, registered only 47 degrees Sunday afternoon. Temperatures over the Far West remained fairly uniform and averaged slightly cooler than normal. Temperatures averaged 6 degrees to 12 degrees below normal over much of the Great Basin. The temperature from the northern Great Plains to New England averaged from 10 degrees to 20 degrees above normal in spite of a weak cooling trend. == — 1S. DEPARTMENT OF AGRICULTURE HYATTSVILLE, MARYLAND 20782 2 POSTAGE AND FEES PAID OFFICIAL BUSINESS U.S. DEPARTMENT OF TY FOR PRIVATE USE, $300 AGRICULTURE feo, een AGR 101 U.S.MAIL PENAL