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SPECIAL INSECTS OF REGIONAL SIGNIFICANCE 



ARMYWORM ( Pseudaletia unipuncta ) - NEW YORK - Recovered 5 moths in Minetto black- 

 light trap July 26-30 in Oswego County. Armyworm and cutworm infestations did 

 not develop as expected except in poorly controlled weedy no-till cornfields. 

 (N.Y. Wkly. Rpt.). NEBRASKA - Infestations on corn reported in York, Seward, 

 and Platte Counties. Some controls applied; most infestations light. Three 

 Seward County fields averaged about 20 percent infested with 1-2 larvae per 

 plant. Presence of armyworm associated with growth of grasses in and around 

 irrigation ditches. (Keith et al.). 



BEET LEAFHOPPER ( Circulifer tenellus ) - COLORADO - Ranged 10-25 per 100 sweeps 

 of sugar beets in Otero County. (Schweissing) . CALIFORNIA - Population checks 

 of Russian thistle stands on west side of Imperial Valley indicate popula- 

 tion uniform through Coalinga, Fresno County, to Kern and Kings County line. 

 Ratio of adults to nymphs indicates adult die-off and hatch of second summer 

 generation. Curly-top surveys in Glenn, Butte, and Colusa Counties indicate some 

 heavy damage. Highest damage percentages near Chico, Butte County, and near 

 Hamilton City in Glenn County. Curly-top infection averaged 5 percent in Butte 

 County and 16 percent north of Dayton and south of Chico. (Cal. Coop. Rpt.). 



CORN EARWORM (Heliothis zea ) - DELAWARE - Adults averaging 7 per night in black- 

 light traps in Sussex County. (Lesiewicz) . MARYLAND - Moth counts averaged 8 per 

 night in Dorchester County, and 1-2 per night in Worcester and Queen Annes 

 Counties. Damage to sweet corn ranged 2-8 percent statewide. All instars present 

 in infested ears. (U. Md., Ent . Dept.). VIRGINIA - Infestation 47.2 percent in 

 New Kent, Hanover, King and Queen, Middlesex, and Essex Counties. Samples taken 

 from Lancaster, Northumberland, Westmoreland, and Richmond Counties showed 

 infestation level of 21.0 percent in field corn. Second through fifth instars 

 noted, indicating moths will emerge over long period of time. Blooms on soybeans 

 appearing in these areas; next generation will attack developing beans. (Allen). 

 KENTUCKY - Larvae damaged corn in Owsley and Lee Counties. Larvae averaged 2 per 

 10-plant sample in Breathitt County. (Barnett) . NEBRASKA - Light in all corn. 

 Most infestations less than one percent. About 12 percent of ears infested with 

 third to fifth instars in Seward County field. (Keith et al.). OKLAHOMA - 

 Averaged 1 larva per head in sorghum in Washita County. Heavy in Cotton County 

 and moderate in Kay County. Ranged from absent to very light in sorghum heads 

 in Wagoner and Muskogee Counties. Heavy in corn in Osage County. Averaged 2 per 

 10 sweeps of alfalfa in Wagoner County. Occasional larva in soybeans in Wagoner 

 and Muskogee Counties. (Okla. Coop. Sur.). ARKANSAS - Found in 12 of 22 fields 

 surveyed. Heaviest count, 15 per 10 row feet. Most sorghum past susceptible 

 stage, except for late crop which will not be susceptible until later. (Boyer) . 

 TEXAS - Heaviest infestations observed in Lubbock and Crosby County area. 

 Infestations noted in preboot sorghum and in grain sorghum heads. Corn earworm 

 heavy in Jones, Baylor, Hardeman, and Haskell Counties in whorls of grain sorghum. 

 (Rummel, Boring). 



CORN LEAF APHID ( Rhopalosiphum maidis) - WISCONSIN - Very heavy on some corn in 

 nearly every county. Heaviest populations appear to be in central areas and some 

 controls applied. Disease among aphids becoming evident. Lady beetle larvae 

 pupae, and adults numerous in fields with heavy aphid populations. Green lacewing 

 adults and eggs numerous in some fields. (Wis. Ins. Sur.). MARYLAND - Generally 

 light. Infested corn ranged 5-20 percent in Kent, Dorchester, Talbot, and 

 Caroline Counties. Aphids moving onto tassels in Harford, Baltimore, Howard, and 

 Frederick Counties. Heaviest infestations ranged 20-40 percent in central areas. 

 (U. Md., Ent. Dept.). ALABAMA - Light to heavy in all grain sorghum and corn 

 examined in Greene, Sumter, and Bibb Counties. Occurrance of maize dwarf moasic 

 and/or corn stunt virus more widespread and damaging in corn in central and 

 northern areas than previously reported. (Smith et al.). OKLAHOMA - Declining in 

 sorghum in Texas County as plants mature. Ranged 50-600 per plant. Light on 

 leaves of nearly mature sorghum in Muskogee County. (Okla. Coop. Sur.). WYOMING - 

 Very heavy in corn near La Grange, Goshen County. Also damaged Sudex near Lusk, 

 Niobrara County. (Burkhardt) . UTAH - Heavy in several fields of spring barley 

 in Manti and Ephraim area of Sanpete County. (Knowlton, Herring). 



