- 729 - 



SPECIAL INSECTS OF REGIONAL SIGNIFICANCE 



CORN EARWORM (Heliothis zea ) - MARYLAND - Feeding damage by this species and 

 Trichoplusia ni (cabbage looper) averaged 10 percent in 400 acres of spinach near 

 Vienna, Dorch'ester County. Controls applied. (U. Md., Ent . Dept.). VIRGINIA - 

 Larvae 6 per 100 sweeps of alfalfa in Roanoke County field. Most larvae second 

 and third instars« (Allen). MISSISSIPPI - Trapped 431 moths in light trap at 

 Stoneville, Washington County, October 1-7. (Pfrimmer et al.). 



GREENBUG (Schizaphis graminum ) - NEW MEXICO - Light to moderate on barley in 

 Chaves County . (Mathews) . TEXAS - Ranged up to 20 per row foot of wheat in Randall, 

 Deaf Smith, Oldham, and Potter Counties. Heaviest range 0-20 in Deaf Smith 

 County. (Daniels). SOUTH DAKOTA - Trace in 220 acres of winter wheat north of 

 Pierre and south of Okobojo Creek in southwestern Sully County. (Singleton). 



CORN, SORGHUM, SUGARCANE 



EUROPEAN CORN BORER (Ostrinia nubilalis ) - MINNESOTA - Fall survey about 50 per- 

 cent completed. Shank damage due primarily by second-generation borers much 

 heavier than normal, but ear drop averaged less than 1 percent. Percent shank 

 infestation averaged by district: South-central 45, southeast 23, east-central 

 10, west-central 33. (Minn. Pest Rpt.). NEBRASKA - Fall surveys complete. Average 

 population heavier than 1970. Decline seen in southeast and northeast, despite 

 large northeast first brood. Drought reduced survival in both areas. In east 

 district, population less than 1970; scattered heavy infestations seen in Butler 

 and Polk Counties, heavy in Kearney, Harlan, Dawson, and Hall Counties, Some 

 central and south district fields showed 19 borers per plant. (Berogan, Keith). 



FALL ARMYWORM (Spodoptera frugiperda ) - FLORIDA - Accounts for 80 percent of 

 population infesting sweet corn, before silking, in Palm Beach County. Damaged 

 60-80 percent of sweet corn buds in untreated field plots at Belle Glade. 

 (Janes) . 



SOUTHWESTERN CORN BORER (Diatraea grandiosella ) - TENNESSEE - Heavy in late corn 

 in central areas. Lodging 80 percent in late corn in Weakley County. (Pless) . 



A GROUND BEETLE (Apristus constrictus ) - WASHINGTON - Collected October 4 in 

 yellow trap in Yakima County, for a new county record. Determined by M.H. 

 Hatch. (Landis) . 



A SCARAB (Euphoria rufobrunea ) - WASHINGTON - Collected October 4 in yellow trap 

 in Yakima County, for a new county record. Determined by M.H. Hatch. (Landis). 



SMALL GRAINS 



FALL ARMYWORM (Spodoptera frugiperda ) - OKLAHOMA - Averaged 12 per square foot in 

 small grain checked in Tillman County „ Light in wheat and rye in Nowata County. 

 (Okla. Coop. Sur.). TEXAS - Increased on small grains throughout much of the 

 Rolling Plains area. Damaging in Dickens, Knox, Clay, Fisher, Shackelford, Jones, 

 Foard, Childress, and Wilbarger Counties. Insecticides applied in some areas „ 

 (Boring). ARKANSAS - Continues problem on wheat in southeast areas. Infestations 

 observed in Desha County. Very light in east-central areas, but one field treated. 

 (Boyer) . 



BROWN WHEAT MITE (Petrobia latens ) - SOUTH DAKOTA - Ranged 2-16 per leaf; damaged 

 40 acres of 80-acre field of volunteer barley in southeastern Haakon County. Light 

 on nearby winter wheat. (Jones). 



