- 506 - 



Maize dwarf mosaic and/or corn stunt virus in scattered fields in Shelby. Dallas, 

 Montgomery, and most other counties. R. maidis and other aphids light in all corn 

 examined. (McQueen). ~ 



GREE>fBUG ( Schizaphis graminum ) - ARIZONA - Starting buildup on sorghum at Bonita, 

 Graham County and in other areas of Cochise County. Ranging 25-150 per plant. 

 (Ariz. Coop. Sur.). TEXAS - Populations reported throughout most central and 

 north-central counties. Light and localized in Caldwell County on grain sorghum. 

 Averaged 0-1 per plant in Brazos, Burleson, and Robertson Counties. Beneficial 

 insects heavy with parasitism evident in many of fields. Greenbugs continued to 

 damage grain sorghum in Ellis and Navarro Counties. Counts of 260 per leaf noted 

 in these counties. Grain sorghum with lower 2 leaves dead. Several fields treated, 

 parasitism seemed to be decreasing infestations. Greenbug light in several 

 counties in Rolling Plains. Light on grain sorghum in El Paso, Hudspeth, Reeves, 

 and Pecos Counties. Populations in panhandle area remained light. (Green et al.). 

 OKLAHOMA - Moderate to heavy on sorghum in Ottawa County. One field sprayed in 

 Texas County. Ranged 5-60 per plant on occasional plants in field of 24-inch tall 

 grain sorghum in Major County, but younger fields (12-15 inches) in several 

 northwest counties negative. (Okla. Coop. Sur.). KANSAS - Treatments needed in 

 several sorghum fields in eastern Shawnee, western Douglas, and Jackson Counties. 

 Populations appear to be increasing and predators and parasites generally not 

 abundant enough to control populations. Greenbug ranged (per plant) as follows 

 by county (number fields checked in parentheses): Shawnee 1,000-1,500+ (4); 

 Douglas 300-1,600+ (3); Jackson 50-2,000 (3); and Geary 35-630 (3). Most sorghum 

 30-40 inches high; many in boot stage. Heavier infestations (about 1,200+ per 

 plant) with lower 2 leaves dead, and in one field in Jackson County lower 4 leaves 

 dead. Report of heavy infestation in one sorghum field with lower 2 leaves dead 

 in Pawnee County. (Bell). 



NEBRASKA - S, graminum declining in some southwest areas; increasing in eastern 

 counties. Cfolonies of 50 individuals in some fields in Lancaster County. (Klein, 

 Nelson). IOWA - Up to 2 lower leaves dead in sorghum field in Ringgold County. 

 Surveys in 12 additional fields indicated 2-4 leaves per plant infested. (Iowa 

 Ins . Sur.) . 



POTATO LEAFHOPPER (Empoasca fabae) - NEW YORK - Increasing in alfalfa. Control 

 needed when nymphs 1-2 per 10 sweeps. (N.Y. Wkly. Rpt., July 6). MARYLAND - 

 Ranged 4-30 per sweep of alfalfa in Frederick, Harford, Baltimore, and Howard 

 Counties. Expected to increase. (U. Md . , Ent . Dept . ) . OHIO - Damage noted 

 statewide. (Flessel) . MICHIGAN - Adults common and some nymphs and leaf rolling 

 in dry beans in Bay County. Nymphs and adults common in alfalfa in Ingham County. 

 Growers should stay alert. (Ruppel et al.). WISCONSIN - Adults averaged 1 per 

 sweep of alfalfa in Columbia County and 6 per 10 sweeps in southwestern counties. 

 Populations abundant in Rock and Walworth Counties, nymphal counts as high as 15 

 per sweep and adults 5 per sweep. Adults averaged 2 per plant on lima beans in 

 Rock County and trace on potatoes and snap beans in Portage and Waushara Counties. 

 Common on deciduous nursery stock in all southern areas. (Wis. Ins. Sur.). 



TOBACCO BUDWORM ( Heliothis virescens ) - TENNESSEE - Immatures continue to cause 

 moderate to heavy damage in tobacco surveyed in central areas. Some controls 

 applied. (Gordon). 



HORNWORMS ( Manduca spp . ) - KENTUCKY - M. sexta (tobacco hornworm) larvae averaged 

 less than 1 per 20 tobacco plants in Caldwell County. One field in Hopkins County 

 averaged 3 per plant. (Barnett). MICHIGAN - Limited collections of M. sexta made 

 at blacklight stations. M. quinquemacula ta (tomato hornworm) moths light aT all 

 blacklight stations as far north as Montcalm County. Egg laying will begin 

 primarily on potatoes and tomatoes. (Newman). MARYLAND - Manduca spp. egg laying 

 continues on tobacco in Charles, St. Marys, Calvert, and Prince Georges Counties. 

 Heaviest damage 10-15 percent in several fields in St. Marys County. Second and 

 third instars in most fields. (U. Md . , Ent. Dept.). 



