- Ik - 



Okla . Investigations of the Biology and Control of 



Arthropods Attacking Small Grains . (1) Study resistance of 

 small grain varieties to greenbug attack to learn superior 

 germ plasm for breeding program. (2) Study insecticides to 

 find materials less toxic to warmblooded animals, more 

 effective at lover temperatures, more residual, more specific 

 to injurious insects, and less expensive. Search for 

 insecticides giving long lasting protection in seedling stage. 

 (3) Learn most effective chemical control measures for brown 

 wheat mite so recommendations can be made, (k) Learn effect 

 of brown wheat mite on yield of wheat, barley, and oats. 

 Study (5) effect of tillage, fertility, crop rotation, and 

 variety of small grains on mite populations; (6) biology and 

 ecology of mite so to compare conditions in this area with 

 those in central portion of western plateaus area. (7) Learn 

 effect of arthropods other than greenbug on yield of small 

 grains and develop more effective methods for control. 

 Ent. 951 



Pa. Resistance of Hybrid Corn to Insects . To (l) develop 



new and improve present techniques to evaluate hybrid corn 

 resistance and/or tolerance to these insects; European 

 corn borer, corn leaf aphid, Japanese beetle, southern corn 

 rootworm, seed corn maggot, thrips, seed corn beetle, and 

 wireworms; (2) evaluate field plot corn to establish its 

 resistance and/or tolerance to insects listed above; and (3) 

 study influence of environmental factors on resistance, and/or 

 tolerance of hybrid corn to ^insects listed above. 

 Ent. 911-C 



Pa. Development of Insect Resistance in Small Grains . 



(1) Survey and evaluate small grain varieties, including 

 presently used Northeast varieties, for insect resistance. 



(2) Develop new or utilize known techniques for evaluating 

 insect resistance and its inheritance in small grains. 



(3) Investigate effect of environment upon expression of insect 

 resistance in small grains, (k) Incorporate insect resistant 

 stock into small grain varieties as integral part of breeding 

 program for superior agronomic and pathologic characteristics. 



Agron., Ent. 1272 Coop. ARS 



S . C . Bio n omics and Control of Heliothis Armigera (Hubner) 



as a Pest of Corn and Tomatoes '^ To determine factors in 

 life history of the insect influencing its control, study 

 physical properties of diluents and ways in which their 

 effectiveness and usefulness may be increased, and test under 

 field conditions combinations of chemicals and diluents 

 showing promise of control in laboratory studies. 

 Ent. 123 



