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S-25 The Biology and Control of Insects and Mites Attacking 



Forage Crops , To determine species and extent of injury of 

 insects and/or mites injurious to forage crops, their life 

 and/or seasonal cycles, habits, occurrence and distribution. 

 To determine the relationship of ecological factors and 

 cropping practices to insect and/or mite abundance and 

 injury. To determine influence of predators, parasites, 

 and the use of chemicals to control certain species on 

 populations of other species of insects and/or mites. To 

 develop practical control measures for the injurious 

 species. 



Cooperating stations and agencies: Ark. IV, Ga. V, 

 Ky. I, La. V, Miss. V, Tenn. I, Tex. IV, Va. V ARS 



S-37 Pink Bollworm Control . To investigate the biology and 



biological control of the pink bollworm. To evaluate 

 cultural control practices and equipment, particularly those 

 influencing winter survival. To develop effective chemical 

 controls and coordinate these with the control of other 

 cotton insect pests. To evaluate cotton types for resistance 

 or tolerance. 



Cooperating stations and agencies: Ark. Ill, Tex. HI 

 ARS, Oscar Johnston Foundation 



W-37 The Biology, Ecology and Control of Rangeland 



Grasshoppers . Determine species of grasshoppers, type and 

 amount of food (grass or forbs or shrubs) consumed or 

 destroyed by each species, seasonal history and migratory 

 habits, effect of soil types, vegetative types and density, 

 topography, etc. on species distribution, factors of 

 environment such as changes in habitat, etc. which are 

 responsible for population fluctuations and develop and 

 recommend practices for rangeland grasshopper control. 



Cooperating stations and agencies: Calif. V, Colo. I, 

 Idaho I, Mont. I, Wyo. V ARS 



W-I43 Leguminous Forage Crop Insect Pests . To determine the 



manner and extent to which yield factors such as stand and 

 growth rates are influenced by the abundance and activities of 

 insects. To determine the manner and extent to which quality 

 factors such as germination, nutritiVe value and market 

 acceptability are affected by abundance and activities of 

 insects. To determine relation of insect population levels to 

 economic injury. To determine factors influencing insect 

 abundance and activity with special reference to control 

 practice. 



Cooperating stations and agencies: Ariz. IV, Calif. IV, 

 Utah IV, Wash. IV, Wyo, IV ARS 



