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Ariz, Insect Parasites in Relation to Producing Chalcid 



Injury to Alfalfa Seed Crops , Learn (1) identity, nature, 

 and effectiveness of natural enemies of clover seed 

 chalcid occurring in irrigated seed alfalfa fields; 

 (2) the more important environmental conditions favoring 

 or restricting activity of chalcid and its natural 

 enemies; emphasize effect on yield and quality of alfalfa 

 seed, (3) Study feasibility of minimizing chalcid damage 

 to alfalfa seed crops by using practices to restrict 

 chalcid activity or stimulate activity of natural enemies. 

 Eat. y+5 (W-I4-3) 



Ark. Ecology and Control of the Spotted Alfalfa Aphid , 



(l) Learn causes of outbreaks and evaluate factors 

 effecting duration and intensity of outbreaks and evaluate 

 effect of cultural practices on populations of aphids and 

 their natural enemies, (2) Improve biological control by 

 release of parasites and other agents, and develop cheap and 

 effective insecticidal controls. (3) Evaluate resistance 

 and susceptibility to aphids of alfalfa varieties and 

 breeding material, and locate resistant plants for use as 

 breeding material. 



Ent. k$2 (S-25) 



Ark. Biology and Control of Three -Cornered Alfalfa Hoppe r. 



(l) Study life cycle and seasonal history of insect; 

 learn factors affecting its abundance, and evaluate its 

 capacity for damage. (2) Study direct and indirect 

 methods of control. 



Ent. kjk (S-25) Coop. U. S. Natl. Museum 



