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Tex. Spraying Equipment for the Control of Cotton Insects 



and for Defoliation * To (1) improve spraying equipment in 

 efforts to obtain "better distribution of chemicals for 

 control of pink bollworm; (2) determine nozzle type, 

 arrangement and spacing to give optimum spray patterns for 

 insect control including pink bollworm and for defoliation 

 of cotton plants; and (3) check insect infestations to 

 determine effectiveness of insecticidal applications with 

 various types and arrangements of nozzles on booms and effects 

 of chemical removal of foliage of cotton on full populations 

 of insects, especially overwintering of pink bollworms in 

 unharvested material. 



Agr. Engin., Ent. 722 



Tex. The Relationship Among Insects, Ins ectici des, Weather 



and Host Plants in the Control of Field Crop Pests, with 

 Special Reference to Cotton . To determine (1) effect of 

 wind, rain, temperature, light, humidity, and dew, under 

 controlled conditions individually and in combination, on 

 the toxicity of various insecticides to specific insect 

 pests; (2) effect of age, size and condition of growth of 

 host plant on the toxicity of insecticides to plant pests; 

 (3) speed of action of various insecticides to certain pests; 

 and (10 effect of dosages and single and multiple applications 

 on residual toxicity of insecticides. 

 Ent. 933 Coop. ARS 



Tex. Treatment ^Sche dules fo r Con trol of Inse cts Attack ing 



Cotton . To determine most economical schedules of 

 insecticidal applications for control of cotton insects. 

 Ent. 93k Coop. ARS 



Tex. Flax Improve ment. To (l) develop or discover new 



varieties of flax better suited to Texas than now available, 

 (2) search for greater cold resistance among imported or 

 domestic strains and hybrid material, (3) cooperate in 

 testing domestic and imported strains for sources of 

 disease resistance, cold resistance and agronomic 

 characteristics of value in the program, (k) test rate and 

 date of seeding, fertilizer needs of crop and cultural 

 methods for flax, (5) cooperate in control tests of nematodes 

 and insects which attack flax. 



Agron., PI. Physiol., Path. 1028 Coop. ARS 



