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Ala. Contr o l of Cotton Insects * To determine effectiveness of 



new insecticides against the boll weevil and other cotton insects 

 and the effect of controlling various species upon the yield of 

 cotton and to develop a dusting schedule for the control of the 

 major insects attacking cotton, 

 Zool., Ent. 512 



Ariz. B reeding Cotton for Disease and Insect Resistance and for 



Plant°Types Suitable for Mechanical Harvesting . To (1) evaluate 

 resistance of present breeding stocks to local diseases and 

 insects and ability for mechanical harvesting, (2) introduce 

 stocks from other localities having similar problems, &) cooperate 

 in production of high yielding varieties of good spinning quality 

 suitable for mechanical harvesting and (k) provide adequate initial 

 seed stocks of desirable strains for distribution to growers. 

 PI. Brdg., PI. Path. 278 (S-l) Coop. APS 



Ariz. The Biology and Control of Insects Affecting Cotton in 



Arizona. _ (1) Ecological Studies of Cotton Insects , a The more 

 important pests should be studied in relation to their places of 

 origin, if waste land, ditch banks, cultivated field, etc. 

 b Occurrence of parasitic and predator insects should be studied 

 to learn which species are present in significant numbers in 

 Arizona, which species are effective against which pest, which 

 control methods and environmental factors favor or restrict their 

 effectiveness, a Information is needed regarding pest fluctuation 

 in relation to control practices. (2) Life History Studies . 

 Information is needed concerning spider~mites, thrips, aphids, 

 darkling beetles, cotton leaf perforator, cotton "leaf -roller "• 

 (3) Chemical Control Studies . Toxicological Studies, Residue 

 Deposit Studies, Test of New Compounds, (k) Miscellaneous 

 Studies . Existing information dealing with Arizona cotton 

 insects would be assembled and with cooperation of USDA Entomologists 

 information would be issued. Field infestations of said pests, 

 populations of beneficial insects and presence of actual plant 

 injury would be studied. Types of possible insect injury to 

 marketed product should be investigated. 

 Ent. 383 Coop. ARS 



Ark. Improvement of Insecticide! Control of Cotton Insects . 



(l) Develop better timing of insecticidal applications in relation 

 to infestations, weather, and agronomic practices. (2) Learn 

 feeding habits and methods of exposure of weevil to insecticides. 

 (3) Develop alternative insecticides and control methods for weevils 

 and aphids. (k) Study off-season habits and activities of cotton 

 insects in relation to outbreaks on cotton. (5) Evaluate predator 

 populations and factors affecting them. 

 Ent. 333 



