429 



840. Sterling, W. L. 1971. A complete cotton pest protection system. Prog. 

 Farmer (Spring Bonus Issue): 24. 



Dovm the road, cotton growers can look to other highly promising tools in their 

 cotton protection systems: release of sterilized insects into native populations 

 to disrupt reproduction is being tested with pink bollworms and boll weevils. 

 Another approach is to place a chemical sterilizing material in the field and 

 lure native insects to it. Juvenile hormones may be introduced into native 

 populations of boll weevils, pink bollworms, and bollworms to prevent them from 

 reaching adulthood and reproducing. Fields may be "seeded" with insects with 

 genetic deficiencies, such as the inability to diapause, to break the insect 

 life cycle. Artificial lighting of cottonfields has been demonstrated by one 

 Texas A&M University researcher to prevent or reduce egg-laying by bollworm 

 and budworm moths. Biological controls - rearing and releasing overwhelming 

 numbers of beneficial insects in cottonfields or spraying the crop with a virus 

 or bacteria - may provide control of the bollworm and budworm complex without 

 harmful effects on beneficial insects or the environment. Cotton varieties re- 

 sistant to insects, such as fleahoppers, lygus, bollworms, budworms, and weevils, 

 are being developed. As these dramatic new weapons become available, it will 

 become increasingly important that cotton producers become "systems oriented." 

 That way, they will bei able to put together a complete crop protection program 

 that will be effective and economical. 



841. . 1971. Winter survival of the boll weevil in the High and Rolling 

 Plains of Texas. J. Econ. Entomol. 64: 39-41. 



Cage studies of the overwintering ability of Anthonomus grand is Boheman showed 

 that higher percentages of individuals reared on cotton bolls survived the 

 winter than did individuals reared on squares or a cottonseed meal diet, or 

 adults collected from the field. The time during the fall that boll weevils 

 were placed into overvintering cages did not affect the time of emergence in 



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