A Population Dynamics Study of the Bollworm 1 and the Tobacco Budworm with Light Traps 23

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Abstract
Blacklight traps were placed in corn, grain sorghum, cotton, and pasture to study their usefulness in measuring Heliothis spp. adult populations and their movement between crops. The catches in each crop reflected significantly the effect of crop– Heliothis spp. affinity and illustrated the importance of trap location in evaluating blacklight trap catches. Rates of increase and successive generations were observed and measured. Rates of increase were reduced by as much as 80% on nights of full moon during June, July, and August. The parameters associated with monitoring and predicting Heliothis spp. populations that were measured can be fitted into a Heliothis spp. population dynamics model.

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