About this Session

Cotton Insect Management

Presented by: Dr. Gus Lorenz, Professor-Extension Entomologist, University of Arkansas Division of Ag – Extension

Each year, the bollworm (Helicoverpa zea, Bodie), infests 100% of cotton planted in Arkansas. It remains a major pest of post-bloom cotton in the Mid-South despite widespread use of transgenic varieties. Dual gene Bt cotton does not always provide adequate protection from lepidopteran pests to maintain potential yield.  In years when bollworm populations are high, foliar insecticides are commonly used to supplement control of cotton bollworm. In recent years we have seen a decline in control of bollworm with dual gene cotton.   A recent analysis of data indicates that there has been an increase in damage to squares which might indicate tolerance is developing to dual gene technologies.  Economic loss to the grower based on cost of treatment and reduction in yield due to this pest totals more than $1.7 million or $9.41 per acre, in 2020 that figure is much higher. We will discuss the impact and efficacy of foliar over sprays on conventional and dual-gene cottons, and the role of 3 gene cotton for growers in the Midsouth.

Management of Cotton Insects to Maximize Profit

Presented by: Dr. Whitney Crow Assistant Professor, Extension Entomologist, Mississippi State University

Guidelines on management of cotton insects to maximize profits in 2020.  Focus will be on current issues facing cotton production and the best management practices to minimize input cost.