Def and Folex should be more effective than in 96. Ethephon treatments for boll opening may be less critical. Ethephon tank mixes however will be useful in areas with whitefly for faster leaf drop. Standard rates of chlorate as split applications should be more effective than in 1996. Sequential applications required.
First application aims to open canopy.
Higher rates usually required on second application to defoliate or desiccate remaining leaves. Table 1. ranks the overall performance at 14 -21 days after treatment of standard defoliation treatments for the San Joaquin Valley. Table 2. summarizes the 1996 results of the Acala defoliation screening study. The field conditions that produced the results in 1996 are more representative of condition 2 above. 55-80 Table 2.