The experiments reported here investigated the influence of high or low concentrations of nitrogen, phosphorus and potassium on the multiplication of X.campestris pv. malvacearum in cotton leaf tissue.
* Testing various versions of SIRATAC on a commercial scale. * Ptoviding a database of the response of cotton to damage. *Comparing the response of the new varieties Siokra and DP90 with DP61.
To determine the various factors affecting the loss of activity of insecticides on cotton over time. To detetemine the relative persistence of the range of insecticides used to control cotton pests, particularly Heliothis spp.