Effect of NeemAzal- T/S against the larvae of the Spiny bollworm, Earias insulana

Abstract

Experiments were conducted in the laboratory of Entomology and Zoology, Department of Plant Protection, College of Agricultural Studies (Shambat), Sudan University of Science and Technology (SUST) in the period of April-June, 2016. The aim of this study was to examine the effectiveness of (NeemAzal-T\S) against the larvae of Spiny boll worms Earias insulana (Boisd.). Four concentrations of NeemAzal- T/S were used (4, 2, 1 and 0.5 ml/liter) the results that the exterminator four concentrations negatively affect the mortality ratio in the larvae; the results showed a significant difference in the mortality percentage between different concentrations were as follows (respectively 30%, 23.33%, 16.66%, and 16.66%) After two hours of treatment and (86.66%, 73.33% 38.66%, 23.33%) After 24 hours of treatment and (90% 83.33%, 73.33%, 63.33%) After 36 hours of treatment and (100%, 96.66%, 93.33%, 90%) After 48 hours of treatment, respectively, compared with the control (0%).Additionally note that high repellent to the larvae