Abstract
Drosicha stebbingi appeared in epidemic form during 1995-96 in the research gardens and avenue trees at the Pakistan Forest Institute Campus, Peshawar. An integrated control strategy was developed where cultural, mechanical and chemical methods were incorporated. During November - December 1.5 to 2.0 meter area around each previously infested trees of Jacranda mymosipholia and Paulownia spp. were hoed and in following February sticky bands were applied on stems at breast height level. For chemical control two experiments were carried out in RCBD. In first experiment five insecticides, i.e. Buldock 25 EC, Endon 35 EC, Fenvelrate 20 EC, Mepra 50EC and Sherpa 5EC were sprayed on stems of Paulownia spp. At the dose rate of 0.2% of given formulations. All the test insecticides reduced the pest population significantly over control with Mepra 50 EC most effective affording 2.4, 108 and 0.97 individuals of D. stebbingi per 225 cm2 bark area after 24, 48 and 72 hours of treatment, respectively. In the second experiment same five insecticides were sprayed on stems of Jacranda mymosipholia at the dose rates of 0.1, 0.2 and 0.5% of active ingredients. All the test insecticides were significantly effective in all test doses; however the differences among the dose rates were statistically non-significant. Endon 35EC and Mepra 50 EC were most effective @ 0.5% having 3.5, 0.9, 2.1 and 3.6, 2.8, 1.5 individuals of D. stebbingi per 225 cm2 of treated bark area after 24, 48 and 72 hours, respectively. The results indicated that integration of banding of tree trunks, destruction of eggs by soil working and application of insecticides was the most effective control strategy. Among the insecticides Mepra 50EC and Endon 35EC @ 0.2% are recommended for economical and ecological safe control of mango mealy bug.
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