Integrated control of mango mealy bug Drosicha stebbingi Green (Hemiptera: Margarodidae) infesting forestry tree species at the Pakistan Forest Institute, Peshawar
Integrated control of mango mealy bug Drosicha stebbingi Green (Hemiptera: Margarodidae) infesting forestry tree species at the Pakistan Forest Institute, Peshawar
Hanif Gul, G. A. Bajwa and G. N. Panhwar
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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March 1997
Vol. 47, Iss. 1
