Effect of Neem Extract on Leafhopper of Potato Crop at Quetta, Balochistan, Pakistan
Field studies on efficacy of neem extract against Leafhopper (Amrasca biguttula biguttula) on potato crop (Solanum tuberosum L.) were carried out at the Insect Systematic Postgraduate Laboratory, Department of Entomology, Sindh Agriculture University Tandojam and Quetta Baluchistan, during the year of 2015. The crop was shown on well prepared seed bed in a Randomized Complete Block Design keeping a net treatment plot area of 5x4 meter with 4 replications and 4 treatments. The pre-treatment observations were taken 24hrs before spray, whereas, post-treatment observations were taken at the intervals of 24hrs, 48hrs and 72hrs after the respective spray. Relative neem extract displayed greater reduction of leafhopper (A. b. biguttula). The results revealed that all the sprays of neem extract against potato leafhopper (A. b. biguttula) remained effective after the observation of leafhopper (A. b. biguttula) population on 24hrs, 48hrs and 72hrs after the respective spray.T4=100cc/plot, showed highest efficacy (59.31a %) trough out the three sprays followed by T3=75cc/plot(50.71b %), T2=50cc/plot (43.23c %) and T1=25cc/plot (43.23d %) respectively, with comparison to T5=Control/untreated (7.09e %).
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