Efficacy of Different Bio-Pesticides against Major Sucking Pests on Brinjal under Field Conditions

Abstract

A field study was carried out during 2015 at the experimental area of Entomology Section, Agriculture Research Institute, (ARI) Tando Jam to examine the efficacy of different bio-pesticides against major sucking pests on brinjal under field conditions. Four treatments with three replications were applied. The treatments were: T1=Neem (Azadirachta indica), T2= Tobacco (Nicotiana tabacum), T3= Datura (Datura stramonium) and T4=Control (untreated). Three insect pests were found infesting brinjal including white flies, jassid and mites. Pre-treatment and post-treatment observations were recorded.The results revealed that against white fly, the first spray of Neem extract showed highest reduction percent (82.60%) followed by Tobacco extract (75.95%), Datura extract (73.93%), and lowest for untreated control (11.07%); while in the second spray also Neem extract showed highest effect against white fly (67.53%); followed by Tobacco extract (56.43%), Datura extract (42.25%), and least by untreated plot (5.49%). Against jassid, Neem extract showed highest effect (55.95%) as observed during 1st spray, followed by Tobacco extract (53.38%), Datura o extract (63.11%)and untreated control (8.00%), while after second spray also Neem extract showed highest reduction percent (68.73%) followed by Tobacco extract (55.72%), Datura extract (50.66%) and the lowest was resulted by untreated control (13.90%). Against mites population on brinjal the first spray results showed that Neem extract showed highest effect (96.19%) followed by Tobacco extract (95.75%), Datura extract (86.86%) and least population was recorded in untreated control (9.96%). After second spray, Neem extract showed highest reduction percent (98.33%), followed by Tobacco extract (92.85%), Datura extract (88.93%) and the lowest reduction percent was resulted by untreated control (9.14%)respectively. Neem extract showed its superiority in effect to combat sucking insect pests studied in brinjal, followed by, Tobacco extract, Datura extract and untreated control remained the least.