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| Effect of Neem Seed Extract on the Insect Pest Population of Different Chilli Varieties |
Enayat Aziz, Ghulam Jilani, Abdul Ghaffar Khoso, Farrukh Asghar, Ameer Uddin, Nadir Ali, Khalil Asghar
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Abstract:
The study was carried out on Effect of Neem seed extract on the insect pest population of different Chilli varieties in green house of the Faculty of Agriculture, Lasbela University of Agriculture, Water and Marine Sciences Uthal, Pakistan. The Repellency of Neem Seed Extract was studied against insect pests on chilli plants by free choice method. Three varieties of chilli, were sown were sprayed with Neem Seed Extract against whitefly, jassid, aphid and borer. The population of these insect pests and predators which was compared on three varieties of chilli crop sown in Randomized Complete Block Design (RCBD).The results showed that varietal preference of insect pests differed significantly. In chilli, varieties per population of whitefly were 2.10 and 1.97 on Talhari and Moro chilly respectively. The apex population was 5.5 whitefly / leaf on 25th January. It was 0.96 and 0.87 jassids / leaf on Moro chilly and Talhari varieties respectively. The apex population was 1.8 jassid / leaf on 19th February. It was 0.74 and 0.57 aphids / leaf on Moro chilly and Mirch shezadi respectively. The apex population was 2.95 aphid / leaf on 25th January. Per plant population of predators was 0.74 and 0.72 on chilli varieties Moro chilly and Talhari respectively. The apex population was 1.49 predator / plant on 9th February. Since pest population was increased beyond ETL on 25th January. Therefore 2 percent neem seed extract was applied on the crops on 25th January, 09th February and 24th February. These applications kept the pest population below ETL till the last observation on 5th March. Population of predators was not affected significantly by application of 2 percent of neem seed extract because of predators are not phytophagous like other pests.
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