Integrated Pest Management of Insect Pest Population through Different Technique Strategies in Okra Agro Eco-System

摘要

Studies on suppression of insect pest population through different technique strategies in okra eco-system” was evaluated at experimental area of Sindh Agriculture University Tandojam during the kharif season of 2013. The results were revealed the in the case of IPM set-I. The seasonal population of insect pests total mean thrip (0.14 ± 0.03/leaf), jassid (1.10±0.24/leaf), whitefly (2.38±0.38/leaf), aphid (0.15 ±0.01/leaf) and spotted bollworm (0.57±0.04/plant) was recorded under the conditions of set I on okra crop. However, beneficial insects spider (3.19±0.07/plant), seven spotted beetle (0.31±0.07/plant), eleven spotted beetle (0.03±0.01/plant) and zigzag beetle (0.56±0.01/plant) was recorded on okra crop in the set I strategy. The results further indicated that in case of IPM set-II the insect pests and beneficial insects were recorded. Total mean population of thrips (2.27±0.32/leaf), Jassid (1.33±0.26/leaf), Whitefly (3.58± 0.63/leaf), aphid (2.59± 0.41/leaf) and spotted bollworm (1.45± 0.25/plant) was recorded in under the case of IPM set II on okra crop. However, the beneficial insect population such as, spider (3.84±0.68/plant), seven spotted beetle (0.72±0.14/plant), eleven spotted beetle (0.26±0.07/plant) and zigzag beetle (0.93±0.19) was recorded in set II. However, the results depicted, under IPM practices Set-III ( untreated or control) the insect pests and benifical insects was recorded. The population of sucking insect pest thrip (5.13±0.30/leaf), jassid (4.57± 0.20/leaf), whitefly (17.79± 0.78/leaf), aphid (1.8o± 0.05) and (2.48± 0.07/plant) was recorded in under the case of IPM set III. However, the benifical insect population such as, seven spotted beetle (2.89± 0.03/plant), eleven spotted beetle (1.18± 0.04/plant), zig zag beetle (0.68± 0.03/plant) was also recorded in under the case of IPM set III. The results showed that IPM Set-I found superior in relation to IPM set-II, as compared IPM set III on okra eco-system. However, in set I okra trap with maize crop, release of natural enemies and spray of neem leaf extract with neem oil product caused greater reduction of insect pests as compared IPM set II, okra trapped with sunflower, marigold, and spray of only neem leaf extract. While the population of beneficial insects was more in IPM set III on okra crop due to more population of insect pests. Keywords: Okra, Intercropping, Insects pests, Predators, Neem.