IMPACT OF CHLORPYRIFOS APPLIED AT DIFFERENT GROWTH STAGES ON INSECT PESTS OF OKRA (Abelmoschus escul

Field tests were undertaken in Kumasi, Ghana during the 2013 main and minor planting seasons to assess the effect of Chlorpyrifos sprays at various development stages of okra (Abelmoschus esculentus L.) on insect pest control. Chlorpyrifos was treated at 1.5 ml/0.5 litre water (sprayed vegetative), (ii) during just the reproductive development stage of the crop (beginning at 50 percent blooming of the crop - sprayed reproductive), and (iii) throughout the crop's growth cycle (sprayed throughout). A control patch that just got water was also kept. P. uniformis Jacoby and P. sjostedti Jacoby were also collected, however the former accounted for nearly 99 percent of the total. During the main season, the sprayed throughout plots had much less Bemisia tabaci Gennadius and Podagrica spp. than the other treatment plots, whereas the insecticide-treated plots had significantly fewer Thrips tabaci Gennadius than the control plots. In the minor season, the sprayed throughout plots had much more Podagrica spp. than the other treatment plots, and the sprayed throughout and sprayed reproductive plots had significantly more B, tabaci aggregated on the leaves of the plants than the control plots. In the main season, the insecticide-treated plots had significantly less % defoliation than the control plots, while the findings were mixed in the minor season. Even though only the treated reproductive plants had a substantial increase in okra output, There were no significant variations in the number of damaged okra fruits among plots.

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