Efficacy of Plant Seed Oils Against Callosobruchus maculatus L. on Chickpea Grains
Efficacy of Plant Seed Oils Against Callosobruchus maculatus L. on Chickpea Grains
Agha Mushtaque Ahmed1*, Fahad Nazir Khoso1, Ali Zachi Abdulqader Alhilfi2, Sohail Ahmed Otho1, Qurban Ali3, Din Muhammad Soomro1 and Zubair Ahmed Soomro1
ABSTRACT
Pulse beetles (Callosobruchus maculatus L.) often damage the stored grains to such an extent that a huge quantity of total production is significantly affected. For last few years, a substantial consideration has been given globally to different botanical oils due to their pesticidal properties and environmental safety. In this context, we evaluated the insecticidal effect of four botanical oils against C. maculatus including neem seeds (Azadirachta indica A. Juss), rocket seeds (Erucas sativa Mill.), cotton seeds (Gossypium hirsutum L.) and mustard seeds (Brassica nigra L.). The effect of these oils was recorded on insect mortality, number of adult insects, seed damage (punctured seeds and weight loss of chickpea seeds), seed germination percentage, root length (cm) and seed vigour index. The insect mortality was recorded at different intervals such as 24, 48, 72 hrs and 1 week) and the results indicated that E. sativa gave a consecutively higher mortality at each interval, meanwhile the highest at one week (50.00%) as compared to other treatments followed by A. indica (45.35%). Besides, E. sativa oil did not allow the pest to breed freely thus few numbers of adults C. maculatus (71.67±14.92) on chickpea seeds with minimum seed damage (punctured seeds 75.44 ±9.67; seed weight loss 3.18±1.37) was conclusively observed for three months. The results regarding the effect of botanical oils against C. maculatus and on seed characteristics showed that E. sativa and A. indica oils were comparatively better in order to control the pest population and are recommended for stored grains pest management.
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