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Vol. 11, Special Issue 5 (2022)

Seasonal abundance of insect pests and natural enemies in sunflower in the Western Undulating zone of Odisha

Author(s):
SK Nayak, Nilambar Khura and RL Moharana
Abstract:
Study on seasonal incidence of insect pests and their predators in sunflower in the Western Undulating Zone of Odisha during 2019-20 revealed that the sucking pest like white fly, jassids and aphids appeared at early growth stage of sunflower and continued to build up and attained the peak during 50-51 MW with highest population of 4.8, 2.3, 1.8 nos. /leaf respectively. However, the bug population increase at the crop maturity stage and maximum population was recorded at 8th MW with a population of 2.4 bugs / plant. The larvae of lepidopteran pests recorded was highest at the fag end of the crop (5th SW), which coincides with the flowering and seed maturity stage of the crop and the predators population at the seed maturity stage of the crop.
The bugs are significantly negatively correlated with both maximum and minimum temperature, however, the maximum RH showed a positive correlation on population build up. Maximum temperature (r= - 0.851) had significant negative correlation and maximum relative humidity had significant positive correlation (r= 0.554) on the lepidopterans pest build up. Spider showed a significant positive correlation with maximum temperature (r=0.455) and minimum temperature (r=0.432) and significant negative correlation with maximum relative humidity (r= -461) and minimum relative humidity (r= -0.563).
The regression analysis of white fly, jassids, aphids, grasshoppers, bugs and larvae with predators implies that with increase in insect pests population the population of predators also increased.
Pages: 245-248  |  466 Views  270 Downloads
How to cite this article:
SK Nayak, Nilambar Khura and RL Moharana. Seasonal abundance of insect pests and natural enemies in sunflower in the Western Undulating zone of Odisha. The Pharma Innovation Journal. 2022; 11(5S): 245-248.

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