Tobacco Ashfield
The scientific name, morphological characteristics and living habits can be seen in the large grey elephant weevil of cotton fields.
The characteristics of the damage are as follows: The adult gray turdgrass infested the larvae with tobacco in the period from May to June, feeding on tobacco leaves, causing nicks and severely eating up the entire leaves.
Prevention and control methods (1) Take advantage of the suspended animation of large gray elephant worms and their inability to fly and cluster. Pay attention to killing in field management. (2) During the period from May to June when adult insects were damaged, spray 40% acephate EC 900 times or 20% imidophos EC 800 times, 50% phoxim EC 1000 times, 50% Malathion Phosphorus 1000 times. (3) Use 40% acephate EC 0.2 kg, mix in 30 kg of soil to make poisonous soil, 30 kg of poisonous soil per 667m2, obtain good control effect.
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