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The scientific name of Margoronia indica is Diaphania indica (Saunders),it belongs to Lepidoptera, rice moth families. Another name is Melon testulalis geye moth、Diaphania indica、Cotton rice moth and India melon testulalis geye。
Harm characteristics：Larva of Margoronia indica feed the back of blade,the blade present gray plaques,and the Margoronia indica will spin to let the blades cluster.
Life habits: the numbers of generations happened is different of different regions . Zhejiang happened two generations;Jiangxi happened four to five generations each year. The old familiar larvae in the withered leaf in winter, overlapping of generations, generally the second year April pupate, the first generation of adult emergence in 5 month, and mating laying eggs.7, 8, 9 three months each bug state are seen to. 10 months old familiar larva spins a thin cocoon began to winter. Adult are inactive during the daytime, leafage, weeds in between hide, evening would fly out of the base, strong phototaxis. Imago laying in host plant leaf back, egg powder production or a few grain heap together. Initial hatched larvae feeding host plant leaf back tender meat, 3 age after silking linking blade, or so wrap up and live in among them, when trying to stretch out cephalothorax. Larva pupate in leaf inside.
Recommended prevention and treatment: hatch period, every 667 m2 with 10 billion spore/ml Empedobacter brevis suspending agent 100 ml against the water 40 ~ 50 kg spray mist. |
