Paddy borer to mature larvae in rice stubble surface under basal culm in second years, raising during pupation ( moth ). The adult has very strong green trend, phototaxis, daytime latent in the seedling lower, was alarmed when rapid fly straight away, evening activity, or mating and oviposition. A female moth oviposition of at least 1, up to 5 blocks, 300 grains of about. The egg mass is long elliptic slightly flat, prolific in upper leaves early, milky white, mature, grayish black, covered by a layer of brown hair, like a half grain of moldy soybean. Hatched ant moth along the blade sheath bore into the leaf stems basally, or rapidly climbed the tip droop silking, blowing to nearby plants, from the sheath slot bore into the bite, young stem and leaf, the leaf inward-curl, resulting in " dead heart ".
At booting stage of rice is nibbling at the tender spike, after heading and bore into the upper stem section crown football betting net causing white ear. In general, the larvae from the hatch to bore into the stem rod only needs 20～30 minutes. Unfavorable environmental conditions, the larvae may be dying in large numbers. Rice in tillering and booting stages is most beneficial to the larvae bore into the, to suffer the most. Round rod and after full heading of tissues and organs is hard, not easy to bore into the larvae.
Recommended prevention methods: usually, rice breach period often with yellow rice borer egg hatching peak to meet, so rice false spraying prevent borer into rice grains formed white, white grain ear damage critical period, each with 10000000000 /ml 667m2 spores Empedobacter brevis suspending agent with water spray mist around 45 kilos. Miss this one period, borer larvae bore into the rice grain after the drug prevention effect is not good.
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