Rice skipper butterfly ( Rice shell pest ) also known as rice skipper, bract leaf beetle, is a Lepidoptera Hesperiidae, damage, mainly rice, but also damage the variety of gramineous weeds. Larvae spin silken with leaf Chengbao, and nibble, ranging from a notch, while eat leaves. Serious occurrence, but will complete field, even a paddy rice leaf eating.
Description of early damage, white ear production, advanced against consumption of leaves, causing leaf area is decreasing, rice filling is not full, 1000-grain weight and low, serious reduction of output, more serious is the harm to rice grains appeared, black divided disease increase, harvest rice grains with disease, processing of black powder is not easy to remove, directly affect the rice quality, creates the economic loss, a threat to the health of consumers. Before heading to grain damage, curl, cannot extract, or by turns, can blossom and bear fruit, affects the yield.
Larvae spin silken with even number of leaf rice into bud, hide, nibble blade, serious when can eat, rice leaf, also often make rice cannot stick. One or two age at the edge of a notch near the tip of the bite, and then spinning the leaf margin rolled into a small bracts, since three old, with increasing the blade, is generally 2 to 8 pieces of leaves with Yibao. A head to eat more than 10 piece of leaves of rice, after age 4 increased food intake, feeding amount for a lifetime of over 93%, it should be at the age of 3 treatment before the peak period.
Mature larvae pupate pupae in bud, bud ends tightly, spindle-shaped.
Recommended prevention methods: General in the tillering stage of rice per 100 plexus worm 5 above, or in the round straw period every hundred plexus rice worm 10 above, each with 10000000000 /ml 667m2 spores Empedobacter brevis suspending agent from 80 to 100 ml versus 45 kg water spray mist.
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