Also called rice borer Chilo suppressalis, borer, is a Lepidoptera Pyralidae, is the main pest of rice.
Rice stem borer infestation characteristics: damage of rice at causing blight, sheath and withered heart damage seedlings; booting, at heading stage of rice blight, caused by the booting and filling stage, white ear; milk ripe stage damage, half dry spike and insect damaged lines, blighted grain increase in windy, easily fallen.
Rice stem borer occurrence characteristics: after hatching from the leaves up to stalk, or droop silking climb to stalk, bite hole penetrated. If the seedlings are small scattered damage, first causing the blight sheath, created after the dead heart seedling; if the seedlings of coarse, first concentrated sheath medial damage, causing blight sheath. After 2 years of scattered damage began to shift, causing dry sapling. 1 head of larvae can be caused by several strains of blight sapling.
Recommended prevention methods: dosing period should be sufficiently in advance, in Chilo suppressalis hatching peak early medication, each with 10000000000 /ml 667m2 spores Empedobacter brevis suspending agent from 80 to 100 ml versus 45 kg water spray mist. |
