Illiberis pruni also known as pear dog son, dumplings bug is lepidoptera, spot moth section, is the main food of pear leaf pests. To larvae feed on flower bud and leaf, in addition to harm the pear tree, but also harm the apple, Chinese flowering crabapple, peach, apricot, cherry and crabapple and fruit trees.
Adults: 9 ～ 12mm in body length, black. Wings black, translucent, wing margin darker. Egg: flat elliptic, long 0.7mm, primiparous milky white, close to hatch. Larva: the mature larva is about 20mm long, white, fusiform, from the thoracic to abdominal section eighth back sides each have 1 round black spots, each section of the dorsal and stellate tumors 6. Pupa: body length of about 12ram, fusiform, beginning late pale yellow, dark brown.
Northeast, China north each year took place a generation, Henan, Shaanxi every year from 1 to 2 generation occurs, Sichuan occur each year generation. In 2, the 3 instar larvae in the trunk of cracks and thick leather tie white thin cocoon overwintering. The following year early spring budding started was activity, harm, bud and leaf bud. Leaf, larvae spin silken with leaf is dumpling shape, latent bracts harm. Larval life hazards of 7 - 8 leaves, the old cooked in leafy bracts pupate pupae period, about 10 days. Adult day night static volt, mating and oviposition, egg fertility on abaxial leaf surface with irregular lump, eggs after 7 to 8 days after hatching larvae, grow to 2 ～ 3 age began in winter.
Recommended prevention technology: each 667m2 with 10000000000 /ml Empedobacter brevis spore suspension agent 100 ml versus 50 kg water around the blade is opposite spray mist. |
