Generic omphisa anastomosalis (guen6e)
Synonyms omphisa illisalis (walker)
Lepidoptera, Pyralidae.
Stupid borer alias potato, sweet potato stupid moth, sweet potato vine head worm.
Distribution of Fujian, Taiwan, Hainan, Guangdong, Guangxi.
Host potato, sand and Convolvulaceae vine plants.
Immature insects into the damage characteristics in potato stem damage, resulting in the formation of swollen hollow stems thin worm, affecting nutrient transport, causing wilting, affecting growth and development.
4-5 years old living habits on behalf of Guangdong, to mature larvae or residues in potato tubers during winter and winter, next spring and pupate in mid-March on, 3 months, occurred late into the adult period. In early April, took the first one in mid-May, a second generation in late May early July, three generations of 7 to 8 mid-mid, four mid-September on behalf of a late October, early November, took 5. Adult hidden during the day and night activities, a phototaxis, mating and oviposition night after emergence, 6-7 days of spawning, egg production in bulk shoot, petiole, or stem forking at the individual not fresh in a row, 4 eggs -10 days. Newly hatched larvae from the petiole, leaf bud, stem, drill into harm. Spear penetrating from the larvae bore into the damage over time and then climbed out of the main stem damage, the larvae down Zhusi hi, after aging under constant drill stem or rhizome surface at, and some drilling to tubers in the. Victims of adult stem swollen at the gall, often emit insect feces, is to identify important characteristics of the pest. Mature larvae near the soil surface after the stem base at the end of white or yellow Zhukong thin cocoon pupate. A natural enemies macular step (pheropsophus sp.), Phnom Penh, a green step (collerdasp.), black spots tumor borer Ichneumonidae, (xanthopimpla stemmator thunberg) and so on. Control methods (1) promptly after the closing clean potato garden, reduce overwintering insect population base. (2) rotation. (3) potato seedlings chemical treatment. 1-2 days before transplanting seedlings cut by 40% Dimethoate EC 1000 times or 90% of the crystal trichlorfon, dichlorvos 80% EC 800-900 dilution of the seedbed liquid spray or dip seedlings dimethoate 1 - 2 minutes after the cutting. (4) 5-7 days after peak adult emergence, spraying the insecticide. (5) the unfertilized female moths 1-2 head mounted on the lure insect traps, the trapping in the adult period Sheng effective. |
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