Scientific name Alucita niveodactyla Pagensteeher is a Lepidoptera, feather moth family. Alias ​​white bird feather moth. Distributed in Southeast China, South China, Taiwan and other places.
Host sweet potato.
The characteristics of larvae larvae feeding sweet potato vine leaves, but do not sneak into the unexplored leaves damage, eating marks into mesh holes or cause the leaves perforated or dry, affecting the growth and development. Morphological characteristics Adult body length 8mm, wingspan 18mm, the whole white dense white Scales, forewings, hind wings like white bird feathers, forewings from the fin base 2/5 is divided into two, which are mixed with 2,3 black spots, Rear end roll; 3 rear wings, white scales on the periphery. 4-7 abdominal plane on both sides of the abdominal surface with black spots l pairs. Slender feet, hind feet are particularly prominent. Egg length 3.5mm, flat oblong, light blue. The larvae were 5 instar. The last instar larvae were dark green when they were old and mature. The body length was about 10 mm. Each section was born with hairy tumors. There were 4 pairs on the chest, mid-thoracic and posterior thoracic nodes. There are 5 pairs of each, and the bristles have bristles. The length is 10mm and the head is flat. There are 2 pairs of tumors on the back of the body and 3-4 purple spots. The whole apple is green.
Habits of life 5-6 generations, with larvae or a few larvae in the potato leaves overwintering or winter overwintering. Juvenile larvae appeared in potato fields in June-July of the following year, especially in autumn, and it was still visible in the field in late December. The mature larvae prefer to defoliate on dead leaves or fresh sweet potato leaves. After emergence, the adults fly in the potato field during the day and mate on the day of eclosion. After 2-3 days, the eggs are produced on the dorsal side of tender leaves, yields or 2 - 3 tablets together. It takes more than 20 days to complete a generation. Hi cold weather.
Control methods (1) When the population density of potato field is not large, no separate control is required. (2) If necessary, spray 5% Ruijinte Suspension, 50-100ml per 667m2 of medication, good control effect, and can also be used to treat sweetpotato moth and sweetpotato larvae.
Ningbo Cland Medical Instruments Co., Ltd. , https://www.ruipumedical.com