Prevention and control of ginseng infestation

The insect is known as the golden needle worm, also known as the iron filament, the golden tooth rake, the yellow caterpillar and so on, and its adult is also called the kowtow worm. It belongs to Coleoptera, Conchidae. The harm to ginseng is the most serious. In general, the soil begins to move after thawing, mainly harming the underground rhizomes of ginseng with larvae, generally from ginseng roots to the surface of the earth at the level of 10 cm, and most of them do harm at 5-8 cm. Living habits of golden needles often take 3-5 years to complete the first generation, overwintering with all instar larvae and adults. Golden needle bugs prefer relatively low temperatures to high temperatures. In spring, the ground temperature reaches 9 ℃ at 10 cm underground, and the activity begins. In summer, when the soil temperature is above 22 ℃, the larvae sneak into the soil for summer, and the peak period of damage to ginseng is from the first ten days of June to the middle of July. The control of golden needle worms usually begins at 9 ℃ of ground temperature, so it is best to use 15% Avi during this period. Chlorpyrifos (1000G) each generation 6-7 curtain ditch is applied or sprinkled on the pool surface, and then rake it into the ground 3-5 cm; or with lattice (crazy flash) each bottle 7-8 curtain, top rain sprayed on the pool surface, with Rain Water.