Control methods of ginseng grub
The grub is the larva of the big beetle. It is a gluttonous pest, which can endanger continuously. In general, the soil temperature of 10 cm in the surface layer of soil begins to move at 5 ℃ in spring, and the most suitable soil temperature is 13-18 ℃ on average. When it is higher than 23 ℃, it gradually transfers to the deep soil layer, and then moves to the upper soil when the soil temperature drops to its suitable active temperature in autumn. Daily life in the ground, mainly meshing and eating the tender stems and roots of American ginseng, resulting in lack of seedlings and broken ridges. It is generally not easy to find that most of the roots have been eroded when the leaves on the ground are seen to wilt. Control methods: use pesticides during soil leisure; do not use immature organic fertilizer; artificial capture, when the pest index reaches a certain degree, apply insecticides and irrigate through water.
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Ginseng Blight and its Control
Rain Water is big this year, and the high temperature and humidity are very suitable for the reproduction of ginseng blight. The optimum temperature for the occurrence of ginseng blight is the soil temperature of 10: 30 ℃, the soil temperature of 20: 26 ℃ is the most suitable for the disease, and the disease will stop when the temperature is below 5 ℃ and above 30 ℃. The main pathogen causing ginseng blight is flagellum subphylum, Phytophthora is true.
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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. The general soil begins to move after thawing, mainly harming the underground part of ginseng rhizome by larvae, generally from ginseng root to 10 cm layer on the surface.
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