1. Jiang Yan: Farmers call it a borer. The larvae feed on the ginger seedlings causing their leaves to yellow, and in severe cases can cause the death of the whole plant. Control measures: Fight extinction of adult moth caterpillars, kill larvae, or kill larvae in the first and second instar larvae. The larvae can be seen from the beginning of May, and the period of July and August when the ginger seedlings are in full bloom is the peak period.
Control methods:
The prevention and treatment are better when the larvae are used in the low-intensity period. During the larval period, the pyrethroid pesticide 50g can be sprayed with 300-400kg of water, or 400g of water can be quickly sprayed with 400kg of water. In the evening, it is sprayed on the leaves of the ginger seedlings. When the liquid flows to the stem, it can poison the larvae of the ginger larvae. kill.
2. Jiangyan: It is the main pest during the storage period of ginger. The larva is commonly known as ginger borer and it also harms the ginger in the field, which has a certain impact on the yield and quality of ginger. The ginger larvae have wet and hidden nature, and the newly hatched larvae are ingested subcutaneously with ginger. In the ginger "round head" at the feeders, they are covered with silkworms, insects, and debris, and the larvae are hidden. The larvae are lively, and there are only epidermis, crude fiber, and granular insect feces in the damaged parts of ginger, which can also cause ginger rot. Jiang Yan’s strict requirements on environmental conditions can occur on an annual basis. In particular, when the temperature rises on the Ching Ming Festival, the damage will intensify. The field survey of ginger was killed at a rate of 20-25%.
Control methods:
Pick ginger seeds and found that the damaged ginger is eliminated immediately or soaked with 1.8 times of agarose emulsifiable concentrate 1000 times for 5-10 minutes to prevent pests from spreading from the ginger pit to the field. Ginger people must thoroughly clean the ginger cellar before the pit, spray the pits with 80% dichlorvos 1000 times, you can also put ginger in the ginger heap in the opening of a few bottles filled with dichlorvos solution, you can also put ginger after heating the dichlorvos solution for fumigation. In the field, it is necessary to pay attention to the ginger seed selection, eliminate the damaged ginger, and soak the ginger for 5 to 10 minutes with 80% dichlorvos for 5 to 10 minutes before sowing to kill the pests inside the ginger.
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