Gualou, also known as melons, melons, melons and wild plants. From August to September, the temperature was high, and the amount of rainfall was relatively small and serious. Major hazards melon, cucumber and other Cucurbitaceae vegetables can also harm tomato, eggplant, potatoes and so on. The larvae take the leaves of the cucurbitaceae and can spin the leaves and turn them around. The larvae are harmed within the leaf roll. In severe cases, only the leaf veins remain until the fruits and vines are invaded, seriously affecting the yield and quality of the fruits.
The worm is endangered by larvae from May to June. The peak period of larval occurrence: the second generation is in the middle and late July, the third generation is in mid-August, the fourth generation is in early September, and the fifth generation is in early October.
Because Gualou has its habit of protection, its larvae are difficult to control after the third instar, so it must be prevented and treated before the second instar larvae. The melon vegetables have certain compensation ability to the melon borer. When the average density of each larva of the melon leaf is less than 0.1, the yield of melons generally has little effect. When the average density of each larva of larvae is more than 0.1, it can be used as a control index of quails and should be controlled by spraying.
Chemical control should be carried out in the 1st to 3rd instar larvae stage, with 5% Ruijinte 2000x, 0.5% avermectin 2000x, 50% phoxim 2000x, or 25% dimehy Aqueous agent 500 times, or 20% cypermethrin EC, or 20% fenvalerate EC 4000 to 5000 times alternating spray. Spray once every 7 days to 10 days and spray 3 times. In general it should be sprayed in the evening or around 8:00 am. The front side of the blade, the melon surface and the stalks are sprayed to the liquid, so that spraying uniform, thoughtful, leaking spray, have better control effect. Note spray before safety intervals. (Author: Alex Chen Xuan Di Unit: Heshan District of Yiyang City Bureau of vegetables)
The worm is endangered by larvae from May to June. The peak period of larval occurrence: the second generation is in the middle and late July, the third generation is in mid-August, the fourth generation is in early September, and the fifth generation is in early October.
Because Gualou has its habit of protection, its larvae are difficult to control after the third instar, so it must be prevented and treated before the second instar larvae. The melon vegetables have certain compensation ability to the melon borer. When the average density of each larva of the melon leaf is less than 0.1, the yield of melons generally has little effect. When the average density of each larva of larvae is more than 0.1, it can be used as a control index of quails and should be controlled by spraying.
Chemical control should be carried out in the 1st to 3rd instar larvae stage, with 5% Ruijinte 2000x, 0.5% avermectin 2000x, 50% phoxim 2000x, or 25% dimehy Aqueous agent 500 times, or 20% cypermethrin EC, or 20% fenvalerate EC 4000 to 5000 times alternating spray. Spray once every 7 days to 10 days and spray 3 times. In general it should be sprayed in the evening or around 8:00 am. The front side of the blade, the melon surface and the stalks are sprayed to the liquid, so that spraying uniform, thoughtful, leaking spray, have better control effect. Note spray before safety intervals. (Author: Alex Chen Xuan Di Unit: Heshan District of Yiyang City Bureau of vegetables)
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