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2. (Melon) Thrips: Adults can fly well, but they can also spread by the wind. At the same time, their reproduction speed is extremely fast. Therefore, they are prone to disasters. The climatic conditions of high temperature and low humidity are particularly suitable for their damage. The quail horses tend to be tender and tend to focus on the backs and tenders. Pharmacological control options: 5% Ruigente suspension 2000 times or 70% of the Aileen or 20% Ayurveda 5000 times and so on, alternating use, continuous spray 2 to 3 times.
3, Gualou: The insect is generally intermittent in the hot season, mainly melons (such as watermelon, loofah, etc.) of the melon leaves and melon, commonly known as "plankton." The larva body has two distinct white dorsal lines on its back. Chemical control: Select 5% Ruijinte 1000 ~ 1500 times for even and thorough spray, with good control effect.
4, nocturnal insect pests (Spodoptera exigua, Spodoptera litura): the prevention and control of nocturnal moth insect pests are generally based on stomach poisoning, so the spray must be thoughtful, the amount of water spray should be sufficient, and medication in the young age. The control agent can be used for 15% 4% hits or 20% worms dead 800 times, etc., and it can be used as a good ovicidal agent when mixed with Wanling or Fu Rui.
Occurrence and Control Measures of Watermelon Pests in High-temperature Seasons
1. Starscream (Cucumber Leafhopper): Starscream is a kind of hi-temperature and low-humidity pest. In March-April, we usually feed on weeds or other hosts. In the first half of May, we began to move into the hazards of melon fields. In June, the breeding rate began to increase, and the number rose to the end of June. The damage was most serious. Control agents can be used: 50% Torque 3000 ~ 4000 times or 20% of fruit 1500 times special or 1% of insects killing star 1500 times spray.