In June 2004, due to the climate and other reasons, some cotton aphids in Kashgar, southern Xinjiang, occurred more severely, which endangered cotton growth and development. In order to protect natural enemies, moxa smoke was used to prevent and treat cotton aphids. Through different concentrations of application tests, the best control effects were explored. First, the test method 1. Mohe tobacco leaf water production method will be 1 kg of unmixed Mohe smoke added 15 kg of water, heating, boiling water after boiling 5 to 10 minutes, cool and filter, that is, the mother liquor, stand-by. 2. Test Design The test consists of 6 treatments, 5x, 8x, 15x and 20x concentrations (made with mother liquor) and CK (fresh water). Area of ​​66.7 square meters, repeated three times. Second, the test results 1. Mohe tobacco leaf water control effect on aphids 2. Mohe leaf water damage to natural enemies three conclusions 1. From the control effect point of view, from 5 times to 20 times the concentration of moconazole smoke The first day after spraying can reach 80%, and the second day can reach more than 90%. On the third day, the water control effect of Momo leaf with more than 10 times concentration can reach 100%. It shows that the higher the application concentration, the faster the insecticidal effect and the higher the control effect. 2. Clear water does not have any preventive effect on aphids. The tussock carcasses that have died without blackening or browning on the front and back of the sprayed cotton leaves. Momo leaf water has no harm to natural enemies such as ladybugs, pupa (larvae, adults, and eggs), and has no lethality. No dead ladybug carcasses were found on the sprayed cotton seedlings and on the ground three days after spraying. From the data from Table 2, it can also be seen that the ladybird larvae on fixed cotton seedlings increased or decreased after three days and remained in the pre-application state. The eggs of the ladybugs had not suffered any damage and hatched on the second day after spraying. 4. In summary, Mohshui leaf water has zero killing power to natural enemies and has the function of protecting natural enemies. It is safe and effective to use the appropriate concentration and ensure the quality of spray during the whole growth period of cotton. It is advisable to apply it in the early stage of locust damage and when the number of natural enemies is small. The application concentration should be about 10 times. Author unit: Kashgar forty-five mission Agricultural Station
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