Control of cotton aphid
Control of cotton aphid
1. Rotate the use of potions. Acetamiprid, imidacloprid, chlorpyrifos and other conventional pesticides in the field are used alternately to reduce the possibility of drug resistance of aphids. Once aphids develop resistance to a certain chemical, even if the times of drug use and concentration are increased, the ideal control effect will not be achieved.
two。 Spray the occurrence site thoroughly. Now cotton is in full bloom, the plant is tall, spraying must be careful, focus on spraying the back of the middle and lower leaves of cotton, strictly prevent missed hit, leakage spray, and effectively ensure the quality of each spray. Because the breeding speed of aphids is fast, it will cause a large number of residual insects if it cannot be sprayed through at one time, which will increase the difficulty of prevention and control next time. Generally, the amount of liquid used per mu is 50-60 kg.
3. Advocate the selection of some new drugs. For plots where the conventional use of acetamiprid, imidacloprid and other traditional agents has no obvious control effect, new agents such as 10% acetamiprid water agent, 20% carbosulfan EC or 10% chlorothioline can be selected to control. General 10% chlorothioline wettable powder 20 grams per mu or 10% enacetamide water 20 milliliters per mu.
4. The medication should be at the right time. During the period of high temperature, we should avoid the noon time and use the medicine in the morning and evening as far as possible, which is better before 10:00 in the morning and after 4 p.m., on the one hand, it can ensure personal safety, on the other hand, it can avoid the rapid evaporation and loss of liquid caused by high temperature, and reduce the efficacy.
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What is the "happy" cultivation of cotton?
The happy cultivation of cotton is to coordinate the relationship between cotton and climate, aboveground and underground, vegetative growth and reproductive growth through artificial measures to actively and predictably regulate the individual development of cotton plants and cultivate high light efficiency plant types under certain conditions. make the best boll setting space in the best boll setting period, so as to achieve the goal of high yield and high quality. SGK321 cotton is a bivalent transgenic insect-resistant cotton, which is obtained by biological breeding and should be a conventional insect-resistant cotton.
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Opinions on the management of cotton incubation period
According to the survey of the city's "715", the growth of cotton in our city is fast this year, and the cotton is growing well. The results are as follows: the growth process is fast, the growth is unbalanced, and the area of peach is large. The average plant height of cotton in the city was 88.38 cm, an increase of 2.01 cm over last year, the total number of fruit nodes was 49.80, an increase of 7.77 over last year, the shedding of buds and bolls was 4.39, 0.15 less than last year, and the shedding rate was 8.8 percent, 1.99 percentage points lower than last year. The input area of peach accounts for 10% of the cotton field area.
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