Remedy for cotton injury

Cotton malformation caused the growth and development of cotton to be hindered and yield and quality were reduced. The reason for this is mainly due to phytotoxicity.

Field symptoms

After the injury occurred to the cotton plants, the leaves showed chicken claws and the leaves became smaller and thicker. The top stalk is slightly curved, the growth point is developing slowly, and many delicate shoots are produced in the leafhopper. A large number of flower buds fall off, and if it is not remedied in time, it is difficult to take peaches for a long time, resulting in low yield and poor quality.

cause

1. Insufficient cleaning of equipment Due to the rapid development of herbicides in recent years, the number of species has increased and the scope of use has rapidly expanded. In particular, the use of herbicides in wheat has increased. However, some farmers only had one sprayer. They did not clean the equipment in time after spraying the herbicide on the wheat field, and sprayed the cotton herb with the herbicide residue to cause injury.

2. The concentration of pesticides used by most farmers when using pesticides to control pests and diseases can not be specified in accordance with the instructions

The use of the concentration, arbitrarily increase the concentration, resulting in the occurrence of phytotoxicity.

Remedy

1. Cleaning prevention method Spraying the sprayer immediately after spraying the wheat field herbicide should be repeated. The sprayer should be washed several times before spraying other pesticides to prevent the injury caused by the herbicide residue.

2. If the water spray cleaning method is found in time, immediately spray clean water, spray each time in the morning and evening, and spray for 3 to 4 days, which can effectively control the development of drug damage and reduce the damage caused by phytotoxicity.

3. The Hormone Relief Act In the event of a phytotoxicity, the hormonal plant growth regulators should be sprayed in time to relieve the phytotoxicity and promote the growth. The general spraying concentration is 40 micrograms/ml solution.

4. After the replenishing of fertilizer to promote seedling injury, the plant growth and development is hindered, nutrition should be given in time. First, foliar spray fertilizer can be sprayed with nutrients for drought-resistant growth to quickly supplement nutrients. Second, soil topdressing can be applied with 5~6 kg of urea per acre to promote plant growth and reduce the degree of injury.

5. The cultivator loose soil method for cultivating loose soil, breaking the soil compaction, enhance soil permeability, promote beneficial microbial activities, accelerate the decomposition of soil nutrients, enhance root absorption of nutrients and water, so that plants restore growth and development as soon as possible, reduce drug Damage caused.

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