Plant-sourced bactericide for controlling bacterial wilt of tobacco

Abstract

The invention belongs to the technical field of agricultural chemicals, particularly relates to the field of plant-sourced bactericides and specifically provides a plant-sourced bactericide for controlling bacterial wilt of tobacco. The main active constituents of the plant-sourced bactericide for controlling bacterial wilt of tobacco are amaranth crude extract and sterile water, wherein each milliliter of the plant-sourced bactericide contains 0.17-0.5 mg of the amaranth crude extract. The plant-sourced bactericide for controlling bacterial wilt of tobacco has the advantages as follows: 1, the raw material of the amaranth crude extract is convenient to obtain and the amaranth crude extract can be produced industrially and can be applied by farmers; 2, the effect of the plant-sourced bactericide is obvious and the median inhibitory concentration EC50 is 0.0415 mg / mL; the effect of the plant-sourced bactericide for controlling bacterial wilt of potted tobacco is 77.00-90.29 percent andis obviously higher than the effects of streptomycin sulphate and other conventional plant-sourced bactericides for controlling bacterial wilt of tobacco; and 3, the amaranth crude extract is high inefficiency, low in toxicity, nuisanceless, and safe to environment.

Description

technical field [0001] The invention belongs to the technical field of pesticides, in particular to the field of botanical fungicides, in particular to a botanical sterilization for preventing and treating tobacco bacterial wilt. Background technique [0002] Amaranth is an annual herb that feeds on tender stems and leaves in the family Amaranthaceae (Amaranthaceae), rich in various nutrients. There are about 40 species of Amaranth in the world, and more than 20 species in my country, which are widely distributed. They are native to the tropical and subtropical regions of Central America and Southeast Asia. China is also one of the origins of Amaranth. There are two main types of amaranth, the vegetable amaranth, in which the leaves are eaten as a vegetable, and the grain amaranth, in which the seeds are harvested, originating in Central or South America. The main species of vegetable amaranth is Amaranthus tricolor, which originated in South Asia or Southeast Asia and grad...

AI Technical Summary

Problems solved by technology

[0006] At present, for this disease, agricultural measures such as paddy and dry crop rotation and lime disinfection during the off-field period are mainly used for prevention and control in production, but the paddy and dry crop rotation is easily restricted by the environment and cultivation conditions, and it is difficult to implement; Although lime can relieve the condition, it is easy to cause soil compaction

Breeding for disease resistance is also facing great difficulties

People try to screen some antibiotics for the control of R. solanacearum, such as streptomycin, tetracycline, penicillin, actinone, etc., but the effects are not satisfactory

In terms of chemical control, although many chemical agents with good inhibitory effects on R. solanacearum have been screened out through indoor toxicity testing, the control effect is unstable and it is difficult to control the disease. So far, no chemical pesticide can effectively control the disease. The occurrence of bacterial wilt

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