Biological pesticide for preventing and controlling strawberry powdery mildew and preparation method

Abstract

The invention discloses a biological pesticide for preventing and controlling strawberry powdery mildew. The biological pesticide is prepared from traditional Chinese herbal medicaments cloves, fallopia multiflora, celosia cristata, radix ranunculi ternati, sharpleaf galangal fruits, polygonatum, camptotheca acuminata and coral head plant seeds. The biological pesticide is biologically measured to have a strawberry powdery mildew germ suppression rate of over 80 percent and remarkable effects; a field test shows that prevention and control effects on strawberry powdery mildew after the pesticide is applied for three times are 60 percent, 70 percent and 80 percent respectively, are better than 50 percent carbendazim, and tend to be improved along with the increase of pesticide application times, and the biological pesticide can act for a long time.

Description

technical field [0001] The invention belongs to the technical field of biological pesticides, in particular to a biological pesticide for preventing and treating strawberry powdery mildew. Background technique [0002] Strawberry powdery mildew is an important disease of strawberry cultivated in open field and protected field, and improper control will cause serious damage. Strawberry powdery mildew mainly damages leaves, petioles, flower buds, fruits, and fruit stalks. In the early stage of the disease, white filamentous mycelium occurs on the back of the leaf, and then forms a white powder. When the damage is severe, the leaf edge rolls up and scorches, and the petals turn red after being damaged. After the fruit is damaged, the surface is covered with white powder, and the swelling stops and the coloring is poor. . The disease is severe when the temperature is below 20°C and the humidity is above 60%, but it is also prone to occur in case of excessive drought. Strawber...

AI Technical Summary

Problems solved by technology

At present, 4% Domeco water solution, 50% carbendazim, and 30% Teflon wettable powder are commonly used in prevention and control, but due to repeated use, they can inhibit the growth of strawberries, and they are not suitable for use during the flowering period.

Although the control of chemical agents has a certain control effect, due to the extensive use of chemical pesticides, various harmful bacteria have developed drug resistance, which has increased the difficulty of control, and at the same time caused harm to the plants themselves. There are residues in it, endangering people's health and polluting the environment

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