Pollution-free bactericidal composition for preventing and treating cucumber downy mildew and application method thereof

Abstract

The invention discloses a pollution-free bactericidal composition for preventing and treating cucumber downy mildew, which comprises the following components in parts by mass: 20-30 parts of urea, 20-30 parts of white sugar, 20-30 parts of monopotassium phosphate and 20-30 parts of skim milk. An application method of the pollution-free bactericidal composition for preventing and treating cucumberdowny mildew comprises the following steps: diluting the bactericidal composition with water in use: when the number of leaves of a plant is less than seven, adding 200 volume of water into the bactericidal composition for dilution for use; and when the number of the leaves of the plant is at least seven, adding 100 volume of water into the bactericidal composition for dilution for use. The bactericidal composition for preventing and treating cucumber downy mildew and the application method thereof have the following beneficial effects: 1, tests show that the bactericidal composition can prevent more than 85% of cucumber plants from being infected by downy mildew while improving the carbon-nitrogen ratio and trace elements of the plants; and 2, no pollution is caused.

Description

technical field [0001] The invention belongs to the field of crop planting, and in particular relates to a pollution-free bactericidal composition for preventing and treating cucumber downy mildew and a use method thereof. Background technique [0002] Cucumber downy mildew, commonly known as "happy horse dry" and "dry leaves", can damage adult plants at the seedling stage, mainly damages leaves and stems, and less damages tendrils and pedicels. [0003] Cucumber downy mildew is the most common and serious disease in cucumber cultivation in protected areas. The disease has the characteristics of fierce onset, severe onset, and rapid spread. If it is not prevented and controlled in time, it will cause devastating losses to cucumbers. [0004] Cucumber downy mildew mainly occurs on leaves. Onset at the seedling stage, chlorotic spots appear at first on the cotyledons, and gradually turn into irregular yellow spots. When the cotyledons are wet, a gray-black mold layer is form...

AI Technical Summary

Problems solved by technology

[0007] At present, most of the drug combinations for the control of cucumber downy mildew contain a large amount of pesticides. The use of pesticides will not only cause certain harm to the staff and the environment, but also easily leave pesticide residues on the surface of cucumbers.