Biological control method for powdery mildew of strawberries

Abstract

The invention provides a biological control method for powdery mildew of strawberries. The method comprises the steps that 0.2%-0.5% by mass ground ottelia alismoides leaf fluid is prepared and placed in the low-temperature shadow to be sealed and stored for use; for the first stage, in February and March of the Gregorian calendar, the ground ottelia alismoides leaf fluid is applied to soil of a strawberry garden and strawberry plants at least once; for the second stage, in the strawberry flowering phase, the ground ottelia alismoides leaf fluid is applied to the strawberry plants at least once; for the third stage, in the strawberry green fruit stage, the ground ottelia alismoides leaf fluid is applied to the strawberry plants at least once; for the fourth stage, in the strawberry red fruit stage, the ground ottelia alismoides leaf fluid is applied to the strawberry plants at least once, and then the powdery mildew of the strawberries can be effectively controlled. According to the biological control method for the powdery mildew of the strawberries, the purpose of controlling diseases can be achieved, and the making method is simple, low in cost, more natural and more environmentally friendly; ottelia alismoides has the effects of clearing heat, removing toxicity, expelling phlegm to arrest coughing, treating asthma and the like and is beneficial for body health of people, and environmental pollution is reduced.

Description

technical field [0001] The invention relates to the field of plant protection and biological control of plant diseases, in particular to a method for biological control of strawberry powdery mildew. Background technique [0002] Strawberry powdery mildew is caused by the infection of the fungus Ascomycota subphylum Sphaerothecaaphanis. It is one of the main diseases in the growth of strawberries. When it occurs seriously, the diseased leaf rate is over 45%. The diseased fruit rate is more than 50%, which has seriously affected the yield, quality and economic benefits of strawberries. . [0003] Harm symptoms: Strawberry powdery mildew mainly harms leaves, petioles, flowers, pedicels and fruits, and rarely occurs on stolons. When the leaves are infected, a thin layer of white mycelium grows on the back of the leaves at the early stage of the disease. As the disease progresses, the leaves curl up and become spoon-shaped, and produce dark spots of various sizes. Later, the sp...

AI Technical Summary

Problems solved by technology

However, the long-term and large-scale use of chemical agents has caused various harmful bacteria to develop drug resistance, which has increased the difficulty of prevention and control; at the same time, there are residues of chemical agents in strawberries, which endanger people's health and pollute the environment.