Preparation method of insecticide for watermelons

Abstract

The invention provides a preparation method of an insecticide for watermelons. The preparation method comprises the following steps: carrying out decoction after mixing chinaberry roots, chrysanthemum, ephedra herbs and hairyvein agrimony, and filtering a decoction to obtain a filtrate I; uniformly mixing ground surface sludge from a pesticide production plant, activated sludge from a sewage treatment plant and common ground surface soil, and adding the mixture into an inorganic salt culture medium to carry out stationary culture to obtain a mixture II; placing the mixture II into an incubator, and inoculating a microbial colony; placing peeled garlic into a stone mortar, and mashing the garlic by using a stone pestle to form mashed garlic; next, mixing the mashed garlic with absolute ethyl alcohol, placing the mixture into an ultrasonic extraction instrument to carry out ultrasonic extraction, and filtering the mixture to obtain a filtrate, carrying out centrifugal separation by using a high-speed centrifuge to obtain a supernatant, and then, removing superfluous ethanol by rotary evaporation to obtain a garlic extraction concentrated solution; and mixing the mixture I, the microbial colony and the garlic extraction concentrated solution. The insecticide prepared by using the preparation method is capable of killing common underground insects and overground pests and protecting the ecological environment and free of pollution to the watermelons.

Description

technical field [0001] The invention belongs to the technical field of watermelon planting, and in particular relates to a method for preparing an insecticide for watermelons. Background technique [0002] Watermelon ranks fourth among the top ten fruits in the world. my country is a big producer and consumer of watermelon. The annual harvest area of ​​watermelon reaches 2.2125 million hectares, and the production area and consumption account for more than 1 / 2 of the world's total (Sun Xiaowu, Zhang Xian, Ma Yue, et al. Research and Application of Seedless Watermelon in China. Beijing: China Agricultural Press, 2009). Watermelon, as an important high-efficiency economic crop, plays an important role in the adjustment of planting industry structure in my country and the promotion of farmers' wealth and income. [0003] Watermelon is called "the king of melons". It is refreshing and thirst-quenching, sweet and juicy. It is a good fruit in midsummer. Apart from fat and choleste...

AI Technical Summary

Problems solved by technology

[0003] Watermelon is called "the king of melons". It is refreshing and thirst-quenching, sweet and juicy. It is a good fruit in midsummer. Apart from fat and cholesterol, watermelon contains a lot of glucose, malic acid, fructose, protein amino acids, tomato element and rich vitamin C. It is a kind of food rich in high nutrition, pure and safe to eat, but the yield per mu of existing watermelon is not high, and the yield per mu is generally 3000-7000 jins, and the planting of watermelon needs artificial pollination, generally one watermelon Only one mature watermelon can be harvested on the vine, after which the watermelon will become smaller in size and taste worse, and the tap root system of the watermelon, the depth of the tap root is more than 1 meter, and the root group is mainly distributed in the root layer of 20-30 cm, and the roots are slender and easy to break. Weak regenerative ability, intolerant to transplantation

[0004] Most of the watermelon insecticides in the prior art are prepared using chemical components, the preparation method is complicated, and the cost of raw materials is high. Although the insecticidal effect is remarkable, it will cause certain chemical pollution or affect the quality of watermelon