Preparation method and use method of plant protective agent

Abstract

The invention relates to a preparation method and a use method of a plant protective agent, and belongs to the technical field of plant protective reagents. The plant protective agent is prepared by taking streptomyces lydicus, cane sugar, yeast extract, magnesium sulfate, monopotassium phosphate and manganese chloride as main raw materials. The streptomyces lydicus plant protective agent is prepared by taking streptomyces lydicus strain fermentation liquor, confirming that the nutrient cell concentration of each milliliter of the fermentation liquor is over 10<^>7 cfu / ml, inoculating the fermentation liquor to cooked rice serving as a main carrier, carrying out constant-temperature culture for 48 hours, and drying moisture to be below 10 percent at the low temperature of 40 DEG C to obtain the streptomyces lydicus plant protective agent. The preparation method of the plant protective agent is scientific and reasonable in process design, low in preparation cost, simple in process, easy to control and suitable for popularization and application.

Description

technical field [0001] The invention relates to the preparation and application method of a plant protection agent, which belongs to the technical field of plant protection agents. Background technique [0002] Due to the increasing severity of soil-borne diseases in recent years, bacterial wilt is the most serious on Solanaceae such as tomatoes. Bacterial disease invades from root or stem base wounds, and spreads in the vascular tissue of the plant, causing blockage of vascular bundles, inability to transport nutrients, cell poisoning and plant withering and death. Because the pathogenic bacteria can hide in the soil for several years, even the use of pesticides cannot effectively kill the pathogenic bacteria, and excessive use of pesticides will cause harm to the environment and one's own health. From the perspective of bacteria, the fundamental solution is to inhibit the growth of pathogenic bacteria and prevent them from causing harm to crops through prevention rather t...

AI Technical Summary

Problems solved by technology

Cross-cut fresh diseased stems, squeeze them with your hands or insert them into clear water, and milky white bacteria can be seen overflowing, which is the main feature of the disease The flow of shoes, agricultural machinery, and irrigation water also have the opportunity to carry pathogenic bacteria for transmission, and pathogenic bacteria can survive in the soil for several years for a long time. Ralstonia solanacearum can be colonized in the soil through natural openings in the roots or due to transplantation, Invasion and infection of wounds caused by nematodes, insects, or other physical damage, and if the knife carries R. solanacearum bacteria and then prunes healthy plants, it can be infected through the pruning wound, which brings great harm to tomato cultivation. Caused more than 30-50% loss to tomato farmers, or even no harvest

[0005] Now there is no suitable solution for tomato bacterial wilt. It is generally recommended to use pesticides, copper oxychloride (Copper oxychloride) 81.3% wettable powder, but the effect is not good, and it has respiratory toxicity and toxicity to aquatic animals.

Moreover, the application of pesticides cannot effectively kill the R. solanacearum bacteria in the soil, so it is a method to treat the symptoms but not the root cause