Bactericide with walnut green seedcase extract and method for applying bactericide to preventing and treating capsicum root rot

Abstract

The invention relates to the field of agricultural technologies, in particular to a bactericide with walnut green seedcase extract. A method for preparing the bactericide includes (1), preparing the walnut green seedcase extract, to be more specific, selecting fresh walnut green seedcases, thoroughly washing the walnut green seedcases, then placing the walnut green seedcases in a constant-temperature tank, drying the walnut green seedcases in the constant-temperature tank at the temperature of 40-45 DEG C, grinding the walnut green seedcases, sieving the walnut green seedcases via sieves withthe sizes of 60 meshes to obtain dry powder, adding the dry powder into petroleum ether, extracting the dry powder for 3-5 day by three times, combining extract liquid obtained by three times of extraction and carrying out vacuum concentration by the aid of rotary evaporation instruments to obtain the walnut green seedcase extract; (2), preparing the bactericide, to be more specific, sequentiallyadding emulsifiers, 0.2% urea, 0.2% zinc sulfate and 0.2% of potassium dihydrogen phosphate into the walnut green seedcase extract obtained at the step (1), and preparing liquor with the concentrationof 2000 mg / L by the aid of sterile water. The liquor is the bactericide. Compared with the prior art, the bactericide has the outstanding advantages that the bactericide is safe and environmentally friendly and is low in cost and convenient to use; the bactericide is stable in efficacy, high in fast-acting property and long in lasting period when used for treating capsicum root rot, and growth ofplants can be promoted by the bactericide.

Description

technical field [0001] The invention relates to the technical field of agriculture, in particular to a walnut green husk extract fungicide and its application method in preventing and treating capsicum root rot. Background technique [0002] Pepper root rot mostly occurs after planting. In the early stage of the disease, the branches and leaves of the diseased plants, especially the top leaves, wilted slightly, and recovered from the evening to the next morning. After the symptoms repeated for several days, all the leaves wilted, but the leaves were still green. The rhizome and root cortex of the diseased plant are light brown and dark brown and rotten, which are easily peeled off to expose the xylem. Observation of the cross-section stem shows that the microtubule bundles turn brown, and a white to pink mold layer can be seen on the diseased growth when it is wet in the later stage. The pathogenic bacterium of pepper root rot is Fusarium solani, which can survive in the ...

AI Technical Summary

Problems solved by technology

However, there has been no report about the compound preparation of repelling diseases, preventing insects and nutrition with walnut green bark extract as active substance