Prevention methods of scallion pests and diseases

Abstract

The invention discloses a method for preventing diseases and insect pests of allium fistulosum. The method comprises the following steps of conducting intensive soil preparation, removing residues of preceding crops, applying 4-6kg of pesticide of which the Chinese name is called 'Guandaodi' to each Mu of field, constructing ridges, and spraying and applying 20-30kg of an algae microorganism agent to each Mu of field along with water manure; strengthening cultivation management, removing weeds in time, and spraying and applying the algae microorganism agent to improve the disease resistance of allium fistulosum seedlings; eliminating ill residual bodies, cleaning fallen leaves of allium fistulosum in time after each time of artificial seedling regulation to prevent spread and dissemination of pathogenic bacteria, and applying a bactericide once subsequently; and conducting regular prevention and control by using agents, and spraying and applying agents to seedlings in four stages, namely newly sprouted seedlings, seedlings of which the second leaf newly emerges, post-stage medium seedlings and large seedlings to be transplanted. Compared with the prior art, the method has the advantages that most diseases and insect pests which easily occur in the process of industrially breeding allium fistulosum can be prevented, the incidence of allium fistulosum in the seedling stage can be remarkably reduced, the survival rate of allium fistulosum seedlings can be increased, and loss caused by diseases and insect pests can be reduced.

Description

technical field [0001] The invention relates to the technical field of agricultural seedling cultivation, in particular to a method for preventing diseases and insect pests of scallions. Background technique [0002] Scallion is a perennial herb belonging to the genus Allium in the family Liliaceae. It is native to China and is now distributed all over the world. At present, my country's scallion seedlings still adopt the backward open-air seedling cultivation method in the field, mainly using carbofuran, chlorpyrifos and other highly toxic and high-residue insecticides and various fungicides, which do not have the effect of promoting growth and promoting root and seedling growth. Not only the quality of seedlings varies, but also seedling pests and diseases often occur. In the prior art, measures are taken to treat the onion seedlings after they are discovered during actual planting. However, once some diseases are found, they will have a great impact on the growth of onion...

AI Technical Summary

Problems solved by technology

At present, my country's scallion seedlings still adopt the backward open-air seedling cultivation method in the field, mainly using carbofuran, chlorpyrifos and other highly toxic and high-residue insecticides and various fungicides, which do not have the effect of promoting growth and promoting root and seedling growth. Not only the quality of seedlings varies from good to bad, but also seedling pests and diseases often occur

In the prior art, measures are taken to treat the onion after the disease is discovered during actual planting, but once some diseases are discovered, they will have a great impact on the growth of onion seedlings, which are not only difficult to treat, but also cause serious losses.