MySheen

Control of thrips in onion field

Published: 2024-11-06 Author: mysheen
Last Updated: 2024/11/06, Thrips are one of the most important pests of green onions. Adult thrips and nymphs use file-sucking mouthparts to harm the heart leaves, tender leaves and buds of the plant, suck up juice, and form many fine silver-white stripes on the leaves. The leaf tip is dry, and in serious cases, the leaves are inedible, which has a great impact on the yield and quality of green onions. The thrips that damage green onions are mainly onion thrips, tobacco thrips and rice tube thrips, which are often mixed, which are in the peak period from May to September. The thrips are small, light yellow to dark brown, and the insect is one year old.

Thrips are one of the most important pests of green onions. Adult thrips and nymphs use file-sucking mouthparts to harm the heart leaves, tender leaves and buds of the plant, suck up juice, and form many fine silver-white stripes on the leaves. The leaf tip is dry, and in serious cases, the leaves are inedible, which has a great impact on the yield and quality of green onions.

The thrips that damage green onions are mainly onion thrips, tobacco thrips and rice tube thrips, which are often mixed. The thrips are in the peak period from May to September, and the thrips are small, light yellow to dark brown. The insect can occur for many generations a year, and adults are afraid of sunlight. They do harm in leaf axils or shade during the day, and feed on leaves only in the morning, night or cloudy days. High temperature and humidity is conducive to its reproduction and harm, drought without rain or not timely watering, its damage is rampant. Prevention and control methods:

The main results are as follows: 1. After harvest, the fallen leaves and weeds of the residual plants in the field and around can be removed and treated in time, which can reduce the source of overwintering insects.

2. Drought is beneficial to the occurrence and damage of the insect, so timely watering can promote the vigorous growth of plants, improve the ability of insect resistance, prevent the spread of insect pests and reduce the damage.

3. In the peak period of adult and nymph occurrence, 10% imidacloprid wettable powder 2500 times and 2.5% pyrethrin EC 2000 times can be selected for prevention and control, and the effect is good.

 
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