Early Spring Vegetable Seedlings Beware of Tigers
Ground tigers can harm all vegetable seedlings, with beans, solanaceous fruit, melons and cruciferous vegetables being the most affected. Especially in the early spring, vegetable fields and surrounding weeds can provide sites for spawning. Larger insect sources will be formed and serious damage will occur. The tiger larvae often cluster on the back of the heart or leaves of the seedlings and bite the leaves into small nicks or meshes. After 3rd instar, the larvae bite off the stalks of the vegetable seedlings near the ground. They often drag the bitten seedlings into the hole. The upper leaves of the larvae are often exposed outside the hole, causing the whole plant to die, causing the lack of seedlings to break the ridges and destroy the seedlings. Its prevention and control methods are as follows: 1. Agricultural control. Remove weeds in and around the greenhouse to prevent adults from spawning inside and outside the greenhouse. For those who have already spawned and found 1 to 2 instar larvae, spraying and then weeding should be done first to avoid hiding the individual larvae. The weeds removed should be kept away from the vegetable fields and destroyed or composted. 2. Temptation. One is to seduce adult insects with black light. The second is to kill adults with sweet and sour liquid, that is, with 6 parts of sugar, 3 parts of vinegar, 1 part of white wine, 10 parts of water, 9 parts of trichlorfon and mix thoroughly, or add appropriate amount of pesticide with pickle water, set in the adult stage. Third, bait traps adult worms. First stir the bait (grain, wheat bran or corn crumb) 5 kg, and then use 90% trichlorfon 30 times liquid 150 g mix, add the appropriate amount of water to mix the tide for the degree, with 1.5 to 2.8 per mu Kilograms, spread the field in the windy and sweltering evening. 3. Manual capture. In the early morning, the top soil near the seedlings can be removed and the latent old larvae can be caught. The effect is good for several consecutive days. 4. Chemical control. The 1st to 3rd instar larvae of ground tigers have poor resistance to insects and are exposed on host plants or on the ground, which is a suitable period for chemical control. The use of 2.5% deltamethrin EC solution 3000 times or 90% dipterex crystal 800 times solution can be used for spray control. Disclaimer: Some articles in this website have been transferred from the Internet. If you are involved in third party legal rights, please inform this website. phone Portable Cable Reel,Garden Water Hose Reel,Retractable Garden Hose Reel,Wall Mounted Garden Hose Reel NINGBO QIKAI ENVIRONMENTAL TECHNOLOGY CO.,LTD , https://www.water-hose-reel.com