MySheen

What pesticide can treat the seedling of flowers and plants to stand withered?

Published: 2024-02-28 Author: mysheen
Last Updated: 2024/02/28, What pesticide can treat the seedling of flowers and plants to stand withered?

What pesticide can treat the seedling of flowers and plants to set off wilt.

Pesticides that can treat the blight of flower seedlings:

(1) Seedbed soil and potting soil must be disease-free new soil or sterile soil. The method of soil disinfection is to irrigate the soil surface with 40% formalin 50 ml/m2 and water 8-12.5 kg/m2, cover it with plastic film for 4-5 days, remove the cover, and sow it after 7-10 days; or to apply the equal mixture of 70% quintozene powder and 80% zineb before planting and sowing, and use 8-10 g/m2 of ground.

(2) Irrigation before sowing or planting, keep sufficient water in the soil, and strictly control irrigation within 20 days after seedling emergence.

(3) At the early stage of seedling disease, watering with 200-300 times solution of Miaogongjunling or 700-800 times solution of thiophane methyl can play a role in sterilization and seedling protection.

seedling blight

Seedling blight is common in nurseries all over China and causes serious damage. Main harm pine, larch, fir, cypress and other seedlings, in a short period of time caused a large number of seedlings died. Some hardwood seedlings can also suffer.

1. Distribution and harm of blight

It often occurs everywhere and can harm broadleaf trees and conifers. In addition to the cypress trees of conifers, which have strong resistance, other diseases will be infected. Conifer damage to the heavy, can harm fir, pine, larch, elm, ailanthus, Chinese toon, sample wood, locust tree and so on.

1. Symptoms The disease mostly occurs in April to June, because the onset period is different, there can be four types of symptoms:

(1) Rotten bud type (rotten type in the ground). 7-10 days after sowing, when the radicle and hypocotyl are born, they are infected by germs, destroy the seed bud tissue and rot.

(2) Damping type (lodging type). Within 60 days after seedling emergence, the tender stem has not lignified, the rhizome of the pathogen invades, produces brown spots, rapidly expands and decays like water stains, and then the seedling lodging.

③ stem and leaf rot type. Seedlings can occur at 1-3 years old. At seedling emergence stage, if the humidity is too high, the seedlings are dense or the mulch is removed too late, the disease infection causes the seedling stem and leaf to rot. Rotten stems and leaves have white filiform matter, dry stems and leaves have small granular mass sclerotia.

 
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