How to prevent seedling pests and diseases after heavy rain
Recently, there have been many places in the country that have been raining heavily, and many nurseries have been flooded. After the flood, the seedlings affected by the floods should be rescued as soon as possible to reduce losses. In addition to drainage and dredging, plowing of seedlings, and topdressing of loose soil, the most important seedlings are pest control.
The high temperature and high humidity environment formed after heavy rain provides favorable conditions for the spread of various pests and diseases, such as defoliation, perforation, ring disease, anthracnose, black star disease, pear hibiscus, white star tortoise, scorpion, heartworm, snail, Pests such as dirt (bituminous coal) are prone to epidemic, and it is necessary to add fungicides and insecticides according to specific conditions. Therefore, it is very important to carry out disinfection and disease prevention and sterilization, and the flooded seedlings must carry out a disease prevention and sterilization work.
There are many ways to disinfect, and the agents that inhibit the fungal molds can be used. On the basis of cleaning up the mud and debris of the nursery, a full spray of 0.5% to 1% Bordeaux mixture can be applied to the nursery. In order to avoid the occurrence of hazards, it should be based on early prevention, and the concentration should not be high. It can be sprayed once every 5 days.
If you find a disease, you should use thiophanate or carbendazim to prevent it. Seedlings are susceptible to anthracnose after being immersed, and citrus pomelo seedlings are susceptible to brown rot disease. It can be sprayed with 500 times of chlorpyrifos or 500 times of copper oxychloride and other copper-containing pesticides. Spray on the ground.
If the tree is found to be cracked, the large crack can be filled with pure mud or sand and then wrapped in plastic. Small cracks can be blended with lacquer and sealed with oil. There are seedlings that have flow glue, and the rubber can be scraped off and coated with agricultural anti-120, carbendazim and bactericidal clear. For the treatment of yellowing trees, it is possible to apply multi-micro-fertilizer and ferrous sulfate; roots with decomposed human excrement and 0.5% ferrous sulfate; topdressing with “one applied†phosphorus-potassium complex and Xia's blue soil conditioning Agent, silicon calcium magnesium potash fertilizer, etc.
In addition, the damage can also cause root disease. The first thing to look for is the root of the disease. The whole rotten root should be sawn from the base and brought out of the garden to burn. Secondly, the roots are irrigated with the medicament, and four radiation grooves are used. The crown with a crown of 2 meters can be filled with 20 kg to 30 kg of 50% antibacterial WP 300 times solution and 200 times copper sulfate solution. At the same time, strengthen pest control.
Do the above points, and the damage caused by pests and diseases will generally be minimized.
Commercial Elevator,Commercial Elevators,Building Passenger Elevator,Golden Commercial Elevators
APSL ELEVATOR TECHNOLOGY(SUZHOU) CO.,LTD. , https://www.fujiapsl.com