Whitefly is a small white insect that is hard to be distinguished by naked eyes. At the same time, the plants will see homomorphs of different periods: adults and larvae. Adults mainly harm the young leaves and absorb the juice of the mesophyll; larvae mainly adhere to the back of the leaves and prick to absorb the juice, resulting in the leaves curling and drying up. In addition, the leaves and branches released by whitefly will pollute the leaves, which is easy to cause soot disease.
If insect pests are found, spray chemicals in time, 40% Omethoate, once every 7 days, three to four times in a row. When spraying, note that both sides of the blade should be sprayed, especially on the back, there will be a large number of insects.
At ordinary times, strengthen maintenance, pay attention to ventilation, and spray fungicides once a month.
Aphids and spiders are small and hard to distinguish with the naked eye at the beginning of the disease. But you can't imagine that insects as small as a few millimeters will let a plant of tens of centimeters fall in a short time. Don't look down on them! The insects will stab and suck the leaves, buds and flower leaf liquid, which will affect the normal growth and development, not only affect the beauty, but also cause the whole plant to die in serious cases.
In the process of maintenance, the environment is very important. Frequent ventilation can ensure the environment is clean, increase the application of phosphorus and potassium fertilizer, enhance the disease resistance of plants, and reduce the occurrence of pests to a certain extent.
When there are a few aphids or spiders on the plant, they can be rinsed with water (or scrubbed with soapy water). Spray 1:1000 times of dimethoate solution in severe cases.
