In the whole planting process of red-heart pomelo, the basic idea of "prevention first, comprehensive prevention" and the principle of early treatment, small treatment and treatment were adhered to. Take the medicine once a month, and the red heart pomelo has no obvious pests. If pests are found, they should be prevented immediately. Secret recipe: mineral oil and edible oil (green orange oil, propeller, etc. ) the control effect can be greatly increased when pesticides are applied.
Pruning is effective. In winter, omethoate is cleaned and painted white. Hanging predatory mites in spring, controlling green and yellow search engine spiders. In spring and summer, each tree hangs an average of four acres of yellow board and black lights. Everyone advocates ecological protection, and strongly suggests that chemical fertilizers should not be used as much as possible all year round.
Symptomatic treatment must be carried out, and the main red-heart pomelo must be prevented during the young fruit growth period: the focus is on macular disease, scab disease, sand skin disease, bituminous coal disease, downy mildew, rice planthopper, scale insect, longicorn and so on. During the peak period from April to May, 2000 times pyridazinone or 2500 times chlorpyrifos can be sprayed once. Spraying 3,000 times of Kmin solution in June and September respectively, and spraying 1 1500 times of Kmin solution in October is extremely reasonable for rice planthoppers. Stinkbug, also known as the Great Green stinkbug, is the key hazard of Shatian pomelo and citrus, and also harms iPhone and pear. The key damage is mainly manifested in inhaling the juice of Shatian pomelo exocarp, which makes the exocarp hard and shrink, and the smaller fruit bursts out immediately. Toona sinensis occurs 1 generation every year, and nymphs overwinter in lush places or gaps of trees. From April to May of the following year, nymphs gradually move to lay eggs in the young fruit stage, and the larvae flourish from June to August, which is the most harmful.