Pest control techniques in lemon cultivation

Pineapple is a perennial evergreen herb of the pineapple family, each bearing only one fruit in the center. The fruit is cylindrical and grows from many ovaries and flower rachis. It is a compound fruit. Pineapple peel has a large number of flower utensils (commonly known as fruit eyes or pineapple nails), which are hard and tricky and must be peeled off before eating. Pineapple has three fruiting periods in a year, and the best quality is from March to August. Fresh food with fresh fruit color, fruit shape is correct, fruit body is solid, 80% maturity is better. There are three common pineapple varieties: Shenwan, Bali and Sarawak, and the "sugar heart pineapple" carefully cultivated by fruit growers in Guangzhou in recent years is the best.

From September to October, lemon entered the second peak period of the pest red (yellow) spider. The following is the introduction of prevention and control techniques. According to reports, the reasons why lemon trees are attacked by red (yellow) spiders are: first, poor prevention and control in the early stage, improper use of drugs, and no control effect; second, some fruit farmers are not enthusiastic about prevention and control, are not familiar with the technology, or do not control at all. Red (yellow) spiders have high incidence twice a year, one from March to May and the other from September to October. During the spot check in the orchard, if the population density of each leaf reaches more than 2 red (yellow) spiders, control should be carried out. In prevention and control, the same pesticide can only be used twice in the same orchard, and the effect is the best, otherwise, the efficacy will be reduced and the cost will be increased. At present, there are hundreds of pesticides for the prevention and control of red (yellow) spiders on the market, and dozens of chemicals are more or less the same, so drugs should be used alternately or alternately. The efficacy of propargite and nisolan lasted for a long time.

Prevention and control technology should be required to achieve: "early, small, less". "early", that is, the time of prevention and control should be early. When pests are found, they should be treated promptly; "small", that is, when pests are young, they should be controlled without delay; "few", that is, when the number of pests is small, drugs should be used to kill pests so that they cannot reproduce. Be sure to apply the medicine evenly and thoughtfully. Spray the whole plant and don't miss it. Chemicals must be applied according to the "age" of different pests, and alternately or alternately, a good control effect can be achieved.