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In addition to cutting off pests, branches, dead branches, and weak branches, it is also necessary to pay attention to controlling the withdrawal of winter shoots and winter spray of lime sulfur. This will not only help eliminate overwintering pests, but also help flowering results in the following year.
Do a good job of protecting insects and exterminate disease. According to the damage characteristics of pests such as horned cheeked plucked scorpion, thrusher, moth larvae, and tipped moth, spray one time each time new shoots are newly developed and before turning green. When deltamethrin 1000-1500 times or 90% trichlorfon 800 times, the shoots (flower spikes) with pupa symptoms are found. They must be cut and burned in time to capture the larvae and adults of the turtles in time. egg.
In the spring shoot stage or flower bud stage, the prevention and control of litchi pods and other pests should be emphasized. In the fruit period, the prevention of litchi lice and litchi locusts should be the main method, and other pests should be treated. Use 90% trichlorfon 800 times or 10% exterminate 2000 times. Or 90% trichlorfon 800 times plus 25% insecticide double 500 times control.
During fruit development, it is important to pay attention to insect control to reduce fruit drop and worm fruit. During fruit development, fruit pods or fruit worms are often caused by the infestation of locust locusts. According to the forecast and prediction of locust locusts, the timing of the locust infestation starts when the adult eclosion rate reaches 30% to 40%, every 5-7 Heavy spray once a day, be sure to eliminate pests before spawning. In general years, it is the key time for locust control in late June to early July, early July to mid-July, late July to early August, and it should be controlled according to the maturity of the species.
Long-term diseases and pests carry out comprehensive prevention and control
There are many kinds of longan pests and diseases, but they are dominated by five insects 1 diseases such as litchi, longan, moth, litchi, moth, longan, cheekwood, lychee, and longan pteridophoria. And most of them are concentrated on the shoot stage, flowering period and young fruit period. Therefore, the prevention and control strategy should be based on 5 worm 1 disease as the main object, to take effective protection, conservation, and safeguard measures. Focus on the following tasks: