1, citrus red spider.
With the gradual decline in temperature, the high temperature period has passed, and it is suitable for the breeding and harm of citrus spiders. Second time in autumn
The peak period is approaching. Timely attention was paid to the occurrence of dynamics of red spiders in the field. When the average number of insects per leaf was 3-5, the control was sprayed.
Pharmacy chooses highly effective and low-toxic quinones, SK mineral oil, triazotin, insect killer (avermectin), and dying net. According to drug source selection, rotation of medication.
2, citrus rust. There are many generations, rapid reproduction, and serious damage. Always pay attention to the pest situation and check the fruit with a hand-held magnifier. If you find that there are about 10 insects per fruit, spray them immediately. If you miss the appropriate period of control, it will produce copper nuts, which will reduce the quality of the fruit and will not be able to recover economic losses.
The insecticides include insect killer, killer spirit, Dasheng (mancozeb), triazotin, and SK mineral oil, which are sprayed at regular use concentrations and sprayed around the fruit.
3, 蚧 class. Has entered three or four generations, mainly to harm the fruit surface, resulting in fruit surface stains, a direct impact on the decline in fruit quality, prevention and control work done during this period, can reduce the overwintering insect population.
Pharmacists can choose to kill thiazolyl, to kill phosphorus (fast culling), thawing, cockroaches, and Lost (for first and second instars), buprofezin or chlorpyrifos and so on.
4, black thorn whitefly. Parasitizing on the back of the leaves, the hatched larvae are fixed at a site of harm and secrete honeydew, induce soot, and leaves are completely black, affecting photosynthesis.
The agent sprayed imidacloprid, Yunomei, Lost, dichlorvos, trichlorfon and so on.
5, disease. During the ripening period of citrus, some latent pathogens are susceptible to disease damage in case of suitable weather conditions, resulting in many lesions on the surface of fruits, affecting the appearance quality of fruits and reducing economic benefits such as anthrax, black spot, black spot, and lipids. Yellow spots and so on. Spraying Dasheng (Manson Manganese Zinc), Quyi Wanke (Wang Copper), thiophanate-methyl or carbendazim and other agents should be sprayed to kill bacteria and reduce the source of illness in the following year.
In case of plastic resin, timely application of 402 fungicide, 843 rehabilitation agent, Bordeaux slurry or 100 times carbendazim solution is required.
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