Citrus red spider is one of the most important pests in citrus cultivation. If it is not treated in time, it will cause a lot of deciduous citrus trees, which will cause the tree to decline, causing the fruit epidermis to be destroyed and seriously affecting the commodity. Therefore, the control of citrus red spider is citrus production. The primary task. Citrus red spider belongs to the order of the genus, the genus Aphididae, also known as the citrus full-clawed scorpion. In the annual average temperature of 18 degrees or more, the annual occurrence of 12.....24 generations, overlapping generations, no obvious wintering period, the spring and autumn two seasons as an outbreak In the peak period, if the spring and autumn prevention and control in summer and winter are good, it will not be serious. If it is not good, it will happen seriously! According to years of practice research, the prevention and control of red spiders will start from the following aspects. Citrus red spider pest map First, agricultural measures, rational application of chemical fertilizers, rational allocation of nitrogen, phosphorus, potassium ratio, avoid partial application of nitrogen fertilizer, nitrogen excess leaves and long shoots, frequent new shoots, provide ideal breeding ground for red spiders, excessive nitrogen orchard red spider often occurs Serious; do the winter clearing and pruning, so that the tree body is ventilated and light, reduce the insect source and facilitate pesticide coverage! Second, biological control, red spider green has many natural enemies, such as predators, ladybugs, buds and other natural enemies and microorganisms, advocate grass cultivation, provide a living environment for natural enemies, avoid the use of broad-spectrum pesticides and fungicides, production In the process of spraying the chrysinogen broad-spectrum pesticides, the spider mites are killed, and the red spiders will develop rapidly. The fungicides are also the same. For example, copper and sulfur agents kill the red spider natural enemies Thompson. . If Starscream has an average of 3 adults per leaf to release predatory cockroaches, there are blunt cockroaches on the market. Each plant has about 1,000 boxes, and the red spider worms have lost more than 95% in 30 days. Third, chemical control, usually do a good tour of the orchard, do a good job in the clearing of the park in winter, anti-red spider winter clearing garden is the first step; optional mineral oil such as: green Ying, enemy dead insects, and other high-security mineral oil clearing garden Mineral oil concentration 200...300 times can be mixed with 2.0 avermectin 3000 times, or ketone (acetylene) 1500 times to enhance and enhance insecticidal effect; stone sulfur mixture, killing cockroaches Can be used, but the insecticidal power is not very ideal, the corrosion of the application tool is great; secondly, the early spring prevention and control, early spring is an important period of prevention and control of red spiders throughout the year, at this time due to low temperature, many thermophilic acaricide activities Not ideal, such as Kruth, triazole tin, single, amitraz, and other pests occur at this time, the agent can use physical high-quality mineral oil 200...300 times plus 2000 times fenproate, Or fluoropyridazine 5000 times, butyl fluoride 1500....2000 times, the density of the insect population is 5000 times. If the spring shoots are ripe, there will be a peak if there is no prevention in the early stage, and the production should pay attention to the selection of suitable pesticides. Finally, in the fall, you must prevent a red spider before and after the fall, otherwise the damage will endanger the autumn shoots and fruits! Pay attention to several problems in chemical control; First, improve the spraying method and use the spraying tool. People are convenient to use the spray gun. The spray lens leaves are thicker and the leaf cover is about 95%, but the leaf back coverage is poor, less than 100%. Seventy, especially the drooping branches and leaves. The red spider eggs and the young cubs are all in the leaf veins of the leaves. The low quality of the spray will reduce the control effect of the red spiders. Second, alternating rotation of pesticides, some fruit farmers feel that a certain pesticide must be used every time, resulting in the emergence of resistance to red spiders, speeding up the life of the acaricide! As previously banned dicofol was just launched 2000....3000 It has a very good effect, water, amine, oxygen, scorpion, sulphate, tetrazine, etc. have been basically eliminated due to unscientific use! Finally, many acaricides do not kill eggs, you will find spray The acaricide Minghong red spider died very well but the insect density is still very high after 10 days. This is the reason why the acaricide kills and does not kill the egg. If you do not add the ovicide, it is recommended to repeat it once in 7..10 days. You can kill the newly hatched cubs and control the pests! This article URL: citrus red spider pest map and prevention methods Shaanxi Kang New Pharmaceutical co., Ltd. , https://www.anabolicsteriod.com
Citrus red spider pest map and control measures