February 22, 2025

The harm of rice green mites and its control methods

Rice green mites have been attacked in sweet orange producing areas in China. In addition to damaging citrus, they also harm rice, corn, peanuts, cotton, beans, cruciferous vegetables, rapeseed, sesame, eggplant, pepper, potato, peach, and plum. Pears, apples, etc., with adult insects and nymphs as harmful tobacco plants, sucking the top young leaves, tender stems and other juices, let's take a look at how to prevent rice green mites!

Rice green mites

The larvae of the rice green stalks overwinter between the leaves of evergreen trees such as cedar, sassafras and other conifers, camellia, and citrus, and the brown mane, straw and the inner side of the roof. They moved to wheat and cruciferous vegetables in April. The first spawning plant was potato-based, with 3 generations in 1 year. When the bait plants and the temperature are suitable, the larvae develop very fast, and can be attacked for 4 generations in one year. Adults and nymphs are harmful to tobacco plants, sucking the top leaves, tender stems and other juices, often presenting water-stained wilting at the site where the leaves are sucked, and then drying. In severe cases, the upper leaves or the tops of the tobacco plants are wilting.

Occurrence law of rice green mites

Rice green mites are overwintered by adults on various hosts or in leeward concealed areas. Yangcun in Guangdong, Guilin in Guangxi and Guizhou have three generations a year. In the citrus orchard, adult activities were observed in early April. The eggs were produced on the foliage, and 30 to 50 capsules were placed in blocks. The newly hatched nymphs were gathered around the egg shells. After 2 years of age, they were eaten for about 50 to 65 days. Become an adult.

The first generation of adults appeared in June to July, the second generation of adults appeared in August to September, and the third generation of adults appeared in October to November. Every year, the big orange groves and the summer and autumn harvests of rice in the rice fields are related to the migration of adult worms to the citrus orchards. At this moment, a lot of rice green tea is collected in the citrus fruit bite juice, which has a great influence on the quality of fresh fruit and reduces the value of the commodity.

How to prevent and control rice green mites?

1. Reduce the source of insects: During winter and spring, combine the accumulated fertilizer to remove the weeds in the vicinity of the field and reduce the source of wintering insects.

2, artificial killing: the use of adult characteristics of poor ability to soar in the morning and dusk, artificial killing.

3. Chemical control: When the nymphs are in the peak period, the clusters are used in the vicinity of the egg shell without sputum. You can choose 90% trichlorfon 700 times solution, 80% dichlorvos 800 times solution, 50% thiophene emulsifiable concentrate 1000-1500 times. Liquid, 40% dimethoate 800 to 1000 times solution, 25% imipenem 700 times solution, or pyrethroid pesticide 3000 to 4000 times solution spray.

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