Bemisia Tabaci is rampant
updated at 2012-10-12 Click:

According to the survey of related observation and prediction regional station, recently bemisia tabaci appears commonly, adult increases quickly, and some vegetable fields and cotton fields have much more bemisia tabacis.


According to the survey ofBazhouCity, the occurrence rates of summer cucumber, eggplant, Chinese cabbage fields and other plantfields are 100%; the occurrence rate of each cucumber plant is 100%, and that of each leaf is 35.3%, and there are 1-15 insects in each leaf on average. The occurrence rate of each eggplant plant is 100%, and that of each leaf is 50.6%, and there are 1-31 insects in each leaf on average, at most 56. The occurrence rate of each Chinese cabbage plant is 85.2%, and that of each leaf is 36.8%, and there are 1-13 insects in each leaf on average. According to the survey ofXinjiCity, there are 1,500 trilobites on 100 Chinese cabbages on average; cucumber 3,000; rape 900. In accordance to the survey of plant protection unit of Raoyang County, there are 1,500 trilobites on 100 cotton plants on average.NingjinCountyfound that there are usually 600-1,500 trilobites on 100 cotton plants with 2,000 at most, and the currency rate of each plant is 90.6%.


Having a wide host range and reproducing quickly, bemisia tabaci can directly pierce and suck water, which makes plants weak. Nymph and adult can secrete honeydew which causes sooty mould and can seriously influence photosynthesis. In addition, bemisia tabaci can spread more than 70 viral diseases in over 30 plants, such as Tomato Yellows Leaf Curl Virus, which will seriously harm cotton, vegetable and other plants.


According to the weather forecast, recently most areas inHebeiProvinceare primarily fair to cloudy, which is very favorable for the bemisia tabaci. Various regions should enhance investigation and monitoring, release weather forecast in time and guide farmers to inquire and control diseases to guarantee safety production of vegetable, cotton and other plants.

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