Qilu Evening News Qilu one-point reporter Cui Lihui
On August 28, the Municipal Wetland City Construction Promotion Center received 30,000 cocooned Zhou's bees. This batch of "small bees" will be released in some parks and residential areas in the East Side for the control of American white moths. The American white moth is a frequent insect pest in the Dongying area, and the use of biological control measures such as Zhou's wasp for several consecutive years has achieved obvious results. The release of Zhou's wasps this time is selected in the period of the third generation of larvae of the American white moth in the middle of the year, and it also has a certain effect on the prevention and control of the American white moth in the coming year.
At 8:30 a.m. on the 28th, 25 boxes of 30,000 cocooned Zhou's small bees pupated arrived at the City Wetland City Construction Promotion Center. Open the carton, the cocoon is filled with disposable plastic lunch boxes, and from the appearance alone, it looks like the large silkworm pupae common in Northeast-style barbecue restaurants. It's just that the big silkworm pupa in the barbecue shop is a separate worm. The silkworm pupae of the Zhou clan wasp, a cocoon of silkworm pupae will feather about three thousand wasps.
"This is a tulip pupae used for artificial breeding of small bees, and it looks particularly large. If it is naturally bred, an egg can hatch more than 200 larvae, and the larva grows into a pupa, which is of course much smaller than this. Wang Hongfang, a professional and technical personnel of disease and pest control in the Garden Plant Protection Department of the Municipal Wetland City Construction Promotion Center, told reporters.
In fact, on the plastic lunch box containing zhou's small bee pupae, a small number of small bees can already be seen crawling out. The body is about a millimeter long, not the size of a small ant.
Chow's wasp is a parasitic natural enemy of the American white moth, which aims to eliminate the American white moth by parasitizing the pupae of the American white moth. "This bee has a strong ability to fly and find a host. Put the pupae in a small paper pocket, fix it to the trunk with a large head nail, and then wait for it to fly naturally to find the Surrounding American White Moth. The eggs are then laid in the pupal of the American white moth, where they grow and develop, sucking up their nutrients and eventually killing them. Wang Hongfang introduced.
The release of Chow's wasp pupae needs to be carried out in windless or breezy weather, and there must be no rain. The best time to run is from 9 a.m. to 5 p.m. At nine o'clock, in the East Park, the staff selected a ash tree and fixed the paper pocket about two meters from the ground. After being put into the cocoon, it is covered with the end of the paper pocket to prevent "birds such as sparrows from eating the silkworm pupae". Within two days, the bees will emerge from the pupae and search for hosts in hidden places such as rock crevices and grasses around them.
According to reports, the use of Zhou's rodent wasp control of American white moth is a biological control method. Compared with traditional chemical control, it has three main advantages. First, it will not cause environmental pollution, which is conducive to protecting the ecological environment; second, it will not kill natural enemies, and it will not cause adverse effects on some beneficial insects and birds; third, it has overcome the drawbacks of traditional chemical control that may enhance drug resistance, and the prevention and control effect is remarkable.
Zhou's wasp is currently widely used in dongying area. "Dongying can breed wasps locally, and the breeding technology is very mature. In recent years, we will formulate a procurement plan every year according to the actual situation, purchase regularly and distribute it uniformly. Now the control effect of the American white moth has been more obvious, there is basically no outbreak of american white moth on the street trees in the urban area, and at this stage, our control focus is mainly on parks and communities. Wang Hongfang introduced.
In addition, in the control of garden pests and diseases, Zhou's wasp is not the only biological control species introduced to Dongying. Flower velvet beetles, Guan's swollen leg bees, etc., as natural enemies of dried moths such as tianniu and wood beetle moths, also play a silent role in the green areas and parks of Dongying.
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