Tieguanyin tea garden spider is one of the important natural enemies of pests in tea gardens. It plays an important role in controlling the occurrence and development of pests and is an indispensable part of ecological control pests in tea gardens. Through our investigation, a total of more than 70 species of spiders in 16 families were recorded in each tea region in our province, which are broadly divided into two types: net spiders and hunters. Such as the labyrinth funnel spider, round spider, spider, spider, etc.; hunting type such as tawny cat spider, black fly tiger, stripe fly tiger, alert fly leopard, etc., they specifically prey on various tea worms, they Not only a wide variety of species, but also a large number of population, the average amount of spiders per square meter tea tree surface reaches 24.6-60.5. According to our investigation in the Anglo-German tea region, among the numerous spiders, their dominant populations are Grasshoppers, Fly-striped Tigers, Guardian, Leopards, White-headed Tarantulas, Tarantula, Eight-spot Spider.
According to the experiment, the maximum predation of a day and night for various spiders feeding on small green leafhoppers was: 38.48 nymphs of edible grasshoppers or 25.58 worms of edible adults; Guardian flies, edible leafhoppers, nymphs 80.5 47.6 heads of the head or estuary, and 27.78 heads of nymphs or 20.22 heads of adult worms. Although the total number of tea plantations in the tea plantation is not large, the predatory ability of the cat spiders is strong, and they often travel around the tea canopy, preying on and attacking various pests. The spiders in the tea garden are very sensitive to chemical pesticides. After the tea plantations are applied, some spiders with poor drug resistance often fail to survive. According to the survey of tea gardens of the same area, the use of pesticides for 1 year has been stopped. 24 species of spiders have been found, and the total number is 687. However, 11 species of spiders have been found in Shiyeh Tea Plantation. The total number is 215. The application of pesticides can make spider species visible. Decrease, quantity decrease.
The protection and use of Tieguanyin tea garden spiders can be started from the following aspects:
(1) Strengthen spiders and insects. Do a good job of spider and insect monitoring and reporting, so that the situation is clear and the direction is accurate. For example, when the ratio of spiders to green leafhoppers is less than 1:5, there is no need for medication and the number of small green leafhoppers will not increase.
(2) The use of supporting agricultural measures to protect spiders. If the tea garden is properly covered with grass, there are many advantages. It can also provide shelter sites for the tarantula, which is conducive to wintering and crossing the summer.
(3) Apply pesticides in accordance with local conditions. To protect the long-term interests of spiders and other natural enemies, when using pesticides, they should pay attention to safety, reasonableness, and skillful use of tricks. Do not abuse or abuse them as much as possible to reduce the kill rate of spiders. For example, when controlling small green leafhoppers, choose pesticides that have high efficacy against small green leafhoppers, and have a small lethal effect on spiders, such as Ulead.
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