Grapes are produced in all parts of the Yangtze River basin in China, mainly in Xinjiang, Gansu, Shanxi, Hebei, Shandong and other places. In the process of planting grapes, herbicides often occur, so how to carry out specific prevention? China Pesticide Network Xiaobian for you to prevent the occurrence of phytotoxicity: Tunnel lining with segmental rings behind TBMs are reinforced concrete elements and must be calculated and designed according to the standards of reinforced concrete constructions. In tunnelling, however, specific circumstances must be taken in account, which make design much more complicated: The determination of loads during ring erection, advance of the TBM, earth pressure and bedding of the articulated ring, is difficult. The ring model and the design input values must be studied carefully according to the parameters of the surrounding soil. Tunnel Ring,Tunnel Door Ring,Steel Ring Of Tunnel,Tunnel Steel Ring Anshan Lijian Engineering Group Co. LTD , https://www.lijianformwork.com
In recent years, with the large-area use of corn in the corn field, especially the application of highly volatile herbicides such as 2,4-D butyl ester, there has been a phenomenon in which the drift of the insecticide is harmful to other crops. According to the survey, the grape suffering from the grape in our province has become more and more serious, especially in the early varieties of germination and spreading leaves of mountain grapes, especially the damage. The leaves of the damaged plants are like boiled water. In the later stage, they dry and fall off, and the ears also show different degrees of wilting. In severe cases, the fruit pieces fall off, resulting in a substantial reduction in yield. The specific prevention methods are as follows:
I. Isolation: Under the current situation, the use of herbicides cannot be restricted. The most effective measure that our grape growers can take is isolation. The first is to carry out the protection of grape production; the second is to carry out the open field cultivation, and not to be put on shelves after the excavation. When the nearby corn growers spray the herbicide in the middle of May, the mulch is used to cover the grapes and avoid the peak of spraying the herbicide. After that, put the grapes on the shelves and carry out normal management.
Second, spray water or antidote: If the grapes are not isolated, it is necessary to pay attention to the spraying of water or alkaline pesticides , such as stone sulfur mixture, Bordeaux mixture, etc. in the case of smog weather before and after the rain. Because herbicides are generally acidic, they are easily decomposed in the presence of alkaline substances. However, it should be noted that spraying water or alkaline pesticides is best predictive, otherwise it will be sprayed after sensory symptoms. The effect is poor.
Third, strengthen comprehensive management: the damage of herbicides to grapes is generally temporary. After the grape is found to be damaged, comprehensive cultivation management such as fertilization and irrigation should be strengthened to restore the tree as soon as possible. When the summer shoots and the secondary shoots are topped, it should be a few days after the mistake, leaving a few more leaves.
Because of the different types of herbicides , the methods of salvation are different, but the usual practice is: watering, to achieve the purpose of washing off part or diluting herbicides; fertilization, mainly in the plant growing season, applying foliar fertilizer, enhancing plants Resistance, reduce phytotoxicity.
The grape growing process prevents phytotoxicity from doing so