In the past two years, biological pesticides have become more prevalent. Recently, some people have asked on the Internet: “What are the biological herbicides?†In fact, biological herbicides have been studied in various countries in previous years, but they are not very ideal. The herbicides make a reasonable classification, and the Pesticide network Xiaobian takes you to see the development status of Chinese bioherbicides:
In the 1960s, China has used the cultivation of C. gtoeosporoides f.sp. cuscutae in the practice of "Lubao No. 1", Pseudomonas sp. Control the soybean field scorpion. “Lubao No.1†is one of the first biological herbicides in the world to be used in production practice. Although in the 1980s, the problem of degradation of strains in the cultivation process was studied and solved. However, work in the subsequent commercialization research and development lags behind. For example, by formulating formulas to overcome the demand for water, it can be used in the vast northern soybean producing areas: industrialized mass production, becoming a biological product for farmers to apply, patent application, registration of goods to obtain legal protection. Wait. In the 1980s, the Hami phytosanitary station developed by the Hami phytosanitary station in the 1980s has also achieved practical results in controlling the watermelon field, Orobanche spp. This achievement has previously been used in the former Soviet Union. This is a culture of Fusarium oxysporum var. orthoceras. In addition, there is the aircraft Grasshopper on Eupatorium adenophorum. The slow pathogenicity of the bacteria may be more suitable for classical biological control [7]. The investigation of ragweed plant pathogens has started. However, there are no reports on in-depth studies of specific candidate bacteria.
Some time ago, the Weed Research Laboratory of Nanjing Agricultural University has carried out research in the following aspects and made significant progress. A strain of Altemaria altemata was isolated from a naturally occurring diseased plant of Eupatorium adenophorum. Wild Oats isolated on the oat leaf blight fungus (Drechsleraa venacea) were pathogenicity, host specificity test and culture conditions, showing that the bacteria have the potential to develop biological control of wild oat herbicides. The strain has also been studied as a candidate strain in Australia.
The specialized strains of Colletotr- ichum glosporioides have been isolated from Persian, and their culture characteristics, pathogenicity and specificity have been studied in detail, showing the value of further application development. In the study of the biological herbicides of Cuscuta, the range was extended from the dodders parasitized on soybeans to the Japanese Cuscuta and Medicago sativa which harmed the fruit trees and the Cuscttta campetris on other pastures, and four strains were obtained. Research is being carried out in depth, and two strains have shown the value of research and application. In addition, the Weed Research Laboratory of China Agricultural University and the Hangzhou Rice Research Institute of the Chinese Academy of Agricultural Sciences are also conducting research on alfalfa bioherbicides and have made important progress. These all indicate that in the context of the increasing concern of humans about the environmental pollution and residual toxicity caused by the use of chemical herbicides, the desire for pollution-free, safe new herbicides, in the context of major breakthroughs in international bioherbicidal research, our organisms The research of herbicides is bound to enter a new stage of development that has never been seen before.
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