Biological pesticides will dominate the pesticide market



Making biopesticides the mainstream of development "has been a slogan put forward in China in recent years. Undoubtedly, in the future, the country will vigorously support the development of biopesticides enterprises, and the future of biopesticides will be full of sunshine.

The concept of biopesticides has been widely spread, and biopesticides refer to a type of pesticide formulation that uses living organisms or their metabolites to control harmful organisms such as pests, pathogens, weeds, nematodes, mice, etc., or that has specific effects through biomimetic synthesis. Chinese biopesticides can be divided into four parts based on their composition and source: microbial living pesticides, microbial metabolite pesticides, plant-based pesticides, and animal based pesticides. According to the control targets, it can be divided into insecticides, fungicides, herbicides, acaricides, rodenticides, plant growth regulators, etc.

With people's attention to environmental protection and health, the use of efficient and highly toxic organic phosphorus pesticides is subject to varying degrees of restrictions in various countries around the world, as the problem of "eating well" has been solved and the problem of "eating well" needs to be solved. High efficiency, low toxicity, and low residue are the development directions of the pesticide industry, mainly including two categories - high efficiency, low toxicity chemical pesticides and biological pesticides. They are like two wheels of a bicycle that are indispensable, so the development prospects of biological pesticides are undoubtedly broad.

At present, there are few biopesticide production enterprises in China, with small production scale, single variety, low market share, and insufficient development potential. There is a significant gap compared to developed countries. The development of biopesticides has indeed reached an urgent stage. I believe that while developing biopesticides such as microbial living organisms, microbial metabolites, and plant-based pesticides, it is particularly necessary to vigorously develop animal based biopesticides to form a biopesticides industry with Chinese characteristics.

Insect virus pesticides, which play an important role in biopesticides, are a top priority for future national development. Insect viruses were once known for their high selectivity and specificity, but experiments have shown that one insect's rod-shaped virus can infect other insects. For example, the nuclear polyhedrosis virus of the silkworm can infect 11 insects such as the oak silkworm. The nuclear polyhedral virus of the European spruce leafroller moth can infect spruce leafroller moth, apple sac moth, plum fruit moth, European pine tip leafroller moth, etc. The red brown gray armyworm nuclear polyhedrosis virus can infect 12 species of armyworm family pests, including silver striped armyworm, yellow ground tiger, and armyworm. At the same time, an insect can also be co infected with two different types of viruses, such as yellow tiger, cabbage butterfly, armyworm, pink striped armyworm, spruce leaf roller, etc., which can be co infected with nuclear polyhedrosis virus and granulosis virus. When the armyworm is co infected with nuclear polyhedrosis virus and granulosa virus, the granulosa virus can enhance the infection of nuclear polyhedrosis virus and have a synergistic effect.

According to reports, about 20 insect viruses in China have been tested or are currently undergoing field trials. Among them, cotton bollworm nuclear polyhedrosis virus, which has been extensively studied and applied, is used to control cotton bollworm. For every 667m2, 2-3 old dead insects infected with the virus are used (the number of nuclear polyhedrosis is about 0.15-6) × L011. According to reports, the use of cotton bollworm nuclear polyhedrosis virus formulations in the United States to control pests such as cotton bollworm and tobacco armyworm on crops such as cotton, corn, sorghum, tobacco, and tomato is generally equivalent to commonly used chemical pesticides. The insecticides of the cabbage armyworm nuclear polyhedrosis virus have a wide insecticidal spectrum and have good control effects on 32 species of insects in the order Lepidoptera. Among them, the insecticides have the most significant effects on pests with greater harm, such as the rice stem borer, rice leaf roller, diamondback moth, cotton bollworm, beet armyworm, cabbage armyworm, tobacco budworm, geometrid, yellow tiger, and armyworm. Compared with some highly toxic chemical pesticides, these insect virus pesticides have good control effects, but are very safe for the quality of agricultural products and the agricultural ecological environment.

The use of insect virus pesticides to control pests can not only have a short-term control effect of microbial insecticides, but also have the potential to cause the virus to persist in agricultural and forestry ecosystems for a long time after use, serving as an introduced ecological factor to regulate the population density of pests. After the conventional method of applying or releasing a certain amount of virus spread by infected insects, the pathogen can spread on its own among insect populations. Baits and dispersal carriers have a high potential for ovarian transmission, while other insects or parasites and predators have the potential for mechanical transmission of the virus. So viral biopesticides are insecticides that have a comprehensive insecticidal effect and control the number of pest populations, ushering in a new era of insecticides. The key difference between them and other pesticides is that they can form a specialized, long-lasting, resistant, convenient, and safe high-efficiency insecticide in the pest population.

At the recent China Insect Virus Pesticide Industry Summit Forum, experts pointed out that the use of biopesticides to replace chemical pesticides is a trend in international pesticide development, and the country has listed the biopesticides industry as an emerging strategic industry during the 12th Five Year Plan. Insect virus insecticides have the advantages of good insecticidal effects on target pests, no pollution to the environment, no harm to natural enemies, and low resistance to pests, making them one of the most promising varieties of biopesticides. Non polluting biopesticides - Insect viral pesticides are a special killer that can cause insect diseases. The use of viruses to control agricultural and forestry pests is increasingly attracting widespread attention, and this is a promising preventive measure. After entering the worm, the virus particles proliferate within the body, causing damage to the worm tissue and ultimately leading to death. In addition to infecting larvae, insect viruses can also invade insect eggs, giving birth to congenital viruses from the beginning of embryonic development. It can also attach to the egg shell, When larvae hatch, they become infected and die. Adults can also transmit the virus to the next generation, causing a large-scale epidemic. Therefore, virus pest control can achieve the effect of "cutting off offspring and extinction" for pests. So far, 1671 species of insect viruses have been discovered and reported worldwide, and 291 species of insect virus resources have been investigated and discovered in China. It can be seen that the resources of insect viruses are very abundant, and the development of insect virus pesticides has great potential.

The development of new chemical pesticides and drugs is becoming increasingly difficult, and the speed of their emergence is far lower than the speed of pest resistance; And biopesticides are relatively simple. Secondly, biopesticides have safety, non-toxic side effects, low pollution, low energy consumption, and low carbon emissions, which meet the requirements of human living environment. Vigorously developing biopesticides has become an inevitable trend, and biopesticides are an important guarantee for green food production. In China's green food production standards, it is clearly stipulated that AA grade green food production requires the use of biological pesticides such as Bt and viruses. Although the production cost of biopesticides is slightly higher than that of chemical pesticides, the benefits they bring are immeasurable and can be widely used in the production of green and organic foods, improving the quality of crops, and generating greater economic benefits. In addition, with the gradual establishment of food safety systems and the improvement of farmers' awareness and skills in using biopesticides, green agricultural products will inevitably be recognized by consumers, and foods with high pesticide residues will be eliminated from the market.

The trend of the development of biopesticides has become a foregone conclusion. Although there are still certain difficulties in the research and development, industrialization, scale up, and promotion of biopesticides, many industry insiders have expressed that biopesticides may become the mainstream variety of pesticides in the future. (Source: Hunan Pesticide Industry Association)