The number of pests in different crops across the world is rising, and there is a tremendous increase in the number of insecticide-resistant pests. Insecticides can be used to control a variety of pests, however, overtime, they loose their effectiveness, as pests develop resistance, a significant decrease in sensitivity to a pesticide, which reduces the field performance of the pesticides. Reliance on insecticide-based pest management of insect pests often leads to the development of insecticide resistance. The United States Environmental Protection Agency (EPA) is working on slowing and combating pests’ resistance to pesticides. These pests have caused enormous loss with regard to many economically important crops and have forced farmers to rely more on the usage of chemicals. Farmers are applying higher quantity of the same insecticides to kill crop pests, which has lead to pesticide resistance in the field. With each application, a few pests survive, who pass on their genes to their offspring. Eventually, the pesticide stops killing pests, leading to crop damage, which leads to demand of more investment in the R&D and new formulations of insecticides in the market. According to an International Survey of 2017, by Issac and McManus, currently, there are 500 cases of pesticide resistance and 200 cases of insecticide resistance, worldwide.

随着养殖密度的下降，猪瘟疫情逐步趋于稳定，生猪的存栏量及出栏量将逐步恢复，但仍需一段较长的时间才可回稳至正常水平，短期无法完全满足市场需求。在此之前，疫情的冲击使得对散户养殖模式的要求在环保要求上更进一步，对养殖管理、疫情防控、资金等方面提出了更高的要求，供需不平衡将持续存在。对规模化养殖企业来说，生猪养殖将迎来量多价高的发展阶段。建议关注牧原股份、温氏股份、正邦科技、天邦股份。