It is reported that August is the high incidence period of citrus diseases and insect pests. In recent years, the planting area of citrus, especially sugar orange, in Yangshuo, Guilin, Guangxi has been increasing. Due to the increasing output, the relationship between supply and demand has changed, and the market purchase price is getting lower and lower. Especially with the longer planting time and the older trees, all kinds of pests and diseases are becoming more and more serious. Due to soil problems, the disease resistance of citrus is getting worse, but the drug resistance of the disease is getting stronger and stronger. Liang Ge, a citrus grower in Chongshan Village of Jinbao Township Bridge in Yangshuo, told us that in recent years, the yield and quality of citrus have been greatly affected by pests and diseases, and the use of pesticides is also very large. After applying Shen Yan organic fertilizer from New Shengli Company, it was found that there were fewer pests. First of all, through direct observation, ground pests such as red spiders, rust ticks, liriomyza sativae and so on are obviously reduced. It can also be seen from the tree vigor and fruit appearance that diseases such as scab, resin disease (sand skin disease), foot rot and underground pests are also decreasing. Lao Zhang next door has been paying attention to why the geographical location is similar, the same management and medication are similar, and why the fruits in the field are not so beautiful (the fruits that are not affected by pests and diseases are very shiny). He introduced to Lao Zhang that the cost of using Shen Yan organic fertilizer is not high, but the trees are good, the cost is far less than the cost of using less pesticides, and beautiful fruits are very important to the sales price. Citrus is planted not only for production, but also to control pests and diseases.

So why can organic fertilizer in Shen Yan completely kill underground pests and prevent diseases? According to Professor Mo Zhinan, the chief agrochemical expert of Li Xinsheng Agricultural Company, the main raw material of organic fertilizer in Shen Yan is the leftovers of cigarette industry. In addition to the general functions and characteristics of bio-organic fertilizer, it also has the function of comprehensive pest control and disease prevention, and its insecticidal component is mainly nicotine. Nicotine usually refers to nicotine and its similar alkaloids, and nicotine accounts for more than 95%. Nicotine has sufficient scientific principle to kill pests, and it has reached a consensus in the field of scientific research. Nicotine mainly acts on the normal conduction of insect central nervous system, leading to paralysis and even death of pests. It has high efficiency, broad spectrum, good root imbibition, contact toxicity and stomach toxicity, low toxicity to mammals and environmental safety. It is very effective in controlling HOMOPTERA, COLEOPTERA, Diptera and LEPIDOPTERA, and can be used for stem and leaf treatment, soil and seeds.

It should be noted that different types of tobacco leftovers have different nicotine contents, which are easy to decompose and have a general effect on killing pests. In order to solve the problem that common nicotine is easy to decompose, Li Xinsheng Company and Shen Yan Organic Fertilizer adopted advanced nicotine activation technology, which greatly improved and strengthened the insecticidal effect, while Shen Yan Organic Fertilizer maintained a strong comprehensive effect of insecticidal and disease prevention.

According to the farmer, according to his long-term experience in planting citrus and observation of its growth, organic fertilizer in Shen Yan is different from pesticide application, and it is a combination of prevention and control. It can not only play a good preventive role, but also completely kill underground pests and improve the disease resistance and stress resistance of crops, so as to grow such good fruits.