In recent years, due to the large-scale use of various herbicides, it has indeed improved production efficiency and liberated a large amount of labor, which is a great progress for agricultural production. However, the pesticide network recently found in Wulian County, Shandong Province: the blind abuse of farmers, the large or excessive use of various herbicides is more prominent, which not only affects agricultural production and crop yields, but also brings environmental benefits. No small negative impact.
First, like ordinary 50% acetochlor EC, many farmers do not follow the recommended dosage at the time of use, but they increase the dosage at will, and some even blend 100 times and 200 times, which greatly exceeds the recommended dosage. As a result, the normal growth of the crop was severely inhibited, and even death and lack of seedlings occurred, and the yield decreased. Many farmers have reported that many of the corn roots are now less than in the past, resulting in reduced drought resistance and lodging resistance, which is related to the large use of herbicides. For example, Li Mou, a villager from Fangzi Village, a street town in Wulian County, planted an acre of soybeans in the spring of 2013 , using a 99% acetochlor produced by Shandong Jinan Kesaijiong Chemical Co., Ltd. The biggest advantage of this acetochlor is that it does not harm the roots of the crops and does not affect the growth of the crops. In recent years, it has been very popular among farmers during the promotion process. However, after the emergence of the soybeans of Limou, the phenomenon of dead seedlings has been appearing until the seedlings grow to a height of more than ten centimeters, and they continue to die without interruption. After finally eliminating the causes of seeds and fertilizers , the conclusion was that acetochlor was used in excess. It turned out that he used a bottle of 2 mu of land for all the pesticides in an acre of land, which led to the death of this seedling.
Second, a large number of selective herbicides are widely used, and this traditional herbicidal method has been completely replaced by such herbicides, such as peanuts , soybeans, sweet potatoes, corn, etc., all of which use selective herbicides and broad herbicides. . Since it is a selective herbicide, it will inevitably have a cross-effect on the crop. In particular, long-lasting herbicides such as chlorsulfuron-methyl, imidazolium, and atrazine are used as long-term residual herbicides. Although such selective herbicides are generally safer for this season's crops, the manufacturer only advertises its effects in the instructions, and it is often unclear whether it has an impact on the crops. For soybean fields that have used imidazolium and chlorsulfuron, rice, corn, etc. cannot be grown in the second year, and if the herbicide like corn is used in excess, it will have a serious impact on the crop.
The author in the course of the investigation, many farmers reported that: In recent years, severe winter wheat seedlings died, some plots are beginning emergence neat, but soon there will continue to die, and some even appeared off the ridge phenomenon. Some of the same and same batches performed well on some plots, while in some plots they showed little and weaker conditions. Some farmers have initially suspected that they are caused by fertilizers, seeds or germs. However, through the analysis of the use of herbicides and the comparison of adjacent plots, the final culprit is the excessive use of herbicides for the crops.
Then, farmers use a large number of herbicides in the mantle and the ditch, which can easily cause damage to the environment. Such as water pollution, soil erosion, damage to local microclimates or the extinction of certain plants.
Here, the author reminds the distributors and plant protection departments to strengthen the propaganda and popularization of pesticide knowledge, and guide the farmers to use and use herbicides properly. Only in this way is the guarantee of agricultural harvest and better protection of the environment.
Nowadays, the medicines used by farmers are backward products. Like some back sprayers and manual high-pressure pumps that have been used for many years, the phenomenon of running leaks during use is serious, which greatly reduces the utilization rate of pesticides, which not only reduces the pests and diseases. The control effect of the damage has also increased the use of pesticides, which is also an important cause of phytotoxicity and personnel poisoning accidents. Therefore, propagating the elimination of backward medical devices and encouraging farmers to use new medical devices is of great significance for improving prevention and control effects, reducing farmers' investment, and reducing phytotoxic accidents, and should be brought to the attention of relevant departments. It is also recommended that pesticide manufacturers in this type of herbicide instruction manual should be able to objectively and correctly indicate whether the crop (especially the lower crop) has an impact or adverse reaction, so that the farmers' friends can be aware of the use process.
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