Seven Tips for Proper Use of Pesticides
a. Have a clear background
Be sure to master physical and chemical properties, control objects and precautions of pesticides used. Each pesticide has its own chemical properties, applicable conditions, control range and objects, and each control object (plant diseases and insect pests) has its own rule of occurrence and development; therefore, it is precisely the weak link that is the best time for the medication. Thus, people would have a pretty clear idea about control pests and do it with a purpose.
b. Symptomatic medication
There is a great variety of pesticides, such as fungicides, insecticides, herbicides and plant growth regulators, etc. It must focus on the idea of symptomatic medication in the purchase of pesticides. Nowadays farmers tend to buy pesticides fashionable with high price, namely, they use what others use and misunderstand that pesticides with high prices will have high efficacy; but they forget that crops like people should be symptomatic medication. For example, pesticides cannot be used to sterilize, and vice versa. In addition, there are a great variety of insecticides and fungicides; it is necessary to choose specific medicine for diseases and pests as far as possible. For instance, dimethoate is very cost-effective for the prevention of aphids.
c. Timely medication
People usually complain about much counterfeit pesticides with low efficacy. In fact, many pesticides are not fake or poor. Just they are used in the wrong time, and do not achieve the desired results. Each pest has its own critical period of pest prevention and timely treatment can be more effective; while once missed, it is difficult to achieve the desired results. For example, it is the critical period to control powdery mildew in wheat when the disease center appears and diseased leaves are less than 15% before the disease is not popular; it is critical period to control the bollworm when is in hatching season and larval stage before the second instars, etc. In addition, it would be best to spray in sunny windless weather, before 9:00 am and after 4:00 pm. Many farmers mistakenly believe that higher temperature will bring better efficacy so that they often spray in the noon. In fact, many pests conceal at this time, which leads to reduce the efficacy. Moreover, most pesticides decompose at high temperatures; it is easy to cause poisoning for practitioners working at high temperatures.
d. Adequate medication
People tend to think that the more dosage, the better efficacy. A small amount of drugs does not work, but the large amount of drugs is prone to injury and poisoning for humans and animals, except for man-made waste. For example, high drug concentration in cotton aphid treatment with dichlorvos would cause cotton leaves dry and even cotton plant death; as for herbicides, there are more strict requirements on its concentration, which must be compounded in an appropriate ratio based on prescribed dose, the slightest mistake will result in both grass and seedlings death. Therefore, experts from abamectin manufacturers remind you it must be in an appropriate ratio and rational use according to the crop growth and the degree of crop pests and diseases. Under normal circumstances, pests and diseases are severe when crops grow vigorously, the dosage is high; pests and diseases in the seedling period are lighter, the dosage is low.
e. Proper prevention
Choosing different prevention methods depend on different pests and diseases, such as seed dressing, sprinkling baits, coated stems, dusting, spray, etc. For seed-borne diseases, it commonly uses seed dressing, such as wheat smut control with PCNB. While sprinkling baits are commonly used for the prevention of soil pests. However, regardless of any methods, the medication must be uniform and thoughtful.
f. Alternating or mixed medication
Pests are easy to have resistance if certain pesticide is used for a long time. For example, bollworm’s resistance is enhanced for the single use of pyrethroid pesticides in a long term. Pesticides are used interchangeably depending on the pest; or two or more pesticides are mixed to use according to their characteristics; these ways can effectively delay the resistance.
g. Natural enemy protection
Each pest has its own natural enemies, such as ladybird also named “aphid lions”. When the ratio of ladybird and aphids in wheat fields is not less than 1:150, you do not have drug prevention. In addition, in the pest control, it would be best to use pesticides with good selectivity so as to the pesticide only effects on pests, thus natural enemy can be protected well. Biological control can not only reduce the cost, safe and effective, but also improve the quality of agricultural products.