In recent years, as the adjustment of agricultural planting structure, various intercropping area expanded rapidly, multiple cropping index increase year by year, resulting in crop disease weed occurrence and damage of the trend of yearly increase, causing the pesticide application amount and application area of increased exponentially, effective predators by the killer, zoology environment is destroyed, pollution-free products relative reduction, physical and mental health of the masses under threat. Therefore, scientific and reasonable use pesticide to agricultural increase production to add close have important sense.
One, buy pesticide for diseases and insect pests
We must first understand the occurrence of disease and insect pest is, what is the disease what. And then to understand pesticide properties, pesticides, fungicides and herbicides are, at the same time is what killed the worm, and what kind of disease, in addition to what grass. Don't indiscriminately, see drug use, lead to medication errors, influence the control effect, and even cause greater harm.
Two, strictly control index, make suitable period to prevent
Crop growth period, can see a few diseases and insect pests. See field pests damage on spraying and, is often unnecessary, because each kind of diseases and insect pests, have reached a certain control index is necessary for chemical control of pests, diseases are not up to the control index, no need for chemical control, even if the medication, can only choose rule.
The three, want to use high efficiency and low toxicity or biological pesticides
The field can be more effective to control pests natural enemies, can receive a reduced number of use, reduce control cost, reduce environmental pollution, a multiplier effect. Such as the wheat aphids. When the field ladybug, Syrphidae and other predators harm than in 1: 80-100 or from parasitic rate of more than 30% can not spraying control, use of natural enemies to control aphid pests; even harm than disorders, also should choose to ladybug, Syrphidae and other predators have better protection effect of 50% Pirimicarb can wet powder or 5% efficient big hero EC, high efficiency and low toxicity pesticides on aphid control. Cotton bollworm, red spider, in the beet armyworm, can choose Bt, Liuyang mycin and other biologics control, ladybirds, lacewings, field spider predators have better protection effect.
Four, to alternating use, prevent resistance
Long term use of a pesticide, insect will become resistant, resulting in decreased control effect. Therefore, not to find some pesticide effect on long-term use, even if found in control effect has been reduced, nor the replacement of varieties, and by increasing the dose method, the dosage is bigger, stronger pest resistance, and then increase the dosage, resulting in vicious spiral. Should pay attention to from place to place, because of diseases and insect pests prevention object system, farmer according to three to four different dosage forms and Insecticidal Mechanism of alternating use of pesticides.
Five, strictly will poison, highly toxic, high residues of pesticides in fruit, vegetables
Some farmers lack of safety concept, that of high toxicity, the effect is good, the forbidden in fruits and vegetables and edible plants on the use of pesticides used for these crops, livestock and made adult poisoning. Therefore, the use of pesticides must be in accordance with the national award of" of safe use of pesticide regulation"," standard for safe use of pesticides, pesticide"" fair use guidelines" and other provisions, no toxic, highly toxic, high residues of pesticides in vegetables, fruits and use, must not be arbitrary enlarge the range of use and changes in use.
Six, a scientific and reasonable use pesticide, pesticide mixing principle to follow
Pesticide rationally mixed use, with prevention and treatment of various diseases and insect pests, increase the control effect, save labor and other advantages, but can not be mixed pesticides, otherwise, not only fail to mix effect, can also cause crop injury and poisoning of exacerbations. Pesticides mixture should follow the following principles: one is mixed without the occurrence of adverse physical and chemical changes, to meet the basic substance decomposition failure of pesticides, not with the alkaline pesticides mixture, wettable powder and emulsion pesticide mixtures; two is mixed without adverse effects on crops; three is mixed cannot reduce the efficacy; four after mixing the use of no cost increase.
Seven, strict pesticide use density, prevent resistance phytotoxicity
In pesticide formulation, some do not believe that the recommended dosage, arbitrarily increase drug concentration; some simple and engaging, dispensing without measuring, inaccurate number, the results not only is wasteful and serious, and it makes the occurrence of crop medicine tools factory, the pest resistance enhancement. Therefore, in strict accordance with the standards of pesticide formulation ratio, vigorously promote the use of ultra low volume spraying technology.
Eight, strictly follow the state regulations for safe use of pesticides interval recovery, don't use soon after harvest
Pesticide safety interval refers to the crop last pesticide application time from the days of the harvest, this is to reduce pesticide residue in agricultural products, prevent the residue of one of the important link, is the important means to protect the health of consumers. Therefore, should be strictly in accordance with national regulations of the safety interval of harvest, especially fruits and vegetables, in order to prevent livestock food poisoning. 80% dichlorvos EC 1000 times liquid spraying in the cabbage, rape, the safe period of not less than 7 days, pyrethroid pesticide spraying in the fruit and vegetable, safe interval period of not less than 7-10 days, fungicide safe interval period of not less than 5-10 days.

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