The Interaction between Pesticides And Fertilizers

Posted on June 27, 2017 | By admin | No comments

1, insecticide, acaricide mixed with fertilizer

(1) the impact of pesticides on plant mineral nutrition.

It is proved that many chlorinated hydrocarbons, organic phosphorus and carbamate pesticides can affect plant growth and plant mineral nutrition. After treatment with cotton 下载 (2) , the concentration of calcium, magnesium, phosphorus, potassium and other elements in the petiole of cotton increased. With the study of the mixed effects of different nitrogen and nematocides on cotton, the nematode is the only one significantly promoted the growth of cotton, increased yield and increased nitrogen and potassium content in cotton leaves.

(2)the impact of fertilizer on pesticides

Nitrogen, phosphorus, potassium mixed with pesticide may improve the surface activity of some pesticides like increasing its permeability, adhesion and its insecticidal activity. For some microelements, they may react with different insecticides to increase or decrease their activity. 掺混肥1 Some fertilizers can also be used as insecticides, fungicides, like the ammonium nitrate is used by Russian people as nematicides which can both prevent soil nematodes and reduce environmental pollution caused by the use of pesticides.Improving nutrition of plant also can increase plant resistance to pests. The more mature or slow-growing parts of young tissue or meristems are easy damaged by pests, so there is usually a positive correlation between the application of nitrogen and pest infestations. However, use much potash can reduce the invasion of pests. Sugar, amino acids, amides of plant are the stimulus factors of sucking insects. Changes of the mineral nutrient of the plant will affect the changes of these substances. Fertilization can reduce the impact of plant insect resistance by adjusting the accumulation of these low molecular organic compounds or Agent compounds. The deposition of mineral elements in plant epidermal cells is a kind of barrier to piercing-sucking and chewing insects. The use of pesticide in some silicon-deficient areas will increase the effectiveness of pesticides in the treatment of plant epidermal cells. The Reasonable combination of pesticides and fertilizers can improve the ability of infiltration, absorption, transmission and plant resistance to insects so that enhancing the control effect, reducing the amount of pesticides.

2, the combination of fungicides and fertilizers

(1) the application of fungicides have great influence on plant mineral nutrition. Kemi Dan, thiramate, pentachloronitrobenzene, dexamethasone, mancozeb can reduce the corn’s absorption of manganese, while increase the absorption of zinc and also increase plant fresh weight. Spraying carbendazim, methyl thiophanate, zinc and fuming on foliage can increase nitrogen content in peanut leaves. Methyl thiophanate and carbendazim have great influence on the process of increasing nitrogen as well as the application of methyl thiophanate, Carbendazim, high concentrations of dexamethasone and phenanthrene can also increased the leaf phosphorus and potassium content.

(2) Fertilization often leads to the increase or decrease of plant disease resistance so that have a great influence on the effect of disease prevention of fungicides. u=2425178701,373327891&fm=21&gp=0 If fungicides are mixed with nitrogen fertilizer, the two will show a certain synergistic effect.Through improving fertilization (such as the application of urea) will also promote crops absorption of fungicides. About wheat production, spraying fungicide propiconazole and urea mixture is necessary because urea can improve foliage activity as well as propiconazole and urea can improve the photosynthetic rate of so that can improve crop absorption of propiconazole. The administration of nitrogen generally usually can increase plant susceptibility. The fertilization of nitrogen fertilizer will decrease the incidence of leaf rust of wheat and the effect of fungicide of nitrogen fertilizer so that we need to increase the amount of fungicides to reduce the disease. In addition, the improvement of potassium nutrition is conducive to improving the disease resistance of host plant.