Spring pesticide is hit so, top twice, spend less money!

Two, when the drug

6, master the method of medicine

To the disease insect that likes to harm in some place of the plant, hit this place emphatically when medicating (wait on leaf back, fruit, flower, stem base).

7, grasp the distance and speed

For example, the head of the knapsack electric sprayer should be about 30-50 cm away from the target;The motorized sprayer remained at about 1 meter.The person walks slowly when dozen medicine liquid is easy to connect piece, walk fast some parts can not hit medicine, want to hold the speed that walks so, find the speed that suits oneself.

8. Adjust the size of medicine drops

According to the performance of the sprayer and its nozzle, the suitable size of fog drops can be adjusted.Smoke machine can be used to control diseases and tiny pests such as aphids and whiteflies in greenhouse vegetables.Open ground vegetable when pest of disease and insect control, be about to choose to spurt mist drop bigger sprayer.

Iii. Matters needing attention

9. Do not use single pesticides

Some farmer friend USES pesticide to often be put in the problem of "overtopping, overtopping".For instance tomato produced late blight to gush pulik or armour frost spirit, produced early blight to gush mancozeb zinc or alum that kill poison, produced bacterial sex disease to gush copper preparation to wait, the result is to treat a kind of disease to go up again on a kind of disease, press gourd gourd gourd gourd rises again, treat to treat did not cure.

The reason is that single drug use is not conducive to the comprehensive control of a variety of diseases.The use of scientific and reasonable pesticide mix can expand the scope of use or simultaneously treat several kinds of harmful organisms, and can even increase the efficacy and reduce drug resistance, harm and other side effects of pesticides, both efficient and time saving.

Copper can be mixed with many fungicides and insecticides.Spraying the mixture of 30% suspension 600-fold liquid and 70% methyl sulforaphane 800-fold liquid to prevent and cure vegetable diseases such as brown spot disease, bacterial leaf blight disease, anthrax disease, bacterial keratosis, etc. The "jiarinong" (king copper of spring mine) mixed with cycomycin can prevent and cure tomato bacterial disease and fungal disease.

10. The concentration of pesticide containing azole should not be too high

Contain the bactericide of zole kind very much, the specification of these bactericide says effect of disease of powdery mildew of control and prevention, leaf mould, rust how how good, did not explain dosage overmuch side effect however.Therefore, when using this kind of pesticide, it must be used strictly in accordance with the specified quantity, or the concentration will be too high, which will make the top leaves of the plant become smaller, thicker and shrivel, and the most obvious is that the internodes become shorter. For example, special attention should be paid to the use of cucumber and zucchini.

11, spraying pesticides to add foliar fertilizer must be careful

Because the composition of foliar face fertilizer is more complex, except a large number of elements and phosphodihydrogen potassium, majority is the mixture of big, medium, microelement, a few foliar face fertilizer still have hormone and assistant agent.The metallic ion that contains is in the majority with potassium, zinc, manganese, copper.Such a large amount of metallic elements will react with alkaline pesticides, antibiotic pesticides or low-quality pesticides, resulting in different degrees of turbidity precipitation and stratification.Once the mixture is sprayed on the crops, it can lead to drug failure in the mild cases, vegetable growth point atrophy in the severe cases, or symptoms similar to hormone overdose, and sometimes crop poisoning.

Therefore, we should get rid of the erroneous zone of adding leaf fertilizer at will.In fact, some fungicides also have the function of foliar fertilizer.For example, the copper ions contained in pyrimethyl pesticides and copper preparations are beneficial to the growth of crops, and the symptoms of copper deficiency are prevented by spraying.Suitable for the application of appropriate amount of mancozeb on crops, crops generally do not lack of manganese, zinc elements.

12. Do not apply polytropazole to soil

Because the residual effect of polytropazole is long and not easy to decompose, it will directly affect the growth of next vegetable.Taking eggplant as an example, rooting in the soil containing pleiotropazole will directly affect the extension and downfixation of root system of eggplant, resulting in shallow roots and weak plants.In general, the root development of eggplant is a critical period after colonization, when the extended root system will become the backbone of the later root system.However, the application of polyprazole inhibited the elongation and expansion of the root system, and the distribution range of the root system in the early stage was small, which was not conducive to the development of the root system in the later stage. Therefore, it was inevitable that the empty plant in the early stage had a good effect and the plant could not grow in the later stage.

The correct method should be the foliar spraying effect is better, higher safety, and in the season after harvest uprooted, the effect of polytropazole is not easy to produce stubble vegetables.Additional, although appear because of foliaceous face gush is applied much effect is azole harm, still can use gibberellin medicaments fluid to alleviate, and soil is applied much effect is azole remedy very hard.

13. Abamectin should not be washed

Abamectin is a highly effective, low toxic, safe and broad spectrum insecticide, which has strong repellent effect on most nematodes, ectoparasites and other arthropods.Some vegetable farmers in the prevention and treatment of root knot nematode disease, the agent with water, the results of natural control purposes.We say that abamectin needs to be applied at 1,500 to 2,500 times to be effective.

That is to say, each side of water needs to add about 1 jin of avermectin to go with the water, and each mu of land is generally a watering amount of about 15-20 square meters, so that one mu of land needs about 20 jin of avermectin to play a role, such a large amount is impossible to achieve.Should adopt the way of individual plant irrigation root, had better cooperate the bactericidal agent such as evil mildew spirit, bactericidal pure.

14. Do not spray the leaves to prevent root diseases

Phytophthora root rot of tomato and pepper, for example, is a typical root oomycete disease.

In fact, phytophthora root rot control agents are fungicides, and the fungicides are endogenous and protective.In plants, endogenous fungicides are transported and conducted from the bottom up, that is, from the root of the plant to the top of the plant, to the parietal leaf, the parietal bud, the leaf category and the leaf margin.

However, the spray on the leaf surface only stays on the leaf, cannot reach the root of the plant, and will not affect the root disease.Non-endogenous fungicides do not enter the plant body, can not be transported to the surrounding conduction, not to root disease prevention.Therefore, in order to solve the root disease also depends on root irrigation and other ways, directly to the role of agents on the disease site, to receive good control effect.

15, do not indiscriminate use of rooting agent

As the saying goes, the root is the basis of vegetable growth, deep roots to leafy.Although many vegetable farmers know this, they ignore the balance between root and leaf, regard rooting agent as a panacea, and misapply rooting agent.The results were as follows: slow seedling growth, rooting agent irrigation;Control root diseases, reduce dead plants also irrigation rooting agent;Seedling leaves thick green, thick stem, growth too slow also irrigation rooting agent;Rooting agent is used whenever abnormal growth of vegetables is found.

We say that the effect of rooting agent is to promote the growth of root system and adjust the proportion of root and leaf when the root is weak and leafy.Therefore, when rooting agent is used, it should be when the leaves are better and the root system is weaker, and the water and fertilizer absorbed by the root system cannot meet the needs of the leaves, such as when the root system is injured due to winter watering, or when the proportion between the root system and the leaves is out of balance due to the plants growing in winter.