When is the best time to spray pesticides in summer?

It is true that pesticides should be sprayed when mosquitoes are common in summer, but spraying pesticides also requires certain skills. The method is wrong, the effort is in vain, this sentence has long been known to everyone, so we must master certain methods and skills, so that we can spray pesticides will play a greater effect, can allow us to do more with less, not with half the effort. <>

First of all, it is arranged from the part of the weather. When we spray pesticides in summer, it is best to choose in the afternoon, that is to say, after 5:00, this time period is more appropriate.

The reason why we do not choose morning or noon is mainly to avoid high temperature in direct sunlight, thereby increasing the volatilization of pesticides. Pesticides it takes 4 to 6 hours of absorption, so spray in the morning, then there will be sun exposure at noon, then the efficacy may be reduced, spray at noon and easy to get tired, it is not appropriate to choose, at this time the afternoon is just right, after all, it can be absorbed in the evening and evening for a night. <>

If it is rainy weather, it is not suitable to spray pesticides, and it needs to be delayed appropriately, and if it starts to rain that night after spraying pesticides, then it is necessary to spray pesticides for the second time. Pesticides are soluble in water, after all, pesticides are wet with water, and after rainwater, the pesticides remaining on vegetables and weeds will be diluted. <>

In addition, pesticides also have certain requirements for some insect pests, there are many insects that are basically infested in the evening, and some are infested in the morning, and the pesticide spraying time can be selected according to the infestation time of insects. Like this caterpillar is basically more active in the morning and evening, then we should spray pesticides according to the time of the caterpillar, if the caterpillar hides in this crop, then our pesticides can not play a good role, so we should choose to spray pesticides during their active time period.

At 5:00 a.m. to 6:00 p.m. and 7:00 p.m

00 8:00, 1:00 p.m. 2:00

00, 3:00 p.m. 4:00 p.m., it is best to encounter pesticides during these times, and the effect is also very good.

Generally, it is during the growth period of the plant, and it is best to spray it in the morning or evening, which can have a better effect.

Spraying pesticides should be done at 10:00 a.m. or 4:00 p.m., because the light is not particularly strong at this time.

1. Fungicides.

75 chlorothalonil wettable powder at an interval of 5---7 days.

77 can kill WP for 3---5 days.

50% promethane wettable powder at intervals of 5---7 days.

70% Methyltropia WP 5---7 days apart.

58% Ruixin mildew wettable powder 3---5 days apart.

50% Nonliline WP is available at intervals of 5---6 days.

64% alum wettable powder interval 4---5 days.

65% carbendazim wettable powder with an interval of 18-21 days.

80% Bordeaux liquid wettable powder 15 days apart.

20% benzoconazole wettable powder at intervals of 7---10 days.

50% Jincoco wettable powder is available at intervals of 7---10 days.

50% Pythium WP at intervals of 5---7 days.

25% manganese zinc with nail cream 7---10 days apart.

40% fosilazole wettable powder at intervals of 7---10 days.

40% myxamine wettable powder is available at intervals of 7---10 days.

2. Insecticides.

50% Fly Amine 5-7 days apart.

50% emamectin benzoate is given at an interval of 5---7 days.

70% of imidacloprid are spaced 3---5 days apart.

10% cypermethrin spaced 3---5 days apart.

5% aphid-resistant interval 4---6 days.

20% of the excavations are performed at intervals of 3---5 days.

40% of Lesburn are spaced 5---7 days apart.

35% phosphine at 3---5 days apart.

5% of Doraibao is spaced 4---6 days apart.

25% matrine at intervals of 2---3 days.

Generally, pesticides are sprayed not once every few days. Whether it is a plant or a variety of vegetables, it cannot be said that it takes a few days to spray. It's about observing. When there are bugs that eat the leaves or eat the plants. Then you can go for a squirt. Because there is too much spraying. That's not good.

It is better to spray pesticides after rain, because in this case, the pesticides will last longer, and they will not be washed away by the rain, and most of the pests can be solved.

It needs to be determined according to the growth of the plant, and the time of spraying pesticides is completely different for different plants.

It is best to spray pesticides at the seedling stage, but also to prevent some diseases in advance, so that it can also play a good effect.

The use of pesticides is the most common in our planting and production. When we spray pesticides, we should pay attention to the spraying time, which has a great relationship with the control effect of pesticides. The spraying time should be reasonably adjusted according to the changes of the season, especially in the summer.

1. Spraying time

Many people like to spray pesticides in the middle of the day when they spray pesticides in the summer. I think that the temperature at noon is relatively high, and pests are easy to be eliminated, but this is not true. Because at noon, not only is the temperature high, but the light is also very strong.

Pests are generally hidden in the stems and fruits of plants, making it difficult to control them in place. Moreover, the temperature is high at noon, and the pesticide is easy to be decomposed and volatilized after spraying, which cannot achieve the ideal control effect. In addition, after the pesticide is volatilized, if the gas is inhaled into the human body, it is very easy to cause human poisoning.

Therefore, when spraying pesticides in summer, whether it is growing grains or vegetables and fruits, the best time should be around 9 a.m. At this time, the dew gradually dries out, and the temperature is not very high. At the same time, it is also the time when various pests go out to forage and are the most active.

Therefore, if pesticides are sprayed at this time, they will not be washed away by dew, nor will they be evaporated and decomposed due to high temperatures, resulting in a decrease in efficacy. On the contrary, it can also increase the chance of pests being exposed to pesticides. Or spray after 5 p.m., which is the beginning of the active phase of nocturnal pests and can eliminate nocturnal pests.

2. Precautions

1. Concentration of liquid medicine

When spraying pesticides, many farmers will choose to increase the amount of pesticides used and reduce the dilution of pesticides in order to improve the control effect of pesticides. This leads to an increase in pesticide concentrations, and it remains the same in the summer. Because in the environment of strong light and high temperature, the evaporation rate of water is very fast, if the concentration is too high, it is easy to cause pesticide damage to crop leaves.

Then we should pay attention to the selection of pesticide varieties, mainly pesticides with fast acting and strong systemic properties. For example, dichlorvos, socrine, etc., can destroy pests in about two hours after use.

2. Spraying safety interval

When spraying pesticides, we should also pay attention to determining the safe interval of pesticide spraying according to the toxicity of pesticides. Usually, the residual effect period of highly toxic pesticides can reach as long as one month. If it is a low-toxicity pesticide, then it is generally only about a week.

Therefore, whether it is grain or hanging fruit, it is necessary to pay attention to standardizing the use of drugs before harvesting to avoid human and animal poisoning. In the summer, it is necessary to dilute it with sufficient water. When spraying, the sprayer should not be overfilled, and the lid should be tightly closed to prevent the liquid from splashing on the body, resulting in poisoning.

Around 8 a.m. to 10 a.m. and 5 p.m. The best time to spray pesticides in summer, whether for food crops, cash crops or fruit trees, is between 8 a.m. and 10 a.m. and around 5 p.m. At about 9 o'clock in the morning, the general dew has dried, and the temperature is not too high, which is the most vigorous time for sunrise pests to feed, move and mate, so the medication at this time will not reduce the efficacy of the drug because the agent is washed or diluted by the dew, and it will not affect the efficacy of the drug due to the decomposition of the agent due to the high temperature.

At this time, the use of pesticides will increase the chance of pests feeding and contact with pesticides, and effectively improve the lethality of pesticides. At about 5 p.m., the sun has turned west, the light is fading, and nocturnal pests begin to move (feeding, mating and other mobile activities), so spraying at this time also has a high killing effect.

Summer spraying protectionThe chance of poisoning in summer is much higher than in other seasons, so it is necessary to take good precautions and pay attention to safety when spraying. And because the effect of the summer medicine is relatively good, you can increase the dilution ratio in an appropriate proportion, of course, wear protective clothing, wear a mask, this is a must, after spraying, take a bath in time to avoid the impact of residues on health.