Pest control is an important part of orchard management and the focus of fruit tree management throughout the year. At present, some fruit farmers are not spending less money on pest control every year, but their strength is not as good as it is. In addition to the reasons why the pesticides selected by the farmers are not symptomatic and the quality of the pesticides is not high, improper spraying measures are also one of the important reasons for the difficulty in exerting the efficacy.
Problems in orchard spraying
1. Randomly increase the concentration, spray at a close distance, affecting the uniform coverage of the liquid medicine. Some farmers' friends are affected by the bad spraying habits. When encountering pests and diseases that are difficult to control, they often only increase the dosage, and do not increase the water consumption, resulting in the liquid medicine. The concentration is increased, and the amount of the liquid is small, and it is difficult to spray evenly on the fruit trees, which affects the control effect and even causes phytotoxicity. There are also some fruit growers who are too close to the fruit trees when spraying, and the leaves of the fruit trees are turned up under the impact of high pressure, which is easy to damage the fruit surface.
2. Spraying pesticides like washing trees Some fruit growers think that the more the medicine is sprayed, the better, like to spray the fruit trees to drip the leaves, thinking that this is good. But counterproductive, the pests and diseases are not washed down by the syrup, but by the internal suction, contact killing, fumigation and killing. The water is easy to make the plant stomata closed, but the absorption is less, the water is more, this kind of spraying method is wasteful, investment Large, poor results. Moreover, it is easy to cause too much liquid to be accumulated in the fruit, and long-term accumulation is likely to cause phytotoxicity and affect the quality of the fruit.
3. The pressure of the manual sprayer is too small, the spray hole of the motorized sprayer is too large, the atomization effect is poor, and the distribution density of the mist droplet is reduced. The manual atomizer adopts the liquid atomization method, and some domestic sprayer manufacturers, especially some small-scale production enterprises Due to the limitations of their own technical conditions, the pressure of the sprayer produced does not meet the requirements. When spraying pesticides, fruit growers often cause crowns and canopy in the inner hall due to low pressure, and spray spray is formed. The motorized sprayer adopts pneumatic atomization. Some farmers’ friends want to save time, especially those who provide paid services. Spraying efficiency, often intentionally puncture the nozzle gasket, it is not known that after such transformation, the efficiency is improved, but the atomization effect is reduced, which will inevitably affect the control effect.
Measures to change the orchard spray
1. Change the spraying habits and improve the quality of spraying according to the size of the fruit trees, the number of leaves, and the reasonable control of water consumption. The spraying should be even and thoughtful. From top to bottom, from the inside to the outside, the front and back of the blade should be sprayed with liquid medicine. Can not leak spray, can not be re-sprayed, the blade is fully wet, and it will not form a flowing water droplet as well, so that the branches do not leak, the leaves are medicine, and the flow is not flowing.
2. Improve the spraying measures to improve the atomization effect. First, use the manual sprayer as little as possible. The manual sprayer not only has high labor intensity, but also has low speed and low efficiency, and the pressure is small and the atomization effect is poor. The second is to replace the spray gun that is currently used, and replace the spray gun with only one spray hole with the spray head with two or three spray holes, so that the atomization effect is good, the spray is even, and there is no damage to the fruit surface.
3. Master the spraying technique and improve the spraying technology. The pressure of the sprayer should be normal and balanced, the pressure is too small, and the atomization effect is poor; the distance is too close, and it is easy to stab the fruit surface. Peasant friends must be clear that the high-pressure liquid must pass through the nozzle hole for more than 40 cm to completely atomize when spraying. Therefore, the distance between the nozzle and the crop must be kept at 50 cm when spraying. The larger the angle of the mist cone, the finer the droplets. Conversely, the smaller the angle of the mist cone, the thicker the droplets. It should be remembered that the pressure of the sprayer, the angle of the nozzle and the distance from the crop are directly related to the uniformity and coverage of the liquid.
Author: Songji Wen
Source: Shaanxi Science and Technology News
Problems in orchard spraying
1. Randomly increase the concentration, spray at a close distance, affecting the uniform coverage of the liquid medicine. Some farmers' friends are affected by the bad spraying habits. When encountering pests and diseases that are difficult to control, they often only increase the dosage, and do not increase the water consumption, resulting in the liquid medicine. The concentration is increased, and the amount of the liquid is small, and it is difficult to spray evenly on the fruit trees, which affects the control effect and even causes phytotoxicity. There are also some fruit growers who are too close to the fruit trees when spraying, and the leaves of the fruit trees are turned up under the impact of high pressure, which is easy to damage the fruit surface.
2. Spraying pesticides like washing trees Some fruit growers think that the more the medicine is sprayed, the better, like to spray the fruit trees to drip the leaves, thinking that this is good. But counterproductive, the pests and diseases are not washed down by the syrup, but by the internal suction, contact killing, fumigation and killing. The water is easy to make the plant stomata closed, but the absorption is less, the water is more, this kind of spraying method is wasteful, investment Large, poor results. Moreover, it is easy to cause too much liquid to be accumulated in the fruit, and long-term accumulation is likely to cause phytotoxicity and affect the quality of the fruit.
3. The pressure of the manual sprayer is too small, the spray hole of the motorized sprayer is too large, the atomization effect is poor, and the distribution density of the mist droplet is reduced. The manual atomizer adopts the liquid atomization method, and some domestic sprayer manufacturers, especially some small-scale production enterprises Due to the limitations of their own technical conditions, the pressure of the sprayer produced does not meet the requirements. When spraying pesticides, fruit growers often cause crowns and canopy in the inner hall due to low pressure, and spray spray is formed. The motorized sprayer adopts pneumatic atomization. Some farmers’ friends want to save time, especially those who provide paid services. Spraying efficiency, often intentionally puncture the nozzle gasket, it is not known that after such transformation, the efficiency is improved, but the atomization effect is reduced, which will inevitably affect the control effect.
Measures to change the orchard spray
1. Change the spraying habits and improve the quality of spraying according to the size of the fruit trees, the number of leaves, and the reasonable control of water consumption. The spraying should be even and thoughtful. From top to bottom, from the inside to the outside, the front and back of the blade should be sprayed with liquid medicine. Can not leak spray, can not be re-sprayed, the blade is fully wet, and it will not form a flowing water droplet as well, so that the branches do not leak, the leaves are medicine, and the flow is not flowing.
2. Improve the spraying measures to improve the atomization effect. First, use the manual sprayer as little as possible. The manual sprayer not only has high labor intensity, but also has low speed and low efficiency, and the pressure is small and the atomization effect is poor. The second is to replace the spray gun that is currently used, and replace the spray gun with only one spray hole with the spray head with two or three spray holes, so that the atomization effect is good, the spray is even, and there is no damage to the fruit surface.
3. Master the spraying technique and improve the spraying technology. The pressure of the sprayer should be normal and balanced, the pressure is too small, and the atomization effect is poor; the distance is too close, and it is easy to stab the fruit surface. Peasant friends must be clear that the high-pressure liquid must pass through the nozzle hole for more than 40 cm to completely atomize when spraying. Therefore, the distance between the nozzle and the crop must be kept at 50 cm when spraying. The larger the angle of the mist cone, the finer the droplets. Conversely, the smaller the angle of the mist cone, the thicker the droplets. It should be remembered that the pressure of the sprayer, the angle of the nozzle and the distance from the crop are directly related to the uniformity and coverage of the liquid.
Author: Songji Wen
Source: Shaanxi Science and Technology News
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