In order to give full play to the effective role of pesticides and to prevent possible harms, chemical pesticides must be applied as efficiently as possible: high-efficiency, low-toxicity, low-residue pesticides; advanced and reliable pesticide application equipment; safe and rational application methods. Conditions. Therefore, the application of pesticides to control pests and diseases must use special plant protection tools to carry out operations. The pesticide-free plant protection mechanization technology provides an effective means for the prevention and control of large-scale, high-effective and low-residual pests, and can achieve low pesticide dosage, uniform spraying, and high atomization. The liquid medicine is covered with dense leaf stalks, which has a good control effect, and also reduces the poisonousness that the mist may have on the applicator.
First, spray powder mechanization technology Spray dust machine features: in a variety of operations, there is a common power, medicine boxes and air supply device, that is, fans and air flow delivery system; general parts of the general; equipped with a variety of injection parts , Injection unit interface size standardization, convenient and reliable replacement, compact structure, reasonable cost and wide adaptability. Its advantages are: long range, high ergonomics, comprehensive prevention and control of agroforestry crops.
The mist spraying operation of the Knapsack spray duster series: Two-stroke gasoline with high-speed fan operation generates airflow. Most of the airflow passes through the spraying part at the outlet of the mist nozzle, and is atomized under the impact of high-speed airflow to form a high-speed mist flow. Its fog particle spectrum is generally in the range of 30-150um with an average diameter of 90-120um. If the Knapsack working machine is replaced with related parts, the corresponding dusting operation can be performed.
The AG-type shoe pump sprayer developed in Wuhan, Hubei, and its large-scale garden planter spray duster are being applied and have obtained a number of national patents.
Second, the ultra-low-volume spray mechanization technology (a) the characteristics of ultra-low-volume spray mechanization technology The characteristics of ultra-low-volume spray technology identified in our country are:
1. Fine mist flow, high concentration, good penetrability in crops, long time, good control effect;
2, Compared with conventional spray, it can save 10%-30% of pesticides, and the amount of liquid to be sprayed is small, so that the amount of drug lost to the ground is relatively reduced, and the environmental pollution is reduced, the spray volume is small, the water is less, and the amount of medicament is reduced. When waterworks are added, they can prevent and control sudden large-scale insect pests in a timely manner, and be suitable for large areas such as aerial sprays, arid areas and forestry.
(b) Ultra-low spray rate commonly used in China
1. Centrifugal, high-speed air atomization and hydraulic atomization are divided from the principle of atomization.
2, from the carrying way divided into hand-held or portable, backpack and stretcher type, vehicle-mounted and aircraft loading;
3. There are hand-type, motor-type and electric-type points on the atomization power;
4. The deposition methods from the droplet to the target include direct injection impact, drift deposition, and electrostatic deposition. At present, the centrifugal atomizer type is more popularized and applied.
(3) Two types of typical ultra-low-volume sprayer models
1. Hand-held ultra-low-volume sprayer. This small sprayer is mostly driven by a micro DC motor-driven turntable, such as the Shanghai 3WCD-5A electric ultra-low-volume sprayer.
2, medium-sized ultra-low volume sprayer, generally use 1-3KW gasoline engine for power, such as Beijing's production of WFB-18AC ultra-low-volume sprayer and Dongfanghong -18 type backpack ultra-low volume sprayer.
(IV) Measures related to the implementation of ultra-low volume spray technology The main relevant measures are:
1, choose pesticides;
2, determine the pesticide and dosage suitable for ultra-low volume spray
3, ultra-low volume spray;
4, master the correct method of spraying;
5. Selected spray operation parameters: walking speed: 0.4-0.8m/s for paddy fields, 0.8-1.2m/s for dry lands, 0.6-1m for spray heads from crops, and leveling of sprinklers or 5°-10° elevation angles. Make the head height 0.5m above the top of the crop. Effective spray rate: Hand-held sprayer rice fields take 4-6m, dry land take 3-5m. Its dosage formula is: dosage (ml/hm) = flow rate (ml / s) / walking speed (m / s) * effective spray (m) * 100 (Tu Tongming)
First, spray powder mechanization technology Spray dust machine features: in a variety of operations, there is a common power, medicine boxes and air supply device, that is, fans and air flow delivery system; general parts of the general; equipped with a variety of injection parts , Injection unit interface size standardization, convenient and reliable replacement, compact structure, reasonable cost and wide adaptability. Its advantages are: long range, high ergonomics, comprehensive prevention and control of agroforestry crops.
The mist spraying operation of the Knapsack spray duster series: Two-stroke gasoline with high-speed fan operation generates airflow. Most of the airflow passes through the spraying part at the outlet of the mist nozzle, and is atomized under the impact of high-speed airflow to form a high-speed mist flow. Its fog particle spectrum is generally in the range of 30-150um with an average diameter of 90-120um. If the Knapsack working machine is replaced with related parts, the corresponding dusting operation can be performed.
The AG-type shoe pump sprayer developed in Wuhan, Hubei, and its large-scale garden planter spray duster are being applied and have obtained a number of national patents.
Second, the ultra-low-volume spray mechanization technology (a) the characteristics of ultra-low-volume spray mechanization technology The characteristics of ultra-low-volume spray technology identified in our country are:
1. Fine mist flow, high concentration, good penetrability in crops, long time, good control effect;
2, Compared with conventional spray, it can save 10%-30% of pesticides, and the amount of liquid to be sprayed is small, so that the amount of drug lost to the ground is relatively reduced, and the environmental pollution is reduced, the spray volume is small, the water is less, and the amount of medicament is reduced. When waterworks are added, they can prevent and control sudden large-scale insect pests in a timely manner, and be suitable for large areas such as aerial sprays, arid areas and forestry.
(b) Ultra-low spray rate commonly used in China
1. Centrifugal, high-speed air atomization and hydraulic atomization are divided from the principle of atomization.
2, from the carrying way divided into hand-held or portable, backpack and stretcher type, vehicle-mounted and aircraft loading;
3. There are hand-type, motor-type and electric-type points on the atomization power;
4. The deposition methods from the droplet to the target include direct injection impact, drift deposition, and electrostatic deposition. At present, the centrifugal atomizer type is more popularized and applied.
(3) Two types of typical ultra-low-volume sprayer models
1. Hand-held ultra-low-volume sprayer. This small sprayer is mostly driven by a micro DC motor-driven turntable, such as the Shanghai 3WCD-5A electric ultra-low-volume sprayer.
2, medium-sized ultra-low volume sprayer, generally use 1-3KW gasoline engine for power, such as Beijing's production of WFB-18AC ultra-low-volume sprayer and Dongfanghong -18 type backpack ultra-low volume sprayer.
(IV) Measures related to the implementation of ultra-low volume spray technology The main relevant measures are:
1, choose pesticides;
2, determine the pesticide and dosage suitable for ultra-low volume spray
3, ultra-low volume spray;
4, master the correct method of spraying;
5. Selected spray operation parameters: walking speed: 0.4-0.8m/s for paddy fields, 0.8-1.2m/s for dry lands, 0.6-1m for spray heads from crops, and leveling of sprinklers or 5°-10° elevation angles. Make the head height 0.5m above the top of the crop. Effective spray rate: Hand-held sprayer rice fields take 4-6m, dry land take 3-5m. Its dosage formula is: dosage (ml/hm) = flow rate (ml / s) / walking speed (m / s) * effective spray (m) * 100 (Tu Tongming)
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