How to use pesticides and fertilizers for green vegetables

1. The use of pesticides

(1) Priority should be given to agricultural measures and comprehensive prevention and control. 1 Select excellent disease-resistant and insect-resistant varieties. 2 Rotation and intercropping can be used to prevent pathogenic bacteria and eggs from accumulating in large numbers and play a role in controlling the occurrence of pests. 3 Strengthen field management. 4 Treat seeds with no chemicals, soak the seeds with warm soup and hot water, and disinfect the seeds. 5 Remove the diseased plant before planting. 6 rational close planting, weeding and weeding. 7 Adopt insects and artificial auxiliary pollination and other measures.

(2) Use physical control techniques. 1 The use of pest coloring, phototaxis trapping. The yellow armyworm board was used to trap and kill the aphids and whitefly; the blue armyworm board was used to trap and kill the thrips. Insect pests such as Plutella xylostella, Brassica napus, and Spodoptera exigua are ensnared by a frequency-vibrant insecticidal lamp (or a high-pressure mercury lamp or a black light lamp). 2 Cover 40 to 60 mesh insect nets at the air outlet and shed door to prevent pests from flying. 3 Use silver gray reflective film to avoid aphids. 4 Manually remove diseased leaves, diseased fruits, pest egg pieces, and capture larvae for centralized destruction.

(3) Scientific and rational use of chemical pesticides, and the use of biological pesticides. The production of green food vegetables using pesticides must comply with the following principles.

Prohibited use of pesticides: 1 The use of pesticides that are highly toxic, highly toxic, highly residue, and have "triple causes" (carcinogenic, teratogenic, mutagenic) effects are prohibited. 2 The use of transgenic engineering products and preparations is prohibited. 3 The use of organic synthetic plant growth regulators is prohibited.

The use of pesticides is permitted: 1 The use of moderately toxic plant-based pesticides, animal-derived pesticides, and microbial-derived pesticides is permitted. 2 Allow limited use of some organic synthetic pesticides. Choose low-toxicity and moderately-toxic pesticides. Each organic synthetic pesticide is allowed to be used only once during the growing period of a crop. The application method (application amount, application method, withdrawal date, pesticide maximum residue value, etc.) shall comply with the relevant national regulations. Standard "Pesticide Safety Use Standard" GB4285 and "Pesticide Fair Use Guidelines 1-5" GB8321. 1-5. 3 Pyrethroid pesticides are only allowed to be used once during the crop growth period. 4 Strict implementation of pesticide safety intervals, strict control of the number of applications, content range and dose, the use of China Agricultural Network Scientific Application of pesticides.

2. The main points of the use of fertilizer in the production of green food vegetables are as follows: How to increase the utilization of chemical fertilizers?

(1) Promote the use of organic fertilizers and biological fertilizers. They have a comprehensive nutrient content, a long-lasting fertilizer effect, which is conducive to ecological balance, rational use, timely and appropriate fertilization, and scientific fertilization methods.

(2) Allowable fertilizers. 1 Give priority to organic fertilizers and farmyard fertilizers. Farmyard manure, human and animal dung need to be decomposed and used after harmless treatment. 2 For the use of chemical fertilizers, it can be used in conjunction with organic fertilizers, and the ratio of inorganic nitrogen to organic nitrogen does not exceed 1:1. For example, 1000 kg of high quality manure can be used with 10 kg of urea. 3Straw returned to the field.

(3) Prohibited fertilizers. 1 The use of nitrate nitrogen fertilizers (eg, potassium nitrate, ammonium nitrate, etc.) is prohibited. 2 It is forbidden to use municipal wastes and sludges, hospital wastes, and industrial wastes containing harmful substances (such as toxic gases, pathogenic microorganisms, heavy metals, etc.). 3 The use of genetically engineered products is prohibited. 4 It is forbidden to use unfamed human waste. 5 It is prohibited to use uncooked cake fat.

(4) Attention should be paid to the use of fertilizers. 1 Fertilizers containing chlorine should not be used in vegetable cultivation. 2 In mixed fertilizers (such as vegetable-specific fertilizers), it should be checked whether the above-mentioned banned fertilizer components are included in the composition of fertilizers. 3 The last topdressing of leafy vegetables must be carried out 30 days before harvest. 4 farmyard fertilizer, in principle, on-site production use. Commercial fertilizers and new fertilizers must pass the registration certification and production licenses of the relevant state departments, and the quality indicators should meet the requirements of the relevant national standards.

High Precision Distance Sensor

Laser range sensors combine the advantages of a visible red sensing beam with the increased range of a laser. The optical distance sensor devices are Class 2 lasers, support Class 1 customized. The high precision autonics distance sensor is successfully be used to connect to Arduino, Raspberry Pi, with +-1mm to 3mm high accuray, and long-range solutions (max up to 150m) for your application.

Precision Distance Sensor,Precision Laser Distance Sensor ,Precision Distance Sensor Laser,Accurate Laser Distance Sensor

Chengdu JRT Meter Technology Co., Ltd , https://www.rangingsensor.com