Methods of treating insects before planting plants in a greenhouse in Vietnam

Hello, Lawnet would like to answer as follows:

1. What is a greenhouse? What is needed to treat insects in the greenhouse before planting?

According to Section 1.3.1, QCVN 01-112:2012/BNNPTNT stipulates that a greenhouse is a house built with glass or equivalent materials according to the standards of the Plant Quarantine agency.

What is needed to treat insects in the greenhouse before planting?

According to the provisions of Section 3 of Regulation QCVN 01-112:2012/BNNPTNT, to treat insects in the greenhouse before planting plants, the following supplies and equipment are needed:

- Methyl Bromide medicine;

- Plant protection products;

- Sealing materials: paper, glue, nylon, tape;

- Spray bottle, measuring cup 10 - 1000ml, syringe (2, 5, 10 ml);

- Weight: 50 kg;

- Medication tube;

- Drug vapor concentration meter;

- Specialized masks, tools and labor protection;

- Ventilation equipment, air circulation, fans;

- Hydrometer, thermometer;

- Sea of ​​warning;

- Explosion-proof equipment;

- First aid medicine for occupational accidents.

Thus, to carry out insect treatment before planting greenhouse plants, it is necessary to prepare all materials and equipment for the treatment to be most effective.

2. What are the methods of treating insects before planting plants in a greenhouse in Vietnam?

According to the provisions of Section 4 and Section 5 of Regulation QCVN 01-112:2012/BNNPTNT, there are 02 methods of treating insects before planting plants in the greenhouse, as follows:

Greenhouse treatment method with Methyl Bromide

Step 1. Prepare before sterilization

- Destroy or move all plants whose monitoring period has expired out of the disinfection range and clean up their remains.

- Conduct disinfection for each unit in the greenhouse

Step 2. Seal the sterilization scope

- All slots, crevices, and ventilation systems within the disinfection area must be sealed. Use glued paper in positions that need to be sealed, such as gaps between walls, gaps on the roof, gaps between the roof and walls, gaps between walls and floors, and other gaps.

Step 3. Determine drug dosage and incubation time

- Determine the sterilization volume

- Measure the temperature within the sterilization range

- Based on the temperature, the dosage of disinfectant used is as follows:

+ 14 grams/m3/12 hours at temperatures above 30oC

+ 22 grams/m3/12 hours at temperatures from 20-30oC

+ 30 grams/m3/12 hours at temperatures below 20oC

Step 4. Spread the wire and inject medicine

- The medicine wire is inserted into the disinfection range from top to bottom so that the medicine discharge wire end is about 30 - 50cm from the insertion point. Place an auxiliary tube in case the medication tube is clogged.

- Place the drug delivery end outside the disinfection range and seal the gap at the delivery wire end.

- Injecting medicine: Have at least 2 people perform the injection with full labor protection equipment to be able to handle any incidents that occur. During the injection process, the amount of medicine must be adjusted slowly, with an average flow of about 1.5 kg/minute.

- After injecting a sufficient amount of medicine into the disinfection range, check the concentration of medicine vapor with a meter. If there is a shortage, more medicine must be pumped to ensure the correct concentration. Place a danger warning sign in front of the disinfection unit door.

- Measure residual drug vapor within the disinfection area after ventilation. Ensure that the fumigant concentration within the disinfection range reaches a level below the safe threshold for Methyl Bromide: 5.0 ppm (equivalent to 0.02 g/m³ or 20 mg/m³);

- Place warning signs after spraying.

Step 5. Ventilation

- People directly involved in ventilation must wear specialized respiratory protection equipment and choose suitable positions for ventilation.

- Use specialized equipment: Fans, vacuum cleaners, ventilation systems, and the air circulation of vehicles containing sterilized objects for ventilation.

- Ventilation time for incubation is 24 hours.

Step 6. Spray cleaning

- Fully equipped with protective equipment and cleaning spray around the disinfection area after completion.

Methods of treating greenhouses with pesticides

Step 1. Prepare before spraying

- Destroy or move all plants whose monitoring period has expired out of the disinfection range and clean up their remains.

- Conduct disinfection in each unit or the entire greenhouse.

Step 2. Pesticides

- Use broad-spectrum drugs in the list of permitted plant protection drugs issued annually by the Ministry of Agriculture and Rural Development to control insects, spiders and fungal diseases.

Step 3. Spray

- Spray pesticides to kill insects and spiders: Before spraying, check the greenhouse for any insects and spiders and use a special pesticide to eliminate those harmful organisms.

- Spray fungicides 2-3 days after spraying insecticides and spiders:
Before spraying, check the greenhouse to see if there are any diseases or diseases that have appeared on previous plants. Use a specific pesticide to treat that harmful disease.

- Spray the entire inside surface of the treated unit. Spray evenly from inside to outside the door. Spray the pesticide thoroughly into the gaps, crevices, and cracks on the floor, corners, and base of the greenhouse walls.

Step 4. Ventilation

- After spraying, allow ventilation for 1-2 days with fans and natural ventilation systems.

Step 5. Isolation

- After 03 days of drug treatment, plant the plants in the greenhouse.

Thus, according to the above regulations, implementing the correct methods and procedures will help thoroughly handle harmful insects in the greenhouse, ensuring a safe and effective growing environment.

More details can be found in Regulation QCVN 01-112:2012/BNNPTNT.

Best regards!

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