Prevention and treatment of greenhouse vegetable root knot nematode special effects medicine - blessing more
It is a non-fumigated, high-efficiency, low-toxicity, low-residue environment-friendly nematicide that is developed by the Japanese Ishihara Sangyo Co., Ltd. In 2002, it was the first to obtain registration on vegetables (cucumber, tomato). It is one of the few nematicides currently registered on vegetables and is particularly suitable for the production of uncontaminated greenhouse vegetables.
First, product performance characteristics
1. The blessing has more excellent contact performance. When the dosage is used up to the recommended dosage, the nematode can be killed when the drug is contacted with the nematode. The soil can maintain an effective lethal concentration for 2 months.
2. The blessings have a strong internal absorption conductivity, vegetable roots absorb the agent, can maintain effective concentration in the plant for a long time, once the nematode enters the roots, it will be killed, therefore, blessing more control of nematode damage time is very long.
3. A large number of experimental applications showed that the control effect of blessing more stable at 85% to 95%, significantly better than the commonly used control effect of avermectin 65% to 80%.
Second, the best medication period
The best medication period should be mastered: on the day when the transplanting is determined, the day of medication, the day of soil mixing, the day transplanting, the day of the cover film (film), the interval between drug use and transplanting should be as short as possible.
Third, the best way to use drugs
1. Generally 5-7 days after transplanting is the peak period of invasion of the nematode into the roots, therefore, to use the nematode has not invaded the roots or has not invaded before the formation of giant tumor cells, let the roots absorb the agent, thus killing the nematode or Prevent invading nematodes. If the nematode is found to have been harmed (a root knot) after a certain period of time after transplanting, the use of good fortune is much more effective, and the control effect is greatly reduced, and the effective time for controlling nematode damage will be shortened. Therefore, it is recommended before transplanting.
2. The best way to use the blessing is to thoroughly mix the drugs. The specific method is as follows: Firstly mix the well-balanced blessing with 4 times the weight of fine soil or sandy soil, mix it evenly on the surface of the soil that has been turned over, and then immediately mix the soil up and down (the depth is 15— 20 cm).
3. The use of comprehensive soil-mixing, good control, long control time, and one growth season can achieve ideal results.
4. Some vegetable farmers are more convenient for the map, and adopt centralized administration methods such as spraying and acupuncture, and the control effect is worse than that of comprehensive soil mixing. If it is necessary to adopt a centralized medication, it is recommended that the width of the ditch should be 20 cm (applied on both sides of the plant), medication should be used twice, and the interval between the second administration should be 50-60 days. When the second medication is applied, it should be applied in the vicinity of the new root of the plant.
Fourth, the best dosage
The total amount of medicine used in the soil (the most effective for controlling nematodes) is 1.5-2 kg per 667 square meters; the amount of mixed soil or mixed soil applied to the surface soil is 0.67-1 kg per 667 square meters.
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