As the temperature gradually rises, the tomato plants begin to gradually enter normal growth, but it still needs a period of recovery. The management should grasp the following points.
temperature. The temperature rise is beneficial to the growth of vegetables, but it is not as good as it gets. The temperature should be adjusted according to the habit of the vegetables. Tomatoes are warm, happy vegetables. The temperature is 20-28°C during the day and 12-16°C at night. However, it was discovered recently that the temperature management of some vegetable farmers was not in place. The temperature of the greenhouses exceeded 32°C, which was unfavorable to the growth of tomatoes. It is recommended that vegetable growers, after the morning grass rakes pull up, the temperature exceeds 30 °C began to release air, below 20 °C and then close the air outlet temperature. If you look at the management of the day, it may be released several times a day, or it may be put only once.
Pest Control. Low temperature and high humidity diseases such as gray mold in spring should be reduced, but the temperature is slightly higher, and diseases with less stringent humidity requirements will be aggravated, such as leaf mold, powdery mildew, root knot nematode disease. Then there are insect pests such as whitefly, aphids, and Liriomyza sativae. For these diseases and pests should be early prevention and treatment, leaf mold can be used 60% anti-mildew Bao (carbendazim hydrochloride) 500 times, 25% azoxystrobin suspension 800 times, 25% tebuconazole 2500 - 3000 times liquid, 25% oxazole 800 times and 2% kasugamycin 300 times spray control, pay attention to alternate medication, continuous 2-3 times. Powdery mildew can use the following agents, 10% Difenoconazole microemulsion 2000 times, 50% Dimethyloxime dry suspension 3000 times, 30% Tetrafim (Foxconazole) 2000 times spray control, continuous 1- 2 times. The root-knot nematode disease uses more than 750 grams of blessing per acre, mixed with a small amount of fine soil sprinkled around the plants, and after watering; or 1.8% of the Ainol 3 with water, 1 kg per mu, valid for 2 months. Insect pests can be trapped and killed by yellow plates. They are economical, safe, and effective. They can be hung with 50 pieces per mu. They can also be used as additive attractants. These insecticidal methods are the best methods in the greenhouse in early spring.
Graze grass warmer. Temperature management is important, but science should not be copied. Shed shape is not the same, lighting and insulation are not the same, high temperature vegetables and hi-temperature vegetables are not the same, it is not the same as laying grass tweezers. The scientific approach is to determine the time of day and time of putting grass in accordance with the insulation effect of the greenhouse. The principle is to pull the temperature of the greenhouse to 12-15°C in the morning. If the nighttime temperature exceeds 12°C, do not leave the grasshopper.
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