Pesticide appearance identification method

(1) Phoxim: colorless, slightly pungent medicinal liquid; (2) enemy kill: light yellow or brown liquid with slight smell; (3) copper sulfate: blue sky Scorpion, odorless; (4) Carbendazim: white or off-white powdery powder, slight odor; (5) Mayamsone: white powder with pepper-like odor; (6) Dixon: red solid Powdery; (7) Topotecan: yellow powder, slightly pepper-like smell; (8) Zhicao Dan: light yellow, smelly liquid; (9) trifluralin: red liquid, after the water was presented Yellow; (10) Bendazone: light yellow liquid with pepper-like odor; (11) butachlor: light blue liquid with aroma; (12) Dimethoate: light yellow, with rancid odor liquid.

The meaning of the letters on the pesticide label

(1) pH: It indicates the pH value. When the PH value is equal to 7 is neutral, and when it is greater than 7, it is alkaline. The larger the number, the stronger the alkalinity. Less than 7 is acidic, the lower the number, the stronger the acidity; (2) PPm: million parts. That is, 1 million doses of medicinal liquid, pesticides containing pesticides; (3) PC: Percentage concentration: (4) Ai: the active ingredient of the pesticide; (5) RD: the lethal dose of animal; (6) RD50: 50% The dose of death; (7) ED: lethal dose of bactericidal; (8) B: Baume degree, is based on the determination of the amount of drug liquid solubility rate Baume. Generally less used, can be found in the Baume degree table; (9) MAC: maximum allowable concentration; (10) Wt: weight; (11) SG: specific gravity; (12) SP: water-soluble powder; (13) EC: Emulsifiable concentrate; (14) C: Granules: eg 5% C(g) ie 5% granules.

Vegetable preservation period

There is a great relationship between the germination rate of vegetables and the age of preservation. Different types of vegetables have different shelf life. (1) Tomato: generally can be stored for 3-4 years, the longest is not more than 4 years, otherwise it will reduce the bud rate, the method of identifying new and old seeds, there is a new hair on the seeds, and there is tomato flavor, the old skin outer hair less hair or Fall off. (2) Cucumber: The maximum storage time is 2-3 years. When it exceeds this period, the bud rate is generally reduced by 20-30%. Even if it can emerge, some of them often have no true leaves after emergence and are not easy to survive. (3) Eggplant: Seeds with a shelf life of generally less than 6 years can be used. The new seeds are shiny and the old seeds are reduced in gloss according to the shelf life. (4) Pepper: Can not exceed 3 years, otherwise the bud rate is reduced, the bud rate after 2 years of storage is reduced by about 10%, the storage is reduced by 30% after being stored for 3 years, the new seeds are golden yellow, and the seeds are apricot yellow. (5) Onion Seeds: Vaccinated onions in summer must be seeded with new seeds in the current year. If old seeds are used, the onion will pick up moss and seeds. Spring onions can use the seeds produced in the first year. (6) Parsley: Must be stored for one year before use, but do not store more than three years. Otherwise the scent becomes smaller. (7) Celery: It can be stored for 3 years. The seeds of the end of the year cannot be used and must be stored for one year. (8) Amaranth: New seeds are good in the current year, and the germination rate is greatly reduced if stored for two years. (9) Cabbage: It can be stored for two years. The seeds that were harvested in that year can be sown in the same year. However, if it exceeds two years, the emergence rate is reduced by 20-30%, and the disease resistance is low.

Tomato flowers, cloudy and sunny whether there is a big difference?

In general, sunny days have a good effect. In contrast to the cloudy days, the temperature is relatively low. If the same concentration is used, the phenomenon of dryness, falling flowers, malformed fruit, and slow growth will occur. The main reason is that the concentration is not suitable, and the concentration should be reduced according to the increase of the ambient temperature.

The tomato in the greenhouse is covered with 2.4-D, usually the concentration of the first flower is 20 mg/kg. The second order flower was 15 mg/kg, and the third order flower was 10 mg kg.

The method of flowering is also very important. Generally, most flowers are planted. When there are 3-4 words in the same inflorescence, they can be opened once. Each flower can be stained with auxin and it will become distorted. In the use of auxin can be added a little red advertising color, the flowers have been marked, the stained time should be from 9:30 am to 10:30 divided into good.

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