The management of oil sunflower in the later period is mainly to promote flowering and fruiting. It is necessary to scientifically control water, prevent and treat diseases, and promote large and large grain and grain filling. The management technology is introduced as follows:
First, topdressing When the plant height is about 55 centimeters long, combined with the last cultivator, ditch the soil, Mu recovery 10 kg of urea.
Second, irrigation should be based on climatic conditions, soil moisture amount of irrigation, noodles, temporary wilting occurs in the leaves, sooner or later, when the normal irrigation water (usually at the end of the bud or flowering), need to be thoroughly perfused. Irrigation of the second water every 10 to 15 days. In the formation of grain to maturity, it is necessary to irrigate 2 to 3 times, and the last water is usually fed 15 days after the final flowering.
Third, the main disease prevention
1. Oil sunflower downy mildew control. In the early stage of disease, spray 58% metalaxyl MnZn WP 1000 times solution, or 25% metalaxyl WP 800 to 1000 times solution, spraying 30 kilograms of liquid per acre, control 1 or 2 times, interval 7 to 10 days.
2. Oil sunflower sclerotinia prevention and treatment. Oil sunflower has strong resistance to pests but is sensitive to sclerotinia. At the beginning of the disease, use 70% thiophanate-methyl or sclerotinia WP 1000 times to spray 30 kg of liquids per mu. Or in the onset period with 50% saccharine net 500 times or 50% ethylene nucleus Lee 800 to 1000 times liquid, even spray 2 times, interval 7 days.
Fourth, timely harvest When the whole field oil sunflower disk on the back yellow, yellow stem curved, the upper and middle leaves turn green and yellow, the skin exhibits the inherent color and markings of this species, when the grain becomes hard artificial harvest; when the plant stem Yellowing, the leaves withered or sagging, the disk yellow-brown, lingual flowers withered off, hard skin when the mechanical harvest. Immediately after harvest, spread on the drying field, dry, and cleanse the net to prevent mildew.
Potassium Ethoxide CAS No.917-58-8
Potassium Ethylate Basic Information
CAS: 917-58-8
MF: C2H5KO
MW: 84.16
EINECS: 213-029-0
Mol File: 917-58-8.mol
Potassium Ethylate Chemical Properties
Melting point 250°C (dec.)
Boiling point -78.5°C (rough estimate)
density 0.894 g/mL at 25 °C
refractive index n20/D 1.39
storage temp. Flammables area
solubility Soluble in ethanol, ether
form Powder
color white to off-white
Water Solubility It reacts vigorously with water.
Sensitive Moisture Sensitive
Stability: Stable, but highly flammable. Reacts violently with water. Contact with damp air may lead to heating of the solid, which could in turn ignite it, or materials with which it is in contact. Incompatible with air, water, moisture, acids, acid chlorides, acid anhydrides, oxidizing agents, reducing agents.
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