Techniques for preventing and controlling strawberry gray mold
Harmful symptoms. Strawberry botrytis mostly begins to occur after the deflowering. The pathogen first infects the small fruit, so that the fruit surface exposed to the wet soil first develops the disease, and then spreads along the fruit stem to the inflorescence, causing the entire inflorescence to rot and die; the fruits are invaded and the fruit surface is invaded. There was water-stained, hazel-like patches, dark brown afterwards, and soft rot in the tissues. The fragrance disappeared. In wet conditions, the diseased mice had gray mold. Fruits that are susceptible during the growing season continue to rot after harvest.
Occurrence of law. Strawberry gray mold is a fungal disease caused by infection with Botrytis cinerea. The pathogenic bacteria overwintered on the damaged plants and formed spores in late spring conditions, spreading with the wind. The optimum temperature for the development of germs was 20-25°C, the lowest 4°C, and the highest 30-32°C. Conidia germinated at 13.7-29.5°C, but germination was favorable at lower temperatures. The occurrence of diseases is closely related to environmental conditions. Low temperature and high humidity are the dominant factors of disease epidemic; planting too dense, partial nitrogen fertilizer, excessive plant growth, lack of light in the garden, continuous rain, poor drainage in the garden, and high ground humidity are all suitable for disease occurrence. In the early to middle stage, fruit coloring is the weakest and most susceptible to disease. In addition, the degree of morbidity is also related to the variety.
Control methods: 1, selection of disease-resistant varieties. 2. Agricultural control: timely removal of dead leaves and dead leaves in early spring, removal of diseased inflorescence at the early stage of disease, elimination of disease, reduction of bacterial sources, rational close planting, balanced fertilization, and proper control of watering to prevent plant growth and excessive humidity in the garden Use plastic film or firewood to cover the ground to avoid direct contact of the fruit with moist soil. 3. Chemical control: starting from the inflorescence exposure, 200 times equal amount of Bordeaux mixture, 50% dexamethasone 500 times, 50% diuretic 600 times, 75% chlorothalonil 600 to 800 times, 50% Sulfamethoxone or 70% thiophanate-methyl 800 to 1000 times fluid, 10% polyoxymethylenemycin wettable powder 100 to 150 g/mu water 75 kg, 50% acetaminophen wettable powder 100 to 135 g/mu + Water 75 kg and other agents, spray once every 7 to 10 days, a total of 3 to 4 times; prevention and treatment of greenhouses or strawberry greenhouse gray mold, can use antibacterial Ling fumigation, 0.1 g per cubic meter of space medication.
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Specification
|
Test Items |
Standard |
|
Appearance |
White powder |
|
Hyaluronic Acid |
≥95% |
|
Molecular weight |
800Kda-2000Kda |
|
PH |
6.5-8.0 |
|
Solution transmittance |
≥99.0% |
|
Loss on drying |
<10% |
|
Protein |
≤0.05% |
|
Dynamie viscosity |
Measuned value |
|
Heavy metal |
<20ppm |
|
Bacterial counts |
<100cfu/g |
|
Mold and Yeast |
<10cfu/g |
|
Staphylococcus aureus |
Can not be checkout |
|
Chlorop seu domonas |
Can not be checkout |
|
Shelf Life |
Two Years |
|
Conclusion |
The results meet the USP standard |
Cosmetic Grade Hyaluronic Acid Powder
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