The symptoms are also known as seedling blight. The stems and leaves of the seedlings are mainly damaged. The stalk was infected with water and immersed in nearly round or amorphous plaques. It quickly turned gray-brown to black and rotted, causing the plants to collapse from the diseased part. When the soil or the humidity between the plants is high, white to grayish filamentous hyphae grow on the diseased area and the surrounding soil. The leaf was infected with dark green near-circular or amorphous water-soaked spots at the beginning of disease, and was gray or gray-brown under dry conditions. The diseased part was like thin paper, and it was easily perforated and broken. When the humidity is high, the disease minister produces a white cotton floe, which is the mycelia of the pathogen. The root of Pythium debari seedling rot is immersed in wet rot.
The pathogen Pythium aphanidermatum (Eds.) Fitzp. said that Pythium aphanidermatum and Pythium monospermum Pringsh said that Pythium and Pythium debaryanum Hesse called Pythium debari, which belonged to the flagellin subphylum fungi. The frequency of the former is high in areas with high temperatures. P. aphanidermatum morphological characteristics see rapeseed damping-off; P. monospermum mycelia colorless branching, diameter 2.6-5.2μm, colonies on CMA medium radial or fuzzy chrysanthemum petals, daisy-like petals on PDA medium The difference between sporangia and mycelium was not obvious, and the sporangia and mycelia were not branched, and they were 180 μm in length and 2-5 μm in width. The vesicles contained 2-20 or more zoospore. Zoospore biflagellate, reniform, size 9.8-12.36.9-8.6 (μm). The oviculum is spherical to oblate, smooth, sometimes with 1 mastoid, terminal or meristem, diameter 10.3-25.8 μm. Male sticks. Oval spores spherical, smooth full. P. debaryanum sporangia spherical to ovate. The oospores are spherical, smooth surface, and each oospore produces an oospore.
Transmission Pathways and Pathogenic Conditions Germs and mycelia are overwintering in the soil and germinate when conditions are appropriate, resulting in sporangia and zoospores or the direct emergence of germ tubes to invade the host. After the onset of the disease, the pathogens are mainly damaged by the exposure of healthy strains and the expansion of hyphae. The germs continue to produce sporangia or zoospores in the diseased part. They spread through rainwater and irrigation water, and the disease continues to expand. Finally, oospores are formed in the diseased part. Wintering. The disease is prone to onset in warm and humid years and seasons, especially after heavy rains; the production fields are low-lying, waterlogged, moisture trapped, over-populated, and heavily applied nitrogenous fertilizers. Transplanting seedlings is more prone to disease than direct seeding. In humid nights, less than 1 cm of small lesions can cause most leaves to soften and rot in one night, and some are covered with white hyphae.
Control methods (1) selection of high temperature and rainy varieties. (2) Apply compost or fermented organic fertilizers that are fermented by enzymes to prevent the transmission of pathogens by pathogens. (3) The selected seeds should be fully matured so as to make them strong. (4) Implement split seedlings and late-day seedlings to ensure that strong seedlings will be retained. (5) To discover and remove the diseased plants in time, and concentrate on deep-buried or burned fields. The diseased holes should be immediately sterilized with quicklime. (6) Timely and appropriate watering, watering schedules should be carried out in the morning to prevent flooding, and timely drainage after rain to reduce soil and plant humidity. (7) Spray 70% Ethylphosphine Manganese Zinc Wettable Powder 500 times or 60% Ethyl Aluminum Phosphate Wettable Powder 500 times, 64% Antitoxicant Wettable Powder 500 times, 18% Methionine Manganate in the early onset. Zinc wettable powder 600 times liquid, 58% metalaxyl manganese zinc wettable powder 500 times liquid, 72% frost urea manganese zinc and 72% DuPont dew wettable powder 800 times liquid, every 7-10 days, continuous Prevention 2-3 times. (8) When the above-mentioned fungicides are resistant, 69% ank manganese zinc wettable powder 1000 times liquid or 95% Greenhenge No. 1 fine quality 4500 times liquid can be used.
Sunson Leather Enzyme is developed for leather industry. Soaking enzyme mainly used in soaking, can also be used in combination with other chemical agents. It can be widely used for soaking process in all kinds of dry hide, wet salted hide, fresh hide. Liming enzyme mainly used in liming, can also be used in combination with other chemical agents. Acid bating enzyme suited for all tanning operations in the acid side, such as, Pickling, Acid bating, Wet-Blue reconditioning and so on. Alkaline bating enzyme suited for all skin softening. Remove the non-fibrous proteins and dissoluble proteins.
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Benefits:
The effectiveness is tender, balanced. Effectively improve the pliability and fullness of the leathers, increase the yield of leather output. When used in Wet-Blue reconditioning, it promotes the absorption of tanning agent and improve the dyeing uniformity, it has very good permeability, evenly soften effect can be obtained. Its use will not lead to loose grain on leather.
This product should be stored in a cool and dry place in sealed container, avoiding insolation, high temperature and damp. The product has been formulated for optimal stability. Extended storage or adverse conditions such as higher temperature or higher humidity may lead to a higher dosage requirement.
Enzyme preparations are proteins, which may induce sensitization and cause allergic type reactions in sensitized individuals. Prolonged contact may cause minor irritation for skin, eyes or nasal mucosa, so any direct contiguity with human body should be avoided. If irritation or allergic response for skin or eyes develops, consult a doctor.
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