Pineapple heart rot is common in pineapple gardens soon after planting. Once this disease occurs, it spreads rapidly and causes great losses. The following describes the occurrence of pineapple heart rot and control methods: First, the symptoms The disease is mainly responsible for seedlings, but it can also damage adult plants. The initial leaves of the damaged plants are still green, only the leaves are dark and dull, and the heart is yellowish-white and easy to pull up. It is generally difficult to detect. Then, the diseased leaves gradually reverted to yellowing or yellowing, and the tips of the leaves turned brown and dry. The base of the leaves developed brownish water-stained rotting surfaces. The rotting tissue was softened into cheese-like, and the junction between diseased and healthy parts was dark brown. As a result of the invasion of the secondary bacteria, the rotted surface smells and it dies through the entire plant. Second, the pathogen About the pathogen of this disease, it is generally considered that there are three kinds, including two kinds of pathogenic fungi, namely Phytophthora spp. and Pythium spp., and one kind of pathogenic bacteria, that is, Eubacterium spp. Third, the infection cycle Two pathogenic fungi may overwinter in the soil, and the pathogenic bacteria may be transmitted from other places by the colonized insects. The pathogenic bacteria invade from the young part of the plant's rhizome at the junction of the roots and necks, resulting in the onset of disease. The pathogens produced in the diseased part are spread by rainwater splashing, and repeated infections spread the disease. Fourth, the occurrence of epidemic conditions 1. During the high temperature and rainy season, especially after the autumn planting, heavy rain often occurs. 2. The soil is heavy or poorly drained, and gardens that are prone to waterlogging tend to be heavier. V. Prevention methods 1. The disease is particularly severe in rainy seasons, especially after a short time after planting. Therefore, seedlings must be carefully selected before planting, and after a certain period of dryness, they are then planted. Pay special attention to drainage and avoid planting in low-lying and humid areas. 2. The seedlings should be treated before planting in the wards. Firstly, remove a few leaves from the base of the seedlings, then dip the seedlings with 25% carbendazim wettable powder 800 to 1000 times for 10 minutes to 15 minutes, and then dry them by inverting. Replanting. 3. Avoid injury to the base of the blade, and be careful when weeding and weeding. 4. Rational fertilization, do not apply or excessive nitrogen fertilizer. 5. At the onset of illness, spray 50% carbendazim WP 1000-1500 times or try 70% thiophene 1000-1500 times or 50% benomyl 1500-fold spray (The amount of spray per acre is about 125 kg) to prevent the spread of the disease. The diseased seedlings were removed and burned in a timely manner. The soil in the diseased hole should be replaced with new mud, and then disinfected with lime and then replanted with good seedlings.
Frozen fish portion is the part of all
kinds of fishes, like fillet, roe, milt and so on. This category contains the
following products: Frozen Mackerel Fillet Piece, Mackerel Butterfly Fillet
Piece, Frozen Spanish Mackerel Fillet, Frozen Mahi Mahi Fillet, Frozen Mullet
Gutted, Frozen Mullet Roe, Frozen Mullet Milt, Frozen Mullet Gizzard, Frozen
Cooked Frigate Tuna Meat and Frozen Cooked Tuna Meat.
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modern enterprise, so our company have established cooperative relationship
with some famous universities like Zhejiang University of Technology and
Shanghai Ocean University and so on.
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delicious, natural and safer marine health food.
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