The Occurrence and Prevention of Pineapple Rot and Fruit Rot
First, the pineapple peduncle disease in the fruit ripening period and storage and transportation, often cause a large number of fruit rot, the incidence rate is generally 10% -20%, up to 30% -40% serious. Fruit damage often starts from the pedicle, and the lesion begins with a needle-like brown dot, which gradually enlarges to a round, dark brown, and gray-brown, water-stained lesion. In the end, most of the fruits turn brown and rot, and the pulp is bitter and bitter, with no food value. The dense white mucilage in the disease department is a conidial spore mass of the pathogen. Fresh Breaded fish fillet Fish Fillet,Fresh Fish Fillet,Breaded Fish Fillet,Fresh Breaded Fish Fillet Zhoushan Junwei Aquatic Products Co., Ltd. , https://www.junweiaquatic-intl.com
Pineapple rot is a fungal disease, the pathogen of which is the coccidiformis, the conidium is a colorless unit cell, followed by a brown twin, the surface has vertical lines, oval to oval, wooden pineapple Pythium rot is a parasitic fungus.
The pathogen is wintering on diseased branches and diseased fruits with mycelia and conidia. In the spring of the following year, when the climatic conditions are appropriate, a large number of conidia are grown as the primary source of infestation, infecting young fruit of pineapple. As the disease resistance of the young fruit is strong, the pathogen is latent in the fruit after invading. When the fruit begins to ripen, symptoms will appear one after another when the disease resistance is low. In addition, pathogenic bacteria invade from the wound. During the fruiting period, the typhoon is attacked or the fruit surface is injured due to insect infestation. This is an important approach for pathogen invasion. The key measure to prevent and treat this disease is to spray protection during the young fruit period, especially after the typhoon has rained. The main agents are: 70% thiophanate-methyl WP 800 times, 40% copper oxychloride suspension 500 times, 75% chlorothalonil wettable powder 800 times and 1% Bordeaux mixture. Secondly, in the production management and harvesting, it is necessary to minimize fruit injuries. When storing and transporting, it is best to use paper for single fruit packaging to avoid touching each other and increase infection.
Second, wood pineapple fruit rot wood pineapple fruit rot is a common disease, occurred in the fruit's maturity and storage period. The diseases that cause rot in the pineapple fruit include, in addition to anthrax, the soft rot of the pineapple, the pink rot of the pineapple, and the acid rot of the wood.
1. The woody pineapple soft rot disease can damage the inflorescences, young fruits and mature fruits, but mature fruits are most susceptible. The diseased area began to be water-stained and quickly expanded to a brownish soft rot. The surface of the diseased area was covered with white coarse hairy sporangia and black small sac-sporangia.
2, pineapple Pink disease often accompanied by pediculosis, Rhizopus, damage, resulting in brown rot later in the fruit. There was a layer of mildew on the surface of the diseased area, pale pink after the initial white.