Brief introduction ?x fruit small hole shell rot, also known as white rot, is one of the important diseases during storage and transportation of xx fruit, both at home and abroad. Guangdong reported that the disease rate of the disease reached 10% during the storage period. 40%.
distributed
Symptoms There are three common symptoms of the disease: (1) pedicure. At the beginning of the disease, the fruit pedicle was dark yellow and water stained. The bacteria spread rapidly at room temperature, and when the whole fruit is rotted half, a large number of small black particles appear in the diseased fruit. The diseased department turned into a light brown to yellowish-brown, the skin was concave, the fruit was not liquefied, and a large number of dark gray-green mycelium appeared on the small black particles after rot. (2) Skin type. The bacteria invaded from the lenticels or wounds. The lesions were light brown, concave, and rounded at the beginning, and gradually expanded afterwards. Small dark particles appeared in the center. The gray-green mycelium grows on it. (3) end rot type. The appearance of water-stained, dark-black lesions at the end of the fruit, which spreads quickly, often occurs at the end of storage.
Pathogens are Dothiorella dominicana Pet.et Cif. . The pathogen is a sub-genus of the fungus, a small hole shell. Conidiophores are spherical, with orifices, most of which are 4-6, set in sub-sets, rarely solitary, diameter 100-125 microns. Conidia unit, colorless, spindle to ellipse, size 14-23 microns 4-6 microns.
The onset of the disease is most suitable for the temperature of the disease is 25-32 °C. As a result, more serious diseases occur in the years when the typhoon storms occur. Fruits with short fruit stalks and timely post-harvest treatment at the time of harvesting have a lighter incidence. Fruits that do not leave fruit stalks and are not treated in time after harvest are heavier.
Dyeing cycle
Control methods
(1) As soon as possible after picking, use 52 °C, 1000 mg / liter Benzol solution for 5 minutes.
(2) The remaining control measures may refer to relevant parts of fruit coking disease.
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