Mushroom verticillium disease

Verticillium trichoderma, also known as dry bubble disease, dry rot, black spot, etc., belongs to the fungal phylum, half-knowledge subphylum, Trichoderma. Trichoderma, Cladosporaceae. It not only harms mushrooms and mushrooms, but also infects Tremella fuciformis.

[1] Disease: generally does not infect the mycelium, only infects the fruiting body, but can spread along the mushroom fungal cord. Dry rot spread rapidly and had strong infectivity to fruiting bodies. Before primordium differentiation, gray-white tissue blocks with dry texture were formed, which could not differentiate into stalks and caps, and there was no juice exudation and no stench in the later stage. After the young mushroom was infected, the hyphae could invade the pith of the fruiting body, making the base of the stalk abnormally dilated and brown, and the outer layer dry and cracked, while the cap was slow and skewed, and the fruiting body was malformed and ossified. If it is infected in the middle and later stage of the fruiting body, there are many irregular, needle-sized brown spots on the cap, and gradually expand to produce depressions, the sunken parts are gray-white, full of conidia of Cladosporium verticillium, the stalks become thicker and brown, the outer tissue is peeled off, the diseased mushrooms are askew and deformed, do not rot, have no odor, and finally dry and die, cut open the diseased mushrooms, and the interior of the tissue is yellowish brown, dry and loose. The course of disease of mushroom is about 14 days from infection to brown spot.

The pathogen can also cause Tremella rigidity, causing the ear base to shrink not long after the formation of the ear base, showing dark brown, small ear piece shrinkage can not grow up, the shape is cauliflower-shaped; some ear base part is infected, so that part of the ear piece can continue to open. Under wet conditions, a layer of white mildew grows quickly on the surface of the stiff ear, which is the spore peduncle and conidia of the pathogen.