The disease occurs from late October to April of the next year.
Yellow spots will appear on the back of the leaves of Albizzia julibrissin after the disease. The spots will produce white blisters.
In the early stage, the rust brown powder is scattered in the blister, that is, the summer spore pile of the pathogen, and in the later stage, the dark brown powder is scattered in the blister, that is, the winter spore of the pathogen. It is Acacia ball rust, basidiomycetes, Cercospora and rust.
Spray 0.3 stone sulfur mixture, or 75% chlorothalonil wettable powder 400 times, once every 10-15 days, twice or three times in a row.
Fusarium Wilt of Albizzia julibrissin is a kind of systemic infectious disease, which has a high probability of occurrence. Both seedlings and trees will be endangered, and it is the biggest threat to the growth of Albizzia julibrissin.
In high humidity and rainy seasons, the disease is serious; the soil is sticky, low-lying, poor drainage, and waterlogged land is prone to disease; the wounds caused in the management process such as transplanting or pruning will increase the chance of Fusarium infection.
When the seedlings are infected with the disease, the leaves will gradually turn yellow, the roots will become soft, and lodging will occur, and finally the whole plant will die.
If the adult plant is infected with the disease, first a few branches show symptoms, the leaves shrink and droop, light green or light yellow, dry and fall off later, then some branches start to dry up, gradually expand to the whole plant, until death.
Cut off the main section, a whole circle of discolored rings can be seen, and the root section is brown or dark brown.
When the seedlings grow 2-3 true leaves, spray 2000 times of Methamidophos once to prevent ants and other pests from harming the seedlings. Then spray foliar fertilizer on the leaves regularly and quantitatively to improve the disease resistance of the seedlings.
The newly diseased plants can be controlled by changing the soil and combining the chemical treatment. They can be sprayed or applied with 70% methyltobujin wettable powder and 60% doxorubicin wettable powder at 100 times; or they can be irrigated with 14.5% doxorubicin water-soluble powder, 40% pentachloronitrobenzene powder at 300 times, as well as the conventional concentrations of anti kuning, methyltobuzin, Carbendazin and other pesticides every 8 days or so. Irrigation once, 3-4 times in a row.
Using 300 times of 70% kitobuzin wettable powder to infuse into the plant can improve the curative effect.
