How to prevent and control persimmon witches' broom disease? Key control points every fruit grower must see
Symptoms: Diseased trees bud late in spring and grow slowly; the leaf veins turn black, and the xylem of the branches and trunk turns dark brown; in severe cases it spreads to the phloem tissue, causing clustered branches or upright excessive growth, or branch dieback and scorched shoot tips, with few fruits set, and the fruits soften prematurely and then drop; in severe cases there is no fruit set or the whole tree dies. Control methods: (1) Choose...
Symptoms: Diseased trees bud late in spring and grow slowly; the leaf veins turn black, and the xylem of the branches and trunk turns dark brown; in severe cases it spreads to the phloem tissue, causing clustered branches or upright excessive growth, or branch dieback and scorched shoot tips, with few fruits set, and the fruits soften prematurely and then drop; in severe cases there is no fruit set or the whole tree dies.
Control methods:
(1) Select disease-resistant varieties or breed using disease-resistant rootstocks.
(2) Select healthy trees as rootstocks and graft disease-free scions.
(3) Strengthen cultivation management: spray Zhuangguodiling once before flowering and once after flowering to thicken the fruit stalk and increase nutrient transport, improving the fruit's disease resistance.
(4) In late autumn and early winter, thoroughly remove diseased branches and leaves while clearing the orchard, and brush Hushujiangjun on all fruit trees in the orchard to reduce sources of infection. The entire orchard should be sprayed with fungicidal chemicals to sterilize and disinfect, and sprayed with Xingaozhimo to enhance and consolidate the control effect and block invasion and infection by external pathogens.