MySheen

Prevention and control of diseases and insect pests of tree stump bonsai

Published: 2024-11-23 Author: mysheen
Last Updated: 2024/11/23, There are diseases in the branches, such as phloem, cambium decay, stem rot and ulcers on the branches, surface decay of the branches, dry core decay, spots on the branches, and so on. Bordeaux solution should usually be sprayed, Xu with stone-sulfur mixture, and scraped off the rotten parts. Foliar diseases: foliar diseases usually appear yellow-brown or black spots, leaf curl, wilt, early defoliation and other symptoms, which may be yellowing, leaf spot, soot, powdery mildew and so on. Leaf spot can be removed from diseased leaves and Bordeaux solution can be sprayed; chlorosis can be used with 0.1-0.

There are diseases in the branches, such as phloem, cambium decay, stem rot and ulcers on the branches, surface decay of the branches, dry core decay, spots on the branches, and so on. Bordeaux solution should usually be sprayed, Xu with stone-sulfur mixture, and scraped off the rotten parts.

Foliar diseases: foliar diseases usually appear yellow-brown or black spots, leaf curl, wilt, early defoliation and other symptoms, which may be yellowing, leaf spot, soot, powdery mildew and so on. Leaf spot disease can be removed and Bordeaux solution can be sprayed; chlorosis can be sprayed with 0.1-0.2 ferrous sulfate solution; powdery mildew can be sprayed with Baume 0.3-0.5 degree sulfur mixture.

Root disease: the root of the stump bonsai is aging, which is easy to produce root rot or nodule disease caused by various bacteria and fungi. Attention should be paid to the disinfection of potted soil and the control of watering water.

The control of scale insects: the harm of scale insects is generally various. It is a pest that absorbs tree stump tree sap, and it is easy to cause soot disease, poor growth, yellow branches and leaves, early defoliation and so on. In addition to killing with manual brushes, 40% dimethoate EC 1000-1500 times solution can be used, or 80% dichlorvos 1000-1500 times solution can be used to kill it.

Red spider treatment: red spider is to absorb leaf juice to harm the leaves, after pests, the leaves show gray spots, and cause withered yellow shedding. The control method is to spray with 40% dimethoate emulsion 1500200 times solution or 1000 times solution of 50% parathion wettable powder.

Aphid control: there are many kinds of aphids and the harm is common. The leaves of the injured stumps are generally curled and drooping, and when they are serious, the leaves are black, dry and shedding. Control method: generally spray with 40% dimethoate 2000-300O times aqueous solution, once a week. Or spray it with an aqueous solution of 2.5% 800 to 1200 fish vines.

 
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