What are the common pests and diseases of Sageretia thea? Detailed control measures

As one of the "Seven Sages" of bonsai and an important material for making bonsai, Sageretia thea (Chinese sweet plum) is deeply loved by bonsai enthusiasts. However, if it is infected by pests and diseases, its value will be greatly reduced. So which pests and diseases is Sageretia thea prone to? And how should these pests and diseases be controlled? Qinnong Network introduces here several common pests and diseases of Sageretia thea and the corresponding control methods.

I. Rust disease of Sageretia thea

The pathogen of rust disease in Sageretia thea is caused by the fungus Puccinia polyspora, which produces aeciospores, causing the leaves to turn yellow, or the lesions on the upper surface of the leaves are initially orange-yellow, and the lesion tissue gradually becomes swollen and thickened, with the underside of the leaf bulging, affecting its appearance. As time goes on, the lesions will expand, potentially enlarging to a circular shape and turning black, eventually causing the leaves to wither and fall off.

Control methods:

Rust spot disease of Sageretia thea can be treated by pruning: before the spring rains, completely cut off the branches and buds on the Sageretia thea tree that carry the fungus. In addition, before the spring rains, spraying lime sulfur mixture or sodium pentachlorophenate 350-fold solution plus 1.01 kg can reduce the disease.

II. Longhorn beetle pest

When longhorn beetle infestation occurs in Sageretia thea, the female beetle will bite through the bark and then lay eggs on the branches and trunk. The newly hatched larvae will bore and feed under the bark, and as they grow they gradually bore into the trunk and roots, gradually hollowing out the branches of the Sageretia thea until they die.

Control methods:

A suitably sized piece of iron wire can be inserted directly into the insect hole to pierce the larvae to death.

III. Red spider mite pest

Red spider mite disease appears as reddish-brown oval shapes; red spider mites will spin webs and lay eggs on the plant's leaves, using their mouthparts to pierce the branches and leaves and suck out the sap, causing the chlorophyll in the leaves to be destroyed, making the leaf color gradually turn yellow, and grayish-yellow spots also appear on the leaf surface, until the leaves dry up and fall off.

Control methods:

You can directly spray dichlorvos or dimethoate 1000-fold to 1500-fold solution.

The above are three common pests and diseases of Sageretia thea and the measures to control these three pests and diseases. We hope this can provide some help to every bonsai enthusiast. The bark layer of Sageretia thea itself is relatively thin, and its nutrient transport method is also different, so attention must be paid to care measures during cultivation.