What are the common pests and diseases of Sageretia thea? Summary of the latest control measures
Sageretia thea (Chinese sweet plum), as one of the “Seven Sages” of bonsai and an important material for making bonsai, is deeply loved by bonsai enthusiasts. But if it is infected with 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? Qin Nong Network here introduces several common pests and diseases of Sageretia thea and the corresponding control methods.
1. Rust disease of Sageretia thea
The pathogen of rust disease of Sageretia thea is a fungus caused by Pucciniastrum, which produces aeciospores, making the leaves turn yellow, or the spots on the front of the leaves are initially orange-yellow, and the tissue of the spots slowly becomes swollen and thickened, while the back of the leaf bulges, affecting the appearance. As time goes on, the spots will expand, and can expand to round, turning black, finally causing the leaves to wither and fall off.
Control methods:
Rust spot disease of Sageretia thea can be treated by pruning: before the spring rain, completely prune off the branches and buds carrying the fungus on the Sageretia thea tree. In addition, before the spring rain, spray lime sulfur mixture or sodium pentachlorophenate 350 times solution plus 1.01 kg to reduce the disease.
2. Longhorn beetle pest
When longhorn beetle pest occurs on Sageretia thea, the female longhorn beetle will bite through the bark and then lay eggs on the branches. The newly hatched larvae will bore and feed under the bark, and as they grow they gradually bore into the trunk and roots, then gradually hollow out the branches of Sageretia thea, causing them to die.
Control methods:
A suitably sized iron wire can be directly inserted into the insect hole to pierce the larvae to death.
3. Red spider mite pest
Red spider mite disease appears as red-brown oval shapes. Red spider mites will spin webs and lay eggs on the plant leaves, using their mouthparts to pierce the branches and leaves and suck the sap, causing the chlorophyll of the leaves to be destroyed, making the leaf color gradually turn yellow, and gray-yellow spots also appear on the leaf surface, until the leaves dry up and fall off.
Control methods:
Dichlorvos or dimethoate 1000 times solution to 1500 times solution can be sprayed directly.
The above are three common pests and diseases of Sageretia thea and the measures to control these three pests and diseases. It is hoped that this can provide some help to every bonsai enthusiast. The branch cortex of Sageretia thea itself is relatively thin, and its nutrient transport method is also different, so attention must be paid to maintenance measures during cultivation.