Techniques and Methods for the Control of Pests and Diseases in crabapple Trees
A brief knowledge about the techniques and methods for controlling pests and diseases in crabapple trees. The following article provides a detailed explanation by the editor.
Techniques and Methods for the Control of Pests and Diseases in crabapple Trees
Many pests and diseases appear in the cultivation of crabapple trees. It is necessary to cut off the tender shoots infested with pests to reduce the pathogen. Pesticides such as Dinotefuran WG, Imidacloprid, pymetrozine WP, and Nitenpyram AS can be used for control. Although the netbug is highly harmful, its life is relatively fragile, and general insecticides can be used without the need for special pesticides. If not treated promptly with pesticides and pruning, the plant may die.
Common Diseases in crabapple Tree Cultivation
Hai棠 brown spot disease mainly appears in rainy seasons and is more common in southern regions. It is one of the most common diseases, leading to complete defoliation. This disease can harm the entire growth period of Malus spectabilis.
Hai棠 rust disease usually appears in April, with orange spots in the early stage, which gradually expand, the diseased tissue thickens, and then the back of the leaves gradually bulges. From May to June, yellowish-white pustules appear, followed by the disease turning brown, and then the leaves wither.
Main Pests in crabapple Tree Cultivation
1. Aphids: Aphids often appear on the back of the leaves of crabapple trees, harming tender shoots and leaves, leading to stopped growth of new shoots, leaf shrinkage, and can also cause sooty mold and viral diseases. They are the main pests of crabapple during spring maintenance, usually appearing in early April and increasing in number from mid-to-late August until defoliation ends.
2. Thrips: Thrips harm the growth of tender buds, causing them to curl and not stretch out. Later, the tender shoots and leaves turn yellowish-brown and gradually scorch. Thrips are very small and difficult to observe with the naked eye, and the affected area is relatively hidden, requiring careful observation. The damage is severe during the high temperatures of July and August.
3. Netbug: Netbugs are mainly distributed on the back of leaves, absorbing the sap from the leaf veins, causing pale spots on the front of the leaves, which then connect to form patches, leading to leaf drop. In severe cases, all leaves may fall off. This pest can appear throughout the entire growth period, with a higher number in July, making it the main pest in summer and autumn.
Control of Pests and Diseases in crabapple Trees
Timely cut off the tender shoots infested with pests to reduce the pathogen. Pesticides such as Dinotefuran WG, Imidacloprid, pymetrozine WP, and Nitenpyram AS can be used for control. Although the netbug is highly harmful, its life is relatively fragile, and general insecticides can be used without the need for special pesticides.
The above is the specific content of the techniques and methods for controlling pests and diseases in crabapple trees for reference and operation.