The Latest Control Methods for Common Pests and Diseases of Cherokee Rose (Rosa laevigata)
Cherokee rose (Rosa laevigata) is a common wild plant. Due to the development of its medicinal properties, market demand for it has risen sharply, and many people have begun growing it at home. As a wild plant, it has strong vitality and rarely suffers from pests and diseases, but when cultivated artificially it is often harmed by pests and diseases that damage its growth and yield. Below, let's take a look with the editor at an introduction to the control methods for common pests and diseases of Cherokee rose.
1. Powdery mildew
Petioles, leaves, tender shoots and flower buds can all be affected. When mature leaves are affected, irregular white powdery spots appear on the leaves; the diseased leaves gradually turn brown starting at night, eventually causing the leaves to dry up and fall off. When tender leaves are affected, chlorotic spots appear and gradually spread, producing white powdery patches that later cover the entire leaf.
Control methods: Choose varieties with strong disease resistance, pay attention to pruning in winter, cut off diseased and pest-infested branches, strengthen field management, and increase the application of phosphorus and potassium fertilizers to improve the plant's disease resistance. When the disease occurs, spray carbendazim; in early spring before budding, spray lime sulfur for control.
2. Black spot
This disease mainly harms leaves, petioles and tender shoots. When leaves are affected, small purplish-brown spots appear and gradually expand into round or irregular black lesions, causing the leaves to wither.
Control methods: Pay attention to field humidity, drain water after the rainy season, prune dense branches to increase air circulation, and when the disease occurs, spray carbendazim, thiophanate-methyl, Tachigaren and other agents for control.
3. Anthracnose
It mainly harms petioles or tender shoots. When leaves are affected, lesions appear at the leaf margins and gradually spread toward the center; in the later stage, small black granules also appear on the lesions. Its pathogen overwinters on fallen leaves and germinates in warm, humid environments. Plants with poor air circulation are prone to the disease.
Control methods: Thoroughly clean the orchard in autumn, collect fallen leaves and residual branches and burn them in a centralized manner, prune appropriately to maintain good ventilation and light transmission, and spray thiodiazole-copper or chlorothalonil for prevention.
4. Scarab beetles
⟦NL>They mainly harm the roots, leaves, flower buds and other parts of the plant. During an outbreak, they severely affect the number of flowers the plant produces and reduce the seed-setting rate, thereby affecting yield.
Control methods: Physical control methods such as light trapping and manual capture can be used. When the pest infestation is severe, spraying deltamethrin or phoxim branch works well.
The above is an introduction to the control methods for common pests and diseases of Cherokee rose. We hope it can help you. If you want to learn more related knowledge, please stay tuned to us.