Control methods of diseases and insect pests of Rosa roxburghii

The health care effect of Rosa roxburghii has attracted great attention at home and abroad, its planting requirements are not strict, it can adapt to various regions, and the planting benefit is good. However, when planting, Rosa roxburghii is very vulnerable to diseases and insect pests, thus affecting the yield, quality and the interests of growers, so what are the common diseases and insect pests? How to prevent and cure it? Let's take a look.

1. Powdery mildew

Powdery mildew mainly harms the young parts of Rosa roxburghii Tratt, such as tender leaves and tender leaves, but also causes some harm to flowers and fruits. Its spores are mainly spread by wind, and the spreading time is mostly in the daytime. Irregular disease spots appeared in the young and tender parts at the onset of the disease, and white powder appeared in the disease spots in the later stage, which led to plant dwarfism and affected the yield.

Control methods: comprehensive prevention and control of powdery mildew, first of all, choose an environment with sufficient light to plant, strengthen fertilizer and water management, improve plant disease resistance, and increase plant permeability through reasonable pruning. When the disease occurs, it can be sprayed with fenrust, antimycin and other agents, and the effect is better.

2. Brown spot

Brown spot mainly harms the leaves of the plant, and the damage to the old leaves is serious, and the onset time is generally from May to October, of which July to August is the most serious period of the disease. When the disease occurs, the leaves appear brown disease spot, when the disease spot is dry and perforated, when it is wet, it will lead to rot, and when it is serious, it will cause a large number of leaves to die and fall off, affecting the normal photosynthesis of the plant.

Control methods: strengthen fertilizer and water management, enhance plant disease resistance, can be used mancozeb or carbendazim solution spray control, once every half a month, continuous spraying 3-4 times, the control effect can reach more than 85%.

3. Bituminous coal disease

Bituminous coal disease does not parasitize Rosa roxburghii directly, it mainly parasites on the excreta of aphids and whitefly, mainly harms the leaves and branches of the plant. Black-brown mildew spots appear during the onset of the disease, which gradually spread and form large patches of black bituminous coal, which is a common disease of Rosa roxburghii.

Control methods: from its pathogen, the key to control the disease is aphids and whitefly, omethoate can be used to control aphids and whitefly, the effect is better.

4. Pear heart borer

The small heart borer of Rosa roxburghii is the main borer of Rosa roxburghii Tratt, which will eat in the fruit, harm the young parts, cause flower and fruit drop in the early stage, and appear black feces in the middle fruit. It seriously affects the yield and quality of Rosa roxburghii Tratt.

Control methods: after harvest, the branches of diseases and insect pests can be trimmed, the source of insects can be reduced, the management between the garden can be strengthened, and the poisonous soil can also be used to kill larvae.

The above are the pest control methods of Rosa roxburghii. I hope I can help you. If you want to know more about it, please pay attention to us.