Rose Pests and Diseases Control in Summer
This article guide: Green plant and flower planting content for the prevention and control of rose pests and diseases in summer, let's follow the editor to see the specific details!
Every year when summer arrives, issues with roses begin to increase. Recently, many flower enthusiasts have asked why there are so many holes in the leaves of their roses at home? The flowers also look dirty and incomplete. I believe many flower enthusiasts have encountered such problems, and it is actually caused by pests.
Rose Pests and Diseases Control in Summer
Roses are very susceptible to pests and diseases, perhaps because roses bloom so beautifully that even insects particularly enjoy them. In May and June, roses first develop red spiders. This year, the weather is abnormal, with heavy rain in the south and extreme heat in the north, making red spider infestations particularly severe.
Red spiders cause significant damage and are relatively difficult to treat. In dry areas, it is recommended to not only persist in applying miticides but also to frequently rinse the leaves of roses to increase humidity. When using miticides, ensure thorough spraying, applying the pesticide to all areas without any死角 to guarantee the effectiveness of miticide treatment.
In areas with more rainfall, roses can be placed outdoors to be rained on. After the rainy season ends, the red spiders will also be eliminated. In my region of Zhejiang, we have a plum rain season every year, so after roses are infected with red spiders, I rarely use pesticides. After the rainy season, the red spiders are gone.
However, during the rainy season, although the red spiders are gone, other insects clearly increase, such as caterpillars that eat leaves and thrips that eat tender buds.
Caterpillars, which are mostly the larvae of moths and butterflies, mainly feed on the leaves of roses, causing leaf damage and holes. Some insects specifically feed on rose buds, such as cotton bollworms. These caterpillars are relatively easy to manage; applying lambda-cyhalothrin every半个月 can minimize damage. If there are fewer potted roses, manual capture can even solve the problem.
Compared to caterpillars, thrips are even more讨厌 and difficult to deal with. Thrips are active at night and are very small, almost invisible. However, they severely damage the tender branches and buds of roses, causing growth stagnation and blackening of new buds.
Thrips not only harm roses but also many other plants. Thrips not only damage tender branches and buds but also harm rose buds, even boring into them to feed, causing bud growth deformities, incomplete and blackened flower buds, severely affecting their ornamental value.
To deal with thrips, regularly spray insecticides such as acetamiprid and dinotefuran. Pay attention to the timing of spraying; it should be done in the evening because thrips are not active during the day. Spraying later will be more effective against thrips. In addition to spraying, hanging yellow and blue boards to catch insects can also be quite effective.
In addition to having many insects, black spot disease is also very common in summer, especially in rainy areas. For example, in our Zhejiang region, it is almost impossible to find an opportunity to apply pesticides during the rainy season. After a rainy season, black spot disease can become very severe.
For large藤本月季, their resistance to pests and diseases is relatively better, but for many potted shrub roses, it can be more challenging. It is recommended to spray pesticides regularly for prevention in the summer, and potted roses should be kept away from rain during the rainy season.
Since there are many pests and diseases in summer roses, pesticides for both fungicides and insecticides can be mixed and sprayed together for convenience. However, note that the number of types of drugs mixed at one time should not exceed 4, and they should be prepared and used immediately.
The above (()) provides you with some small experiences in preventing and controlling rose pests and diseases in summer, hoping to bring help to your life!