Main Diseases and Pest Control Methods and Technical Measures for Grapes
An article about the main diseases and pest control methods and technical measures for grape flowers, let's take a look together!
Main Diseases and Pest Control Methods and Technical Measures for Grapes
Common diseases in grapes are (T-J) disease, white rot, and downy mildew. Thoroughly remove diseased branches, vines, clusters, and leaves, and bury or burn them to reduce the source of fungi. Timely pruning, shaping, drainage, and weeding, applying more phosphorus and potassium fertilizers, and strictly avoiding the application of nitrogen fertilizers to overgrown plants before flowering. Begin spraying pesticides at the first sign of disease, and if there is damage from mites, you can use Abamectin emulsion or Tetramethrin suspension.
Common Diseases in Grape Cultivation
1. Grape (T-J) disease: It usually starts in June during the summer and peaks in July to August, with the disease worsening as the fruit ripens. In August, during the period of heavy fruit maturation, the disease peaks especially during hot and rainy thunderstorms.
2. Grape white rot: It often occurs in hot and rainy seasons. In the north, it can occur from June to harvest time, affecting fruit growth. After heavy rain, the disease peaks, especially if there is poor drainage, poor ventilation, excessive weeds, or excessive application of nitrogen fertilizers.
3. Grape downy mildew: This disease is prone to occur in seasons with low temperatures and heavy rainfall. Poor ventilation in the orchard, waterlogging in the field, and excessive application of nitrogen fertilizers can promote the disease. In the north, it usually starts in June, with August to September being the peak period. In areas south of the Yangtze River, it mainly occurs during the plum rain season and in mid-to-late August.
Main Pests in Grape Cultivation
There are many pests on grapes, with two types of damage: piercing-sucking and chewing. In the past, chewing pests were more severe, but currently, piercing-sucking pests are showing a trend of severe and frequent occurrences.
Grape Disease and Pest Control
1. Disease control: Thoroughly remove diseased branches, vines, clusters, and leaves, and bury or burn them to reduce the source of fungi. Timely pruning, shaping, drainage, and weeding, applying more phosphorus and potassium fertilizers, and strictly avoiding the application of nitrogen fertilizers to overgrown plants before flowering. Begin spraying pesticides at the first sign of disease, with Bordeaux mixture being the most effective.
2. Pest control: Before grapes germinate, using a 3 to 5-degree stone sulfur mixture can kill mites lurking in the buds. In case of mite damage, you can use Abamectin emulsion or Tetramethrin suspension. If mite infestation is very severe, you can spray with Daminozide emulsion, Pyridaben wettable powder, or Thiacloprid emulsion.
That's all for the main diseases and pest control methods and technical measures for grapes, for your comprehensive understanding and reference!