Grape Disease and Pest Control Techniques
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Grape Disease and Pest Control Techniques
Common diseases in grape cultivation include downy mildew, (T-J) disease, and the main pests include the spotted linden bug, golden turtle beetle. When pests and diseases occur, it is necessary to trim and destroy the infected branches and leaves in time, strengthen cultivation management, and remove the heart leaves in time. Pay attention to ventilation and lighting, reasonable watering, and prevent excessive humidity. When the disease occurs, spray chemicals for prevention and control. If adult insects are found, they can be captured manually, or they can be captured by shaking trees due to their phototaxis.
What are the Common Diseases in Grape Cultivation
Downy mildew: This disease is also known as Peronospora, mainly affecting leaves, tender branches, and fruits. Initially, irregular water-stained spots appear on the front of the affected leaves, ranging from light green to light yellow. As adjacent lesions merge, large polygonal spots form, and a white downy mold layer appears on the back. In the later stage, the lesions become darker, turning yellowish-brown or brown, and severe cases can cause early defoliation. (T-J) disease: This disease is also called late blight, mainly affecting fruit clusters and green tender tissues. Initially, brown circular spots appear on the surface of the fruit clusters, which are sporangia. When humidity is high, red spore masses burst out from the sporangia, which is a distinct feature of this disease. In severe cases, the lesions can extend to half of the fruit surface, but it is more common for the entire cluster to be covered with brown spots, causing the berries to shrink and dry. Lesions on leaf veins and petioles appear as sunken, elliptical spots about 1 cm long, dark brown. Old leaves in late autumn can also be affected.What are the Main Pests in Grape Cultivation
Spotted linden bug: This pest feeds on the sap of tender leaves and branches, with excrement scattered on branches, leaves, and fruits, causing sooty mold disease. Tender leaves often develop holes, and severely affected leaves often rupture. Golden turtle beetle: This pest mainly affects grapes with adults, with a damage period of about 80 days. From mid-May, adults begin to feed on grape leaves and tender branches, leaving leaves incomplete and sometimes biting off tender branches and fruit stems.Grape Disease and Pest Control Techniques and Management Methods
Downy mildew control: Control methods include promptly destroying infected branches and leaves after pruning, ensuring good ventilation and lighting, reasonable watering to prevent excessive humidity, and preventing prolonged dew formation on leaves. When the disease occurs, spray 40% phosphonate 300x solution for control. (T-J) disease control: Strengthen cultivation management, remove heart leaves in time, ensure good ventilation and lighting, reasonable watering to reduce humidity, and spray chemicals for prevention. Starting from the young fruit stage, spray once every half month with a choice of 50% validamycin wettable powder 800-1000x solution or 50% chlorothalonil wettable powder 500x solution. Spotted linden bug control: Control methods include spraying chemicals during the larval or adult stage. Options include 80% dichlorvos emulsion 1000x solution, 50% water amitraz 2000x solution, or 2.5% bromide ester emulsion 4000x solution, all of which are effective. Golden turtle beetle control: Control methods include manual capture of adults or using their phototaxis to shake trees for capture; use 90% trichlorfon 800x solution to control adults.The detailed content shared above about grape disease and pest control techniques is hoped to be helpful to you!