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0 Wish green leavesGrapevine, fan-shaped leavesI sprayed a week ago with Universalis and Vertimec.Read Specialist's adviceGreen leaves
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Hello. What pest got into the grapevine leaves? I have attached backlit pictures for a better view
Hello! The attack on the leaves of the grapevine is similar to that caused by a leaf-mining insect such as Holocacista rivillei or the grapevine leaf miner (Phyllocnistis vitegenella). They cause minor damage, but if the attack is severe, the photosynthetic capacity of the leaves is affected. It is recommended to remove the affected leaves and destroy them by burning, followed by a treatment with an insecticide such as Vertimec 1.8 EC, 10 ml, in a dose of 10 ml/10 L water, applied by foliar spraying. To increase the effectiveness of the insecticide, it is recommended to add to the solution an adjuvant such as Break Thru S 240, 2 ml, at a dose of 2 ml/10 L. Also, to maintain a good phytosanitary condition of the plant, it is important to carry out treatments during the dormancy period (after leaf fall) with copper fungicides and horticultural oil (Winter treatments with oils and copper-based products). Additionally, during this period, in order to increase the resistance to drought and frost, as well as to improve the water balance of the grapevine, it is recommended to use a fertilizer with a high potassium content: Fertilizer 0-0-40 Azet HerbstKali, 2 kg. It is administered by spreading around the plants, followed by gentle incorporation and watering, according to the recommendations on the label.
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