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What treatment can I apply to potatoes?

Hello. The potatoes look very good, only the leaves have started to turn yellow at the base. When planting I put on complex 20.20.20.then in 30.05 I sprayed preventively with Ridomil, Mavrik, and Asfac. In 06. 06 had already appeared downy mildew, it was rainy and cold weather, I sprayed with Ortiva top + Bordeaux mixture +Cropmax, then after more rain the basal leaves started to yellow and I sprayed with Ridomol+CROPMAX, in 28.06 the small colorado beetles appeared and I sprayed with Mavrik+Borocal+Plkalin. What else can I apply? Because it has not stopped the disease. Maybe it is not downy mildew and it is something else. In the area, there have been long and almost daily rains with low temperatures at night 12 °C.

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Hello. The plants look good overall. Given the treatments mentioned further, it is advisable to remove the affected plants and carry out the specific treatments in vegetation. For more information about the diseases and pests that can affect potatoes, you can read the following article: (Potato, treatments against pests and diseases). At the same time, it is possible that the plants have suffered a slight form of phytotoxicity, determined by the application of mixed products. In the future, when you want to combine certain plant protection products, it is advisable to read their label carefully. Usually, the incompatible substances in the mixture are mentioned on the package (name of the active substance or its pH). In order to establish compatibility, you must keep in mind that before using a mixture of products (fungicides, insecticides, liquid fertilizers) to perform a micro-test in a small volume of water. Do not use the mixture if the products react with each other if a precipitate or a persistent foam is formed. In order to avoid any risks of diminishing the efficacy of the products or occurrence of phytotoxicity, it is desirable the individual application of both plant protection products and fertilizers or minimizes the number of components in the mixture. Currently, to stimulate leaf recovery and help plants overcome stress, it is advisable to apply a fertilizer such as Terra-Sorb Foliar, 100 ml, in a dose of 25 ml / 10 l water. 1-2 treatments can be applied, by foliar spraying, at an interval of 10-14 days.

• This reply was modified 2 years, 2 months ago by Armuro.
• This reply was modified 2 years, 2 months ago by Armuro.
• This reply was modified 2 years ago by Armuro.
• This reply was modified 2 years ago by Armuro.
• This reply was modified 2 years ago by Armuro.
• This reply was modified 2 years ago by Armuro.
• This reply was modified 1 year, 2 months ago by Armuro.

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