Hello. The symptoms are specific to a downy mildew attack. In this case, it is important to remove the affected plants and carry out 2 treatments, at intervals of 7-10 days, with a fungicide such as , in a dose of 14 ml / 10 l water. To increase the effectiveness of the fungicide, it is recommended to add in the spray solution an adjuvant such as , in a dose of 2 ml / 10 l. It is important to respect the preharvest interval written on the product label. To stimulate healthy growth, it is recommended to apply organic fertilizer, specially formulated for the nutritional requirements of vegetables: . Because you have applied a fertilizer before, it is advisable to check the label of the product used to see the period of action of the fertilizer. After this period, you can use organic vegetable fertilizer gemusezauber. For more information about the diseases and pests that can affect onions, you can read the following article: (Onion, treatments against pests and diseases). Regarding the pest, the attached image is not clear enough for an exact identification, but it can be wireworm: Wireworms (Agriotes sp.) – pest management.
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This reply was modified 2 years, 2 months ago by Armuro.
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This reply was modified 2 years, 2 months ago by Armuro.
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This reply was modified 2 years ago by Armuro.
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This reply was modified 2 years ago by Armuro.
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This reply was modified 2 years ago by Armuro.
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This reply was modified 2 years ago by Armuro.
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This reply was modified 2 years ago by Armuro.
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This reply was modified 2 years ago by Armuro.