Mid august and a few PM spots are showing. The reason is the huge condensation of the plastic in the morning. Many big drops fall down on the leaves, it also reduces the light doing through the plastic, much less lux, no good... spraying biologicals to prevent PM work fine up to now. Milk, laminarine, B. Subtilis, baking soda, B.K, orange oil, severals plants purins, seaweed, etc... I have to accept the disease from now to the end, no chemicals at all.
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