Seeds Pests and diseases

Wrong mildew

21.01.2021

General
 
Better downy mildew than powdery mildew? No, unfortunately downy mildew (belongs to the order Peronosporales of the egg fungus) is also extremely unpleasant for cannabis growers and all other types of gardeners. Downy mildew mainly spreads in warm, humid conditions - indoors, outdoors and in the greenhouse.
 
damage
 
Downy mildew is even less popular with growers than powdery mildew, because wherever it only attacks from the outside, the downy mildew spores penetrate through stomata into the plant tissue, where they extract its nutrients from the hemp. Affected leaves turn yellow and fall off.
 
identification
 
As the name suggests, downy mildew is often mistaken for powdery mildew, as whitish spots appear on the surfaces of the hemp leaves. However, these arise in the sheet itself and do not rest on it. In contrast to powdery mildew, downy mildew also forms a grayish-bluish fungal lawn on the underside of the cannabis leaves.
 
prophylaxis
 
The best protection for hemp is to keep a close eye on ventilation and moisture. If you don't grow a few hectares of maize, but just a few cannabis plants, you probably want to do without prophylactic chemical clubs. If not, outdoor growers can contact the crop protection warning service for information on when and where downy mildew prevention is advised.
 
Elimination
 
The approach is identical to powdery mildew: first of all, infested leaves, flowers or even entire cannabis plants must be removed. Since it is important to ensure that the mold does not spread too much into the air, the affected parts or plants can be packed in plastic bags before cutting.