Powdery mildew is a common problem in herbaceous plant garden , accord to the Horticultural Development Company . This fungal disease , which take care like a ok , white fuzzy software on the plant , is especially prevalent on salvia , parsley and stack . The mildew may dwell of a number of different types of fungi , which motley depending on the particular herbaceous plant . Although the fungi might be dissimilar , the conditions that have powdery mould in an herb garden are the same .

Identification

Powdery mildew appears as spots of white , powdery or blurry stuff . The color might be creamy white or it might be gray . The " fuzzy " well wipes off when rubbed . It is most commonly see on the tops of the leave of absence of the plant , according to Colorado State University . In time , the spots will merge , and the entire leaf , as well as other parts of the industrial plant , may be covered with the fungus .

Types

There are many fungus that affect herbaceous plant in this way . slew and sage are ordinarily infected by the fungus Erysiphe biocellata . Parsley is the favorite host for Erysiphe heraclei . Oregano is especially susceptible , as it can be infected by any of the Erysiphe mintage of fungi and also Neoerysiphe galeopsidis . Rosemary is also affected by Neoerysiphe galeopsidis . For that grounds , it is not recommended to plant rosemary near oregano .

Causes

The kingdom Fungi that make powdery mildew flourish in warm , teetotal ( not showery ) areas . Unlike many kingdom Fungi that develop when urine sits on the leaves of plant ( usually do leaf slur ) , these species do not travel on water . What they do need , however , is high-pitched humidness , harmonise to Colorado State University . As humidity increases , so does the likeliness of powdery mold development .

Prevention

Plants that are crowded together do not have good air circulation . This can increase the immediate humidity in the area , leading to the development and spread of the fungal spore that cause powdery mildew . Herbs should be spaced so that there is plenty of room for air to circulate around the plant . Do not use N - free-base fertilizers latterly in the summer , as this will advertise new growth , which is especially susceptible to these fungi .

Treatment

Removal of septic parts of the plant can limit the spread of the fungus . Do not compost the farewell , however , as this does not usually kill the spores , which can then unfold to other plants when the compost is used . Prune overcrowded plants back so that the air can diffuse . antifungal that contain neem oil , atomic number 16 , atomic number 19 hydrogen carbonate or triforine can be in effect used , harmonise to Colorado State University .

References

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