gardener have a choice of more than 200 species of pelargoniums and geranium to tot up nonstop bloom or scented , variegated foliage to their beds . The appearance of black pip on these industrial plant is a blight that requires contiguous care . There are a number of possible causes , but the most urge treatment is remotion and devastation of all infected flora tissue paper .

Leaf Spots

leafage spot disease that damage geranium can be because of fungi or bacteria , enjoin M.F. Huelsman of the Integrated Pest Management Center . They thrive in moist environments , so wet leaves due to overwatering or humid climates are the most common way they infect plants . Organisms need a wet spot for an extended time , up to 24 hr , to allow the spore to germinate and the bacteria to penetrate born openings in the leafage .

Identification

Bacteria , fungus and pests can create similar or widely unlike kinds of spots . Some that start as swooning green or white-livered can wrick brown ( which can come along disgraceful ) in the center or around the edge . fungous leaf blot are typically brown or black and scattered across leaves . Dark berth on the underside of a leafage surrounded by homocentric rings are the rust fungus fungus . Spider mite feed on leaves can induce a speckled surface . fore bunk shows as a grim spot at earth level or where a subdivision joins the stem . Any abnormal spot is a sign a plant needs help .

Prevention

The best prevention come with purchasing disease - free stock certificate from cultivator who test for disease regularly , plant pathologist at North Dakota State University say . Consider planting species such as Martha and Lady Washington geraniums that are naturally resistive to disease such as the common bacterial blight .

Defense

Do n’t give disease a chance to start . Keep leave teetotal by watering at soil level in the sunrise . This provide any spattered daub to dry out in the sun . Inspect plants on a regular basis . Many fungous and bacterial contagion appear first as spot on the undersurface of leave-taking , so turn leaves over when checking geranium . Watch for spots on all plants because other metal money can taint geraniums .

Treatment

Bess Dicklow of the University of Massachusetts Plant Extension Diagnostic Lab says there are no spraying or drenches that will cure bacterial diseases such as the common bacterial blight . disease overspread from infected foliation , grunge or piss , so the initial treatment is to remove and demolish all infected foliage and disinfect putz including hose nozzle . If the infection is widespread , entire plants should be destruct to stop the disease . Keep geranium bed clean . In frigid climates , remove all plant debris in the fall to forestall reinfection in the outflow . fungicide or pesticide can be in force against hemipteran and fungi .

References

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