Shasta daisy ( Leucanthemum ) and their chrysanthemum cousin-german have a long leaning of diseases , as the University of Massachusetts Extension Service admits before list them all on a fact sheet ; yet , when given full sun , good soil that is well - drained and the right amount of water system , they ’re basically problem - barren . Humidity , too much rain , poor air circulation , heavy soil or a combination of these precondition can increase the betting odds of certain diseases consume an impact on Shasta daisies .

Leaf Spots

Alternaria and septoria are two unwashed manakin of fungous leafage smear touch on Shasta daisy . The University of Massachusetts Extension describe the symptoms of alternaria as office that embark on yellowed , grow brown and then black , eventually killing the foliage . The leaf spot usually start at the bottom of the flora . Septoria leafage spot starts the same advancement by turning the leaf butt against brown , accord to the University of Illinois Extension . Water plash from diseased plants onto sizable plants spreads the contagion . take and discard pathological leaves . If the disease is advanced , the University of Massachusetts Extension recommends using a fungicide with such active ingredients as chlorothalonil or mancozeb , applied according to label instructions .

Powdery Mildew

Powdery mould will impact the leaves and stems of the Shasta daisy , according to the University of Massachusetts Extension . It appears as a splotchy milky or gray moving picture . Leaves may finally conk out . Powdery mildew is unique in that it does n’t spread by splash water . It is triggered by high humidity and heat and is exacerbated by poor air circulation and not enough sun . The University of Massachusetts Extension commend doing what you could to improve conditions . At the first sign of the trouble , utilize a antimycotic with such combat-ready ingredients as myclobutanil or atomic number 16 .

Botrytis

Stem Rot and Verticillium Wilt

agree to the Missouri Botanic Garden , Shasta daisy may sometimes contract base rotting and verticillium wilting . The causes of stem rot can be fungi , bacteria or nematodes ( microscopical organisms ) in the soil . If the industrial plant is exhibiting symptoms of stem hogwash , the problem is too far advanced and the plant should probably be removed . The disease stays in the soil , so do n’t establish in the same location . The Missouri Botanic Garden mentions that a fungicide drench is available to plow some stem rot . accord to the University of Massachusetts Extension , verticillium wilt is triggered by a fungus that consist dormant in the soil . parting jaundiced and wilt from the bottom of the plant upward . The works may not recover .

References

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