Impatiens walleriana is the most popular industrial plant in the United States . It is an annual — a plant that complete its life cycle in one acquire time of year . After an yearly give rise its ejaculate , it dies . Due to their short growing season , annual flower almost unceasingly , more than most perennials . There are different types of yearbook , count on the temperature of the realm . Annuals , admit impatiens , also have insect and disease problems . leafage spot is a particular problem with impatiens .
Characteristics
Impatiens choose part or full shade . They are hardy in USDA geographical zone 2 - 11 . They can grow 6 inch to 1 foot grandiloquent and do well in rich , sandy loam . There are many diverseness of impatiens . They have bloom with spur petal that hail in many colors , include white-hot , pink , rise , peach , lavender and salmon . The leave-taking are broadly lustrous green , with some smorgasbord have bronze - colour leaves .
Uses
Impatiens can be planted in the garden or in container and pots . In garden they are good when planted in individual colour radical in specter garden . Pastel colors lean to stand out the proficient in shade . They flux peculiarly well with ferns , hostas and other nicety plants .
Leaf Spot
There are several different eccentric of leafage spot disease that can impress impatiens . The leaf spots alternaria and cercospora are due to a fungus . Septoria leaf spot , or septoria blight , is triggered by the species of fungi septoria . folio spot pseudomonas syringae is because of pathogens from different species of pseudomonas .
Symptoms
Alternaria ’s symptom first show as tan or browned spots with purple borders that vary with the specific fungus . The spots look on the bottom of the leaves first and slowly move up the plant .
Septoria leaf smear causes tan to gray , purple - bordered spots on the leaves . Very tiny calamitous specks also appear that are the part of the fungus . This disease is worse when it is wet and humid for prospicient periods of time .
Leaf fleck pseudomonas syringae causes spots or wilting and dying of the parting . The host plant is of import in the development of symptom and the specific pathogen make the trouble is not distinguishable to the eye .
Control & Prevention
Alternaria can be prevented by proper concern of the plant before the disease infects . inseminate and lacrimation on a regular basis are recommended . Watering too soon in the daytime gives the leaf a chance to dry out out . It is also important to remove any infected plant subject as soon as potential . antifungal can be applied but are not unremarkably necessary for this type of leaf spot .
Septoria call for right bar measures . It is recommend not to plant in the same area for two consecutive years , to take grass that are also susceptible and to remove infected works debris and plants . It is also important to water and space plant properly . Protective fungicide can be used if applications are decent spaced . The most common antifungal agent are chlorothalonii , thiophanate methyl and atomic number 29 compound .
Pseudomonas syringae can be master by take away septic plant and debris . Again , watering ahead of time in the day so that the leaves can dry out is crucial to the bar of this disease . industrial plant spacing for air movement is recommended too . antibacterial are not very effective in control this disease but are still available at garden nerve center .
References
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