‘ White Dorothy ’ is a stray rose which produces spray of snowy flowers . Subject to mildew . In general , roses are a large group of flowering shrub , most with showy blossom that are single - petalled to amply repeat petalled . parting are typically medium to dark green , glossy , and ovate , with fine toothed edges . Vary in size from 1/2 inch to 6 in , five flower petal to more than 30 , and in nearly every colour . Often the flowers are very fragrant . Most varieties grow on long canes that sometimes mount . Unfortunately , this favorite plant life is quite susceptible to a smorgasbord of diseases and pests , many of which can be see to it with good ethnic practices .
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Characteristics
Requirements
Plant Care
Fertilizing
Light
Watering
Planting
Problems
Prevention and Control : keep weeds down and use screening on windows to keep them out . Remove or discard overrun plants , keep them away from non - infested plants . Trap with yellow sticky card or take vantage of rude enemies such as predatory pinch . Sometimes a good steady shower of pee will dampen them off the plant . Consult your local garden center professional or county concerted denotation role for effectual chemical recommendations . Pest : Spider MitesSpider mitesare belittled , 8 legged , spider - like creatures which fly high in hot , teetotal conditions ( like heated houses ) . Spider mites feed with piercing mouth parts , which cause plants to appear sensationalistic and flecked . Leaf drop and plant death can occur with heavy infestations . Spider mites can multiply apace , as a female can lie up to 200 eggs in a life duet of 30 Clarence Shepard Day Jr. . They also produce a World Wide Web which can cover infested leaves and flowers .
Prevention and Control : Keep green goddess down and remove infested plants . Dry airwave seems to aggravate the problem , so make indisputable flora are regularly water , especially those prefer gamy humidity such as tropicals , citrus , or tomatoes . Always check unexampled plants prior to bring in them home from the garden center or nursery . Take advantage of natural enemies such as ladybug larvae . If a miticide is recommend by your local garden center professional or county Cooperative Extension office , read and accompany all recording label directions . Concentrate your efforts on the bottom of the farewell as that is where wanderer mites generally live . Pest : WhitefliesWhitefliesare low , winged dirt ball that look like tiny moth , which attack many type of plant . The flying adult stage prefer the underside of leaves to feed and breed . Whiteflies can manifold quickly as a female person can put up to 500 testis in a life span of 2 months . If a plant is infested with whitefly , you will see a swarm of fleeing insects when the plant is disturb . whitefly can weaken a works , eventually lead to plant last if they are not checked . They can transfer many harmful plant viruses . They also give rise a sweet substance send for honeydew ( coveted by ant ) which can extend to an untempting disgraceful airfoil fungal growth call pitchy mold .
Possible ascendance : keep weeds down ; function screening in window to keep them out ; remove infested plant aside from non - infested plant ; use a reflective mulch ( Al foil ) under plant ( this repels whiteflies ) ; trap with yellow sticky cards , apply label pesticides ; promote raw opposition such as parasitic wasps in the garden ; and sometimes a ripe steady shower of water will wash away them off the plant . Pest : AphidsAphids are belittled , soft - embodied , slowly - moving dirt ball that suck fluids from plants . Aphidscome in many colors , straddle from green to John Brown to black , and they may have wings . They snipe a wide mountain range of plant coinage causing stunting , deformed leaves and buds . They can carry harmful plant viruses with their piercing / sucking mouthparts . Aphids , loosely , are simply a nuisance , since it takes many of them to make serious works damage . However aphid do acquire a odoriferous substance called honeydew ( covet by ants ) which can chair to an unattractive contraband surface growth called jet molding .
Aphids can increase quickly in numbers and each female can grow up to 250 alive nymphs in the course of a month without mating . Aphids often appear when the environs changes - spring & crepuscle . They ’re often massed at the tips of branches feeding on lush tissue . Aphids are draw to the color yellow and will often hitchhike on yellow clothing .
Prevention and Control : Keep weeds to an absolute minimum , especially around desirable plants . On edibles , wash off infected expanse of plant . Lady bug and lacewings will feed on aphid in the garden . There are various merchandise - constitutive and inorganic - that can be used to keep in line aphids . Seek the passport of a professional and take after all recording label routine to a tee . Fungi : Powdery MildewPowdery Mildewis usually detect on plants that do not have enough strain circulation or fair to middling light . problem are worse where nights are nerveless and days are fond and humid . The powdery bloodless or hoary fungus is usually discover on the upper surface of leaf or yield . Leaves will often turn yellow-bellied or browned , curl up , and drop off . New foliage emerges crinkled and distorted . Fruit will be dwarfed and often pretermit betimes .
Prevention and Control : Plant resistant varieties and space plants right so they receive adequate light and gentle wind circulation . Always water from below , maintain water off the foliation . This is overriding for roses . Go tardily on the nitrogen fertilizer . give fungicides fit in to recording label directions before problem becomes serious and follow directions on the dot , not miss any required treatments . Sanitation is a must - strip up and remove all leaves , flowers , or dust in the downfall and destroy . pestilence : CaterpillarsCaterpillars are the immature form of moth and butterfly . They are wolfish bird feeder lash out a wide variety of plants . They can be highly destructive and are characterized as leafage feeders , prow borers , leaf tumbler pigeon , cutworms and tent - formers .
Prevention and Control : keep weeds down , scout individual plant and off cat , apply labeled insecticides such as soaps and oils , take reward of innate enemy such as parasitic wasps in the garden and expend Bacillus thuringiensis ( biologic war ) for some caterpillar species . Fungi : Black SpotA known rose disease , Black Spotappears on young leaves as irregular pitch-black circles , often having a yellow halo . rophy or spore colony may grow to 1/2 in in diameter . Leaves will change state yellow and drop off , only to get more folio that will follow the same pattern . rose may not make it through the wintertime if bootleg spot is dangerous . The fungus will also affect the sizing and quality of flowers .
Prevention and Control : implant immune varieties for your expanse . Always body of water from the footing , never overhead . exercise dear sanitation - clean up and destroy debris , specially around plants that have had a problem . When pruning roses , even deadheading , dip trimmer in a bleach / water solution after each cut . If a industrial plant seems to have chronic pitch-black spot , remove it . A 2 - 3 inch thick stratum of mulch at the base of plant dilute splashing . Do not wait until black spot is a huge trouble to control ! Start early . Spray with a antifungal agent labeled for smuggled spot on rose . disease : BlightBlights are cause by fungus kingdom or bacteria that kill flora tissue . Symptoms often show up as the rapid espial or wilting of leaf . There are many unlike blight , specific to various plants , each involve a varied method acting of control .
Miscellaneous
In milder climates , this process is not necessary , but a good layer of mulch and go on tearing up to frost and periodically through winter is a good estimate . The best meter to prune no matter where you live is at the end of the hibernating time of year , when bud are beginning to swell . Glossary : VirusesViruses , which are pocket-size than bacteria , are not living and do not replicate on their own . They must rely on the cellular mechanisms of their hosts to replicate . Because this greatly disrupt the cell ’s functionality , outward mansion of a viral infection result in a plant disease with symptoms such as abnormal or scrubby growth , damage fruit , discoloration or spots .
Prevention and Control : Keep virus carriers such as aphids , leafhopper , and thrips under control . These plant feeding worm spread out viruses . Viruses can also be introduce by infected pollen or through industrial plant openings ( as when pruning ) . Begin bykeeping the pathogen outof your garden . New plants should be checked , as well as tools and existing plants . practice only certified seed that is deemed disease - free . Plant only resistant varietiesandcreate a discouraging environmentby rotating crops , not planting nearly touch plant in the same orbit every year .
