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Dormant oil is used on woody plants during the dormant season. Originally used cruder oils were used, but the term now refers to the time of application. Summer oil or foliar oil refers to its use on plants when foliage is present, for which cruder grades could not be used. The US EPA recognises hundreds of grades of mineral oil. [1]
Rosa rugosa (rugosa rose, beach rose, Japanese rose, Ramanas rose, or letchberry) is a species of rose native to eastern Asia, in northeastern China, Japan, Korea and southeastern Siberia, where it grows on beach coasts, often on sand dunes. [1] It is naturalized in much of Europe and parts of the United States and Canada. [2]
Most varieties produce a single flower on a stem, but floribunda roses, introduced in the early 20th century, have a spray of several flowers, and are highly popular; they also have more continuous flowering. [6] Most garden varieties still have thorns, though fewer than those in wild species, but some are thornless.
In addition to its use to control fungal infection on grape vines, the mixture is also widely used to control potato blight, peach leaf curl and apple scab.Although it may be bad for the environment, [1] [2] some organic agriculture advocates allow its use, [citation needed] so is often used by organic gardeners in some parts of the world.
Rose aphid (Macrosiphum rosae) feeding on buds and shoots Rose rust (Phragmidium) Two-spotted mite (Tetranychus urticae) on Gardenia Yellow tea thrips (Scirtothrips dorsalis) Bristly roseslug (Cladius difformis) on the underside of a leaf Cottony cushion scale (Icerya purchasi) Leaf damage caused by a leafcutting bee (Megachile sp.) Root-knot nematode (Meloidogyne sp.) nodule damage to roots ...
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Rosa multiflora (syn. Rosa polyantha) [2] is a species of rose known commonly as multiflora rose, [3] baby rose, [3] Japanese rose, [3] many-flowered rose, [3] seven-sisters rose, [3] Eijitsu rose and rambler rose. It is native to eastern Asia, in China, Japan, and Korea.
Rosa 'Sunsprite' (syn. ' KORresia ', ' Friesia ') is a rose variety developed by Reimer Kordes and introduced in 1973. The rose was derived from the cultivars 'Friedrich Wörlein' × 'Spanish Sun', and is one of the most successful floribunda roses.