Growing Success 20300573 Natural Power Disease & Fungus 800ml RTU, GREEN

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The majority of the growth of most powdery mildews is found on the plant surface. The fungus sends feeding structures into the surface cells, greatly reducing the vigour of the plant. Because of this surface growth, powdery mildews are even more influenced by the environment than other plant diseases. Choosing the right plant for the right place, along with some simple measures to adjust the environment can go a long way to minimising powdery mildew issues in gardens. Use all year round, indoors and out. When applied on edibles there is no harvest interval – just wash before eating. Growing Success Disease & Funghus should be used preventatively or at first sign of infestation. The RHS believes that avoiding pests, diseases and weeds by good practice in cultivation methods, cultivar selection, garden hygiene and encouraging or introducing natural enemies, should be the first line of control. If chemical controls are used, they should be used only in a minimal and highly targeted manner. Non-chemical control Provide good drainage, but water regularly during dry periods (plants suffering from regular but intermittent drought-stress are more susceptible). Application of mulch may help water retention Avoid overhead watering as this increases humidity around the foliage, which makes the plants more prone to powdery and downy mildews

As with other powdery mildews, these species grow initially over the leaf surface, feeding from the tissues but not killing them, and producingairborne spores which spread infection.Later the tissues die and, unusually for powdery mildew infection, drop out leaving holes and tattered edges to the leaves. An overwintering stage is of minor importance, most survival through the winter is as mycelium on the evergreen leaves. Little can be done by cultural means to prevent infections when conditions are suitable. Plants may sometimes'grow through' the problem, with new leaves being unaffected when growing conditions change so that they are less conducive for the diseases Like that of most powdery mildews, the majority of the growth of rose powdery mildew is on the surface of the plant. This exposed growth makes it susceptible to a range of chemical control measures. Mulch plants each season to avoid drought stress, which predisposes them to powdery mildew infection, and make sure vines are adequately watered helping to prevent this problem

Theproducts above also have recommendations for control of powdery mildew, as do products containing sulphur(Fungus Clear Ultra 2, Mildew Clear for Edibles, Roseclear 3-in-1 action (with fatty acids)). Ensure that any leaves falling prematurely from an infected plant are collected up and disposed of (by burning, burial or consigning to the council green waste). Heavily-infected shoots could be trimmed off and disposed of in the same way. Fungicides for gardeners (Adobe Acrobat pdf document outlining fungicides available to gardeners) Links We know how important your garden is to you. We've listened to our customers and introduced a new improved speedy delivery service, meaning Express deliverycomes as standard.

Ornamentals:The fungicides sulphur (Fungus Clear Ultra 2, Mildew Clear for Edibles), tebuconazole (Provanto Fungus Fighter Concentrate), tebuconazole with trifloxystrobin (Provanto Fungus Fighter Plus, Toprose Fungus Control & Protect), and triticonazole (Fungus Clear Ultra) are approved for the control of powdery mildewson ornamental plants. Powdery mildew: the powdery mildew fungus over-winters in the buds and when these start to growin the spring it produces airborne spores which spread the disease. The pathogen originated in north America, but is now present wherever vines are grown. Leaf infection reduces plant vigour. When fruits are infected they split as they expand and this allows secondary infection by grey mould ( Botrytis cinerea). Fruits damaged by powdery mildew are often then infected by the grey mould pathogen androt, or become mummified The leaf spot pathogens Stigmina and Eupropolella cause brown spots on the leaves. The centres of the spots may eventually fall out, leaving irregular holes in the leaves that resemble damage from shotgun pellets – hence 'shot-hole'. Spots caused by Eupropolella are larger than those of Stigminaand sometimes havefungal fruiting bodies visible, and can lead to large parts of the leaf being shed Don’t plant too densely, giving space between plants. Aim for an open environment to increase air circulation and reduce humidityProlonged leaf wetness is not required for infection by p owdery mildew, but high humidity is, so providing good air circulation is still important. Avoid drought stress and the overuse of nitrogenous fertilisers. Chemical control Further information on the management of downy mildews, powdery mildews and grey mould can be found in the advice profiles on the links below: Because most of the growth of powdery mildews is found on the plant surface they are easily targeted with fungicides. Unusually for powdery mildew infections, the brown tissue then drops out, often leaving irregular holes in the leaves, and tattered edges which look more like insect damage than disease. The marginsof the holes often have a corky, brown appearance

Sometimes growth of the powdery mildew fungus is sparse and the symptom is a grey or purplish discolouration of the leaves The fungicides sulphur (Fungus Clear Ultra 2, Mildew Clear for Edibles), tebuconazole (Provanto Fungus Fighter Concentrate), tebuconazole with trifloxystrobin (Provanto Fungus Fighter Plus, Toprose Fungus Control & Protect), and triticonazole (Fungus Clear Ultra) are labelled for the control ofrose powdery mildew.

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Growing Success Fungus Stop is a pesticide-free alternative to help prevent disease on fruits, vegetables and flowers as well as ornamental plants. Its formulation contains natural ingredients and will not harm beneficial insects such as bees and ladybirds. It works by promoting a plant reaction to defend itself against a wide range of pests such as Powdery Mildew, Fruit Scab, Rust, Leaf Spot and more. Most powdery mildew fungi have a host range restricted to a relatively few, related plants, but these can include wild relatives which can be sources of infection, e.g. wild crab apples may be sources of infection for apple orchards.

Downy mildew: the downy mildew pathogen survives over winter as resting spores in dead, infected leaves. These initiate new infections in the spring. Subsequent infections occur from airborne spores produced on these initial infections. Wet conditions are required for infection to occur and the disease is very seldom seen on vines grown under glass. The pathogen is an obligate biotroph (it feeds on the living cells for extended periods without killing them, and cannot live on dead plant material). Vitis vinifera is susceptible; other Vitis spp. and related Parthenocissus spp. (Boston ivy, Virginia creeper) and Ampelopsis are less affected. Stemphyliumsp. causessmall, dark brown or purple spots on the leaves. The spots do not merge together, nor enlarge in size. The centre of the lesion can sometimesbecome pale in colour. The infected leaves shrivel prematurely and can either remain on the plant or drop off. Clean up and destroy fallen leaves to reduce the amount of the downy mildew pathogen surviving the winter There are no products available to amateur gardeners for the control of either downy mildew or grey mould.Fungicides are likely to need several applications during the growing season, particularly in still, humid weather. Sprays in late summer and early autumn may help to reduce the number of infected buds in which the fungus can overwinter. Destroying fallen infected leaves in autumn will reduce the amount of infectious spores next spring. Promptly pruning out infected shoots will reduce subsequent infection.