Рет қаралды 150,857
Symptoms
Browning and dieback of the tips of young shoots in spring (usually the result of frost damage)
Browning and dieback of a pruning (horticulture) stub, which then progresses further down the branch (the result of a poor pruning technique)
Dieback of twigs, branches, main(horticulture) stems or even the whole plant at any time of year (various causes)
Fungal structures, such as(horticulture) tiny black fruiting bodies, are sometimes visible on the affected parts of the plant
In some instances there may(horticulture) also be associated root decay.
control
Plant roses in well-prepared soil, making (horticulture)sure that the roots are well spread out
Do not plant roses into soil that has (horticulture)grown roses previously, without taking remedial action. Change the soil to a depth of at least 30cm (1ft) and a (horticulture)width of at least 60cm (2ft). The use of a mycorrhizal additive at planting can also be considered although these products(horticulture) are still undergoing experimental evaluation into their effectiveness
Avoid soils that are prone to either (horticulture)drought or waterlogging
Feed plants in spring with a proprietary(horticulture) rose fertiliser and mulch the soil to prevent water loss
Remove all dead and damaged wood as soon as it is seen. Also remove weak and crossing branches(horticulture) during routine pruning
Pruning cuts should be finished (horticulture)cleanly, and made immediately above and sloping away from an outward facing bud
There are no fungicides with specific (horticulture)recommendations for the control of rose dieback. However, some incidental control (horticulture)of dieback may be achieved when using fungicides to control foliar diseases such as black spot, rust and(horticulture) powdery mildew.