Aphids

Introduction Aphids weaken and destroy plants by sucking out the life-giving sap from leaves, stems and fruits. Plants attacked by aphids get yellow leaves and start to wilt, slowly dying. Aphids are also transporters of viral and bacterial plant infections. Description Aphids, also known as plant lice and in Britain and the Commonwealth as greenflies, […]

What could be wrong with my roses?

WHAT IS WRONG WITH MY ROSES? Whenever one thinks that the roses in a garden are not growing well or do not look healthy or even abnormal it is best to correctly identify the problem and the cause before attempting to spray with a pesticide. Very often it is a growing problem that reduces the […]

Downy Mildew

Introduction Downy mildew refers to any of several types of oomycete microbes that are obligate parasiteof plants. Downy mildews exclusively belong to Peronosporaceae. Downy Mildew is not as widespread and much more dependent on ideal temperatures and moisture conditions to cause devastating results on roses. Description Downy Mildew symptoms occur on leaves, stems, peduncles, calyxes […]

Rust

Introduction Ludwig’s Roses on: Rust is a disease caused by the parasitic fungus Phragmidium tuberculatumand and some other closely related species. It is specific to roses, and appears in spring and persists until the leaves fall. Susceptibility to rust varies widely among rose cultivars, and most modern roses are resistant to rust. Rose rust is the […]

Botrytis

Introduction           Prevalent especially during cool, wet weather. The disease is caused by several strains of the fungus Botrytis cinerea and attack blooms and canes, but is rarely seen on rose leaves. Blooms become spotted, then brown and finally completely rotten, in severe cases the stems can be affected and die back completely. Description During […]

Powdery Mildew

Introduction       Powdery mildew is one of the most common foliar diseases of roses. It is caused by the fungus Podosphaera pannosa. The conspicuous white growth can affect all aerial parts of the plant, but mainly new soft growth – producing microscopic spores that spread the disease. High humidity is favourable for infection, as well as plants […]