Certified for use in organic gardening and plants can be treated up to six times a year to achieve maximum effect. The active ingredients in Roseclear, bupirimate, pirimicarb and triforine, are found in other Zeneca pesticides - Nimrod T and Rapid.

Sale and use of Roseclear, the country's top-selling fungicide and pesticide for roses, is now illegal. For best control of plant disease spray at first signs of disease and continue spraying regularly for the rest of the season.Imidaproclid and thiamethoxam, both neo nicotinoids, were both temporarily withdrawn in the EU from 2013 for a total of two years to see what the effect (if any) was on the bee population.

Treetop, I'll confess there is a rose I particularly like, and which I bought twice in different houses for myself - its Korresia, a small, yellow flowered fragrant rose, very disease resistant, never had a moment's trouble with it apart from aphids.

UK legislation requires approval for active ingredients used in all pesticides, including those for home garden use. Having said that I am now retired so I have all the time in the world to look after them, I quite enjoy the challenge.