[Trillium]

I don't get blackspot problems here much since we don't get the rain Uk'rs do, but here's a remedy that others swear by.

To 4 litres of water, add  1/2 tsp (2ml) mild dish soap or insectidical soap and 4 tsp (20ml) baking soda. Shake, apply weekly during growing season.

[Ann]

I get a lot of blackspot will definately try this and let you know how I get on with the remedy

[muntjac]

another one i use is fairy liquid 6to 1 in water   may not kill the black fly but they sure scrub up nice  

[Trillium]

If you've got the black fly, Munty, then get those marigolds at that spot. The smell attracts the hoverflies which then lay eggs among the blackflies so emerging larvae eat the blackflies. I've no idea what fairy liquid is.

[Ann]

I've no idea what fairy liquid is.

It is washing up liquid.

I have bought marigold seeds this year to plant near the strawberries as they were covered in black fly last year.

[Trillium]

Thanks for the info, Ann. Try to get the older, stinkier non hybrid marigold type which are far more effective. Personally I don't mind the smell, not after years of helping clean up dog, cat and baby poo.  

[noshed]

Fairy liquid is what you wear your marigolds to keep your hands nice from. Simple

[frazzy]

another good method for roses cucumbers and any thing that gets a mildew or blackspot is a 10%  milk and water solution on the foliage of the plants and yes it dose work very effectively actually.Milk works because it  contains vitamins, protein, carbohydrates and minerals. That  feeds the beneficial bacteria which protect the plant from disease. you could on the other hand use baking soda which kills the fungi but it kills the good and the bad ones.

[Trillium]

Quite frankly, Frazzy, I can't imagine any good fungi attacking roses  :?

[frazzy]

:shock:  :shock: fungas then lol   IDENTIFICATION
Black spot is caused by a fungus. It starts with circular, feathery black spots which first develop on the upper surface of leaves. These spots are frequently surrounded by a yellow halo. All infected leaves will turn yellow and fall prematurely. Purple-red lesions may also develop on first-year canes.

[Trillium]

 Think you missed my point about the good fungus attacking roses, Frazzy    

Thanks anyway, but I do know what blackspot is, just not what you're calling good fungus attacking it  

[frazzy]

DOH   lol try the milk solution though it really dose work.

[Annie]

Bit confused,are we talking about prevention or cure?The roses here had rust and black spot,the rust is now gone but the blackspot not at all.I remove all the dropped old leaves but given that it can be spread by water splash and that weare having v.wet springsas the new leaves are forming howdoessprayingeven more help.I use fairy and waterforblack fly and milk/water mix for mildew,but have not heard of these for blackspot..

[frazzy]

google it, seriously i,ve tried it on my cucumbers and roses i was scepticle too but it works.

[muntjac]

so if i use glycerine on my roses as well as the milk does that make hybrid tea?