#449 doversoul, if the variety was 'Ferline', 'Legend' or 'Fantasio' according to RHS advice it will show some resistance, but will eventually succumb, especially if the weather is wet.
If you could give the tomatoes some protection from the rain, eg by growing against a wall and putting a clear polythene roof over them, that will reduce the likelihood of infection.
Strictly speaking, if Bordeaux Mixture and copper oxychloride are no longer approved for use as pesticides it would be illegal to use them, even though it is legal to hold the ingredients. Not that I think for a moment the Pesticide Safety Directorate has the resources or inclination to come checking up on private gardeners. I would be more cautious on an allotment, though, because some people have very strong views about pesticide use, even something as innocuous as Bordeaux Mixture.
Do not be tempted to use any of the stuff you can buy in Homebase for control of rose black spot, etc, on your tomatoes to control blight. Apart from being illegal, it wont work on blight, you need a special range of fungicides that are not available to amateur gardeners. If you know anyone in the farming business who can get you a fungicide containing metalaxyl, that would work on blight, but I couldnt possibly endorse such a thing, because it would be illegal to use it on amateur gardeners' crops.
If you could give the tomatoes some protection from the rain, eg by growing against a wall and putting a clear polythene roof over them, that will reduce the likelihood of infection.
Strictly speaking, if Bordeaux Mixture and copper oxychloride are no longer approved for use as pesticides it would be illegal to use them, even though it is legal to hold the ingredients. Not that I think for a moment the Pesticide Safety Directorate has the resources or inclination to come checking up on private gardeners. I would be more cautious on an allotment, though, because some people have very strong views about pesticide use, even something as innocuous as Bordeaux Mixture.
Do not be tempted to use any of the stuff you can buy in Homebase for control of rose black spot, etc, on your tomatoes to control blight. Apart from being illegal, it wont work on blight, you need a special range of fungicides that are not available to amateur gardeners. If you know anyone in the farming business who can get you a fungicide containing metalaxyl, that would work on blight, but I couldnt possibly endorse such a thing, because it would be illegal to use it on amateur gardeners' crops.
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