Downy Mildew

[bixy]

...on my lettuces. Any ideas for a cure? I have pulled off the infected leaves but imagine it will return.

Patrick

[Alex H]

[quote user="bixy"] but imagine it will return.

[/quote]

Indeed - sounds to be a right pain [:(]

RHS says this;

• Limit damage by increasing space between plants to improve
  air circulation and reduce humidity. Keep water off the leaves of glasshouse-grown plants.(Errr... tricky!!)

• Remove and dispose of affected leaves and any severely affected plants.
• Remove all crop debris at the end of the season.
• Rotate crops, so lettuce is not grown on the same land
  for at least three years.
• Check your seed catalogues and grow resistant varieties
  such as 'Avondefiance', 'Beatrice', 'Musette' and 'Valmaine'.

Chemical control

Spray plants with mancozeb (Dithane). Ensure that you comply with the harvest interval.

[bixy]

Thanks for that. Any idea what name Dithane is sold under in France? I would also be interested in bio solutions, if any.

Patrick