Table 3 summarizes the extent of application of chemical sprays by Bordeaux mixture
and Systemic fungicides and their channels of communication.
Spray peaches with a copper-based fungicide, such as Vitax Bordeaux Mixture
, to prevent peach leaf curl.
The time to start treatment is this month before growth starts, spraying with Bordeaux mixture
, a powder made up of copper sulphate and lime to kill many of the overwintering colonies.
For chemical control, spray with the copper-containing fungicides Bordeaux mixture
or Bayer Fruit and Vegetable Disease Control after fruit picking but before leaf fall and a second time when about half the leaves have fallen.
Spray peach and nectarine trees and bushes for peach leaf curl with the fungicide Vitax Bordeaux Mixture
and repeat after 10 to 14 days.
Spray twice with a copper fungicide like Bordeaux mixture
after harvest and before leaf fall.
To further reduce the risk of seedlings dying, water all the trays with a copper-based fungicide such as Bordeaux Mixture
Always, as a matter of course, burn affected haulms and tubers otherwise they remain in the ground as the source of next year's infection Removing all blighted leaves will reduce the spread of the disease, but the best insurance if there is a whiff of blight about, or there are two days when the temperature does not fall below 10C and relative humidity stays above 75%, is to spray with Bordeaux mixture
, or an approved proprietary brand early in July and thereafter fortnightly until the middle of September.
Follow up by spraying with a copper fungicide or Bordeaux Mixture
in late summer and early and mid-autumn.
You could also use a copper-based fungicide drench such as Traditional Copper, Cheshunt compound or Bordeaux mixture
The standard garden remedy for potato blight is Bordeaux mixture
, named because it was developed there as a remedy for downy mildew on grapes.
ADRIENNE SAYS: Spray the tree with a copper fungicide such as Bordeaux Mixture
in autumn before leaf fall, and again in January or early February before the buds swell.