Bordeaux mixture was discovered by P.A. Millardet of France during the year 1882 following his chance observation of farmers practice for protection against:

Question:Bordeaux mixture was discovered by P.A. Millardet of France during the year 1882 following his chance observation of farmers practice for protection against:

1.Plasmopara viticola on grapevine

2.Uncinula nectar on grapevine

3.Podosphaera leucotricha on apple

4.Venturia inequalis on apple


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