Use disease-free seed. Grower should consult seed catalogs for current information on resistant varieties. Erisiphe cichoracearum or Sphaerotheca fuliginea 1. Promoted by heavy dews and high humidity. White powdery mildew growth on leaves and stems.
Premature defoliation can result.
Loss of leaves can result in sunburn of fruit. Apply fungicide spray at 7-14 day intervals when symptoms appear. Roots knotted with small to large galls. Top of plants may wilt on sunny days with adequate moisture. Plants may be stunted.