[Survey on field experiments, G: Plant protection]

allium cepa barley beta vulgaris cebada cultivos de invierno culture d'hiver enfermedades de las plantas escarda gramineas graminee grasses maladie des plantes malezas mauvaise herbe orge pesticide pesticides pests of plants pisum sativum plagas de plantas plaguicidas plant diseases ravageur des plantes secale cereale triticum weed control weeds winter crops zea mays