Control of Plant Virus Diseases by Cultural Methods

Abstract

AT the Cheshunt Research Station, a study is being made of the interaction of environmental factors on the virus diseases of glasshouse crops, in the light of recent physiological work considered in conjunction with the empirical cultural methods practised by commercial growers. In tomato culture, the “growing out” of a virus disease is frequently practised by horticulturists when the accepted methods for control, such as roguing and the exercise of hygienic measures, have become impracticable because of widespread infection in crop plants too large to make replacement an economic proposition.