ABSTRACT
The main objective of plant pathology is to control an increasing number of diseases and to do so with maximal effectiveness. Since suitable resistant varieties are neither always available nor available against all kinds of pathogens, the grower often is forced to resort to chemical control based on the use of chemicals with direct toxic action on the pathogen. Such control is mainly available against fungi, which constitute the most important group among the plant pathogens. However, the lack of suitable fungicides against some of the major fungal pathogens and particularly the ecological hazards to which their regular and large-scale use may lead have worried concerned scientists, prompting them to look for some suitable and safer alternative approaches to plant disease control.
