RECENT ADVANCES IN THE PRODUCTION OF USEFUL CHEMICAL SUBSTANCES THROUGH PLANT CELL CULTURE Adaptation of Bemisia tabaci biotype Q (Hemiptera: Aleyrodidae) to different tomato cultivars An Improved Method Suited to Extract Total RNA Used to RT-PCR from Fir Plant Suppressive effect of secondary substances on Liriomyza sativae population Suppressive effect of plant secondary substances and ecological measures on Liriomyza sativae population Relationships between several secondary substances in pepper varieties and the resistance to broad mite Polyphagotarsonemus latus (Banks)