“REACCIÓN DE GENOTIPOS DE Capsicum spp. A Phytophthora capsici Leonian”

Abstract

PHYTOPHTHORA CAPSICI IS A HIGHLY DYNAMIC AND DESTRUCTIVE PATHOGEN, RESPONSIBLE FOR CAUSING ROT IN ROOT, CROWN AND FRUIT, AND BLIGHT IN LEAVES AND STEMS, IN AN IMPORTANT GROUP OF VEGETABLES, WHERE THE PEPPER IS INCLUDED. THE AIM OF THE RESEARCH WAS TO EVALUATE THE PHENOTYPIC REACTION OF TEN GENOTYPES OF CAPSICUM SPP. TO P. CAPSICI IN SEEDLINGS AND ADULT PLANTS, AND FRUITS. THE TRIAL WAS CARRIED OUT DURING THE MONTHS OF JANUARY AND AUGUST 2018 IN GREENHOUSES OF THE FACULTAD DE INGENIERÍA AGRONÓMICA (FIAG) DE LA UNIVERSIDAD TÉCNICA DE MANABÍ (UTM). PLANTS AND FRUITS OF C. ANNUUM (MARCATO, QUETZAL, NATHALIE, CALIFORNIA WONDER AND 2254 "B"), C. CHINENSE (9129), C. BACCATUM (12831) AND C. FRUTESCENS (11995, 12967 AND CODE 5) WERE INOCULATED WITH THE ISOLATED FIAG-M5 OF P. CAPSICI. THE REACTION OF SEEDLINGS AND ADULT PLANTS TO ROOT AND CROWN ROT WAS DETERMINED THROUGH SOIL INFESTATION WITH RICE GRAINS CONTAINING THE PATHOGEN, WHILE PLUGS OF V8 AGAR CULTURE MEDIUM WERE USED FOR THE REACTION TO FRUIT ROT CONTAINING P. CAPSICI 7 DAYS OLD. A RANDOM COMPLETE DESIGN WAS USED IN THE SEEDLING AND FRUIT EXPERIMENT, AND A RANDOMIZED COMPLETE BLOCK DESIGN IN THE ADULT PLANTS. AN ANOVA WAS PERFORMED IN FIRST INSTANCE.