Podridão mole de pimentão causada por Pectobacterium sp.: estudo da reação de cultivares e isolados dos municípios de Santarém, Mojuí dos Campos e Belterra, Pará

Abstract

Soft rot is a disease of occurrence and well distributed geographically, including the western region of Pará around the city of Santarém occurring in crops of different crops, such as: Pepper, lettuce, cabbage, tomato and chives. The Damage Caused by this disease can be high and compromisse part of the crop if the integrated control measures are omitted. Given the difficuld control of the disease and lack of technical support to producers, crops are subject to these factors that may influence the productivity and final quality of the product. The objective of this study was to study the post-harvest reaction of 3 cultivars commercialized in the city of Santarém. The fruits of the cultivars Lutero, Yellow Otto and Red Otto were obtained at the trade of the city of Santarem, wasted with running water and soap, then washed with ADE for disinfection. Arranged in DBC and inoculated with the respective isolates of Pectobacterium sp obtained from pepers, tomatoes and kale in the region ( P1,P3,P4,T3 e C3) and inoculated with suspensions calibrated to a concentration of 1,0x10⁹ UFC.mL ( DO570 =0,36) and, then, perform the experiment. The evaluation of lesion growth was measured with an electronic caliper at 12- hour intervals for 4 days. Given the conditions under which the tests were performed, it can be concluded: Lutero, Red Otto and Yellow Otto pepper cultivars were susceptible to Pectobacterium sp. Isolates, however, the variables indicated did not differ in terms of pathogen susceptibility levels. The isolates of Pectobacterium sp. They were pathogenic, virulent and aggressive, however, the variables indicate little difference in the degree of aggressiveness in peppers of the cultivars Lutero, Red Otto and Yellow Otto. The intensity of soft rot caused by the isolates P4 of pepper and C3 of leafy cabbage in the cultivars of Lutero, Yellow Otto and Red Otto cultivars suggests that the relative differences in the degree of aggressiveness may be explained by the evolution of parasitism. Keywords: