Influence of CGMMV Infection Times on Growth and Quality of Watermelon and Cucumber

Ko, Sug Ju; Lee, Yong Hwan; Lee, Tae Seon; Yang, Kwang Yeol; Park, Jin Woo; Choi, Hong Soo

Research in Plant Disease 2004;10(1):48-52.
Published online March 30, 2004.

CGMMV 감염시기가 수박과 오이의 생육 및 품질에 미치는 영향

고숙주, 이용환, 이태선, 양광열, 박진우, 최홍수

Influence of CGMMV Infection Times on Growth and Quality of Watermelon and Cucumber

Sug Ju Ko, Yong Hwan Lee, Tae Seon Lee, Kwang Yeol Yang, Jin Woo Park, Hong Soo Choi

Abstract

We investigated the effect of infection time of CGMMV on the growth and quality of watermelon and cucumber plants. The effect (damages by CGMMV) was estimated on the watermelon where CGMMV had been inoculated at different growth stages, vegetative (transplanting stage, vegetative growth stage) and reproductive growth stage (fruiting stage and fruit hypertrophy stage). In the case of cucumber, CGMMV was inoculated at transplanting stage and first flowering stage, respectively. When watermelon was infected with CGMMV at vegetative growth stage, vine length, internode length, leaf area, and fruit weight of the plants largely decreased compared with control plants, while the infected plant growth was not very different from control plants when it was infected at reproductive growth stage. Brix of the fruit of watermelon also decreased when the plants was infected with the virus earlier than fruiting stage. The occurrence of ``Pisubag``, internal discoloration and decomposition of watermelon fruits, tended to be increased as earlier infection time with CGMMV. In the case of cucumber, infection time with CGMMV did not influence earlier growth of the plants, but did later growth showing that plant height, vine length, internode length, number of leaf, leaf wide, and leaf length of the plants decreased as infection time became to be earlier.

Key Words: CGMV, Cucumber, Growth stage, Temperature, Watermelon