Comparative Analysis between Healthy and Powdery Mildew-infected Plants of Strawberry Cultivar Seolhyang

Research in Plant Disease 2012;18(2):80-85.
Published online June 30, 2012.

보문 : 딸기 설향품종의 흰가루병 건전 및 감염식물 비교 분석

남명현 ( Myeong Hyeon Nam ) , 전이내 ( Yi Nae Jeon ) , 이희철 ( Hee Chul Lee ) , 이희덕 ( He Duck Lee ) , 강희경 ( Hee Kyoung Kang )

Comparative Analysis between Healthy and Powdery Mildew-infected Plants of Strawberry Cultivar Seolhyang

Myeong Hyeon Nam*, Yi Nae Jeon1, Hee Chul Lee, He Duck Lee and Hee Kyoung Kang1

Nonsan Strawberry Experiment Station, Chungnam ARES, Nonsan 320-862, Korea
¹Department of Horticulture, Kongju National University, Yaesan 340-702, Korea

Received: February 15, 2012 Revised: May 29, 2012 Accepted: May 31, 2012

Abstract

We examined the incidence of powdery mildew in strawberry cv. Seolhyang plants, and performed a comparative analysis on the temperature, photosynthesis rate, and nutrient content of healthy and powdery mildew-infected plants. Powdery mildew first infected the fruit of the strawberries in mid-January, and the disease severity increased in both fruits and leaves during the late harvest season. The rate of photosynthesis and leaf temperatures of healthy plants were higher than those of powdery mildew-infected leaves and significantly decreased with an increase in the disease severity. The healthy and powdery mildew-infected plants in the soil analysis were not significantly different in chemical compositions. The leaves of the healthy plants contained lower potassium and higher manganese and chlorophyll concentrations than the powdery mildew-infected plants. In particular, manganese was significantly higher in healthy leaves than in infected leaves. Therefore, the concentrations of potassium, manganese and chlorophyll in strawberry leaves may be an important factor for disease suppression.

Key Words: Healthy plant, Manganese, Seolhyang