Gray Mold of Primula Caused by Botrytis cinerea

Kwon, Jin Hyeuk; Park, Chang Seuk

Research in Plant Disease 2002;8(1):66-69.
Published online March 30, 2002.

Botrytis cinerea에 의한 프리뮬러 잿빛곰팡이병

권진혁, 박창석

Gray Mold of Primula Caused by Botrytis cinerea

Jin Hyeuk Kwon, Chang Seuk Park

Abstract

In February of 2002, the gray mold disease occurred severely on primular(Primular spp.) grown in a flower nursery farm in Jinju, Korea. At first, the infected leaves were discolored to gray or dark from the tip and gradually expanded to die. The fungus attacked not only leaves but petals, calyx, flower stalk and stems. Conidia of the fungus in mass were hyaline or gray, 1-celled, mostly ellipsoid or ovoid and sized 6.8~16.9×4.6~12.4 mm. Conidiophores were wide of 15.9~31.6 mm in size. The sclerotia were readily formed potato-dextrose agar and optimum temperature for sclerotial formation was 20oC. Pathogenecity of the causal organism was and proved according to Koch`s postulate. The causal organism was identified as Botrytis cinerea based on mycological characteristics. This is the first report on gray mold of primula caused by Botrytis cinerea in Korea.

Key Words: Botrytis cinerea, gray mold, primula