In the southeastern United StatesC. cucurbitarumcan be a parasite (Wet Rot) of various crop plants, including summer squash (yellow crookneck) and green beans, but many other plants are infected as well (Kucharek and Simone, 1983).Choanephorahas been monographed by Mil’ko and Beljakova (1970) and Kirk (1984). (Zygomycetes.org 2005)
CHOANEPHORACurrey, 1873 (J. Linn. Soc., Bot. 13:578); 2 spp. (Kirk, 1984—monograph.).
=CunninghamiaCurrey, 1873 (J. Linn. Soc., Bot. 13:334).
=ChoanephorellaVuill., 1904 [Bull. Soc. Mycol. France 20:28;nomen nudum, Art. 41.1 of theICBN(Greuter et al., 2000)].
Choanephora(Kirk 1984) produces sporangia and zygospores that are nearly identical to those formed by species ofBlakeslea; the large and small sporangia are also formed on separate sporangiophores; small sporangia are formed in fertile heads. The small sporangia of both species ofChoanephoraare unispored and the sporangial wall lacks a suture and, as a result, the walls of the spore and unispored sporangium are not readily separable. The separation of these two walls has been reported in the literature (Thaxter 1903; Poitras 1955).
Choanephora cucurbitarum is a fungal plant pathogen that causes fruit and blossom rot of various cucurbits. It can also affect okra, snap bean, and southern pea, and may cause a stem and leaf rot of Withania somnifera. Recently Das et al. 2017 added few more patho-index on aubergine (Solanum melongena L.), teasle gourd (Momordica subangulata Blume subsp. renigera (G. Don) de Wilde, hyacinth bean (Lablab purpureus (L.) Sweet), green pea (Pisum sativum) from India. Wet weather, high temperature and high humidity favor disease development from inoculum that is typically soil-borne. Signs of infection on fruits or leaves include water-soaked, necrotic lesions, which progress rapidly under ideal conditions. As the fungus begins to produce spores, affected tissues become dark grey-brown and hairy as a result of the superficial sporangia.
Sporangiophores bearing sporangiola are erect, hyaline, unbranched, and apically dilated to form a clavate vesicle, from which arise dichotomously branched, distally clavate secondary vesicles. The sporangioles are indehiscent, ellipsoid, brown to dark brown with distinct longitudinal striations and measure 12-20μm x 6-12μm. Sporangia are multispored, spherical, initially white to yellow, pale brown to dark brown at maturity and measure 40-160μm. Sporangiospores from sporangia are ellipsoid to broadly ellipsoid, brown to dark brown, indistinctly striate with fine hyaline polar appendages, and measure 16-20 µm x 8-12 µm (Saroj et al. 2012).
Choanephora cucurbitarum (Choanephoraceae Mucorales) on Pumpkin flower Japanese name;Kougaikekabi
Choanephora cucurbitarum (Choanephoraceae Mucorales) incubated in wet chamber Japanese name;Kougaikekabi
Choanephora cucurbitarum (Choanephoraceae Mucorales) incubated in wet chamber Japanese name;Kougaikekabi
Choanephora cucurbitarum is a fungal plant pathogen that causes fruit and blossom rot of various cucurbits. It can also affect okra, snap bean, and southern pea, and may cause a stem and leaf rot of Withania somnifera. Recently Das et al. 2017 added few more patho-index on aubergine (Solanum melongena L.), teasle gourd (Momordica subangulata Blume subsp. renigera (G. Don) de Wilde, hyacinth bean (Lablab purpureus (L.) Sweet), green pea (Pisum sativum) from India. Wet weather, high temperature and high humidity favor disease development from inoculum that is typically soil-borne. Signs of infection on fruits or leaves include water-soaked, necrotic lesions, which progress rapidly under ideal conditions. As the fungus begins to produce spores, affected tissues become dark grey-brown and hairy as a result of the superficial sporangia.
