Soybean crinkle leaf and cowpea mild mottle viruses.

Reference Report for IND86060303

Title:	Soybean crinkle leaf and cowpea mild mottle viruses.
Authors:	Iwaki, M.
Source:	Trop. Agric. Res. Ser. 1986, 19:92-100
Abstract:	The occurrence of these 2 whitefly-borne viruses on soyabean in Thailand was recognized for the first time in 1983 (SCLV) and 1982 (CMMV). The latter also occurred on soyabean and groundnut in Malaysia and Indonesia. SCLV, a new virus on soyabean, was transmitted by Bemisia tabaci in a persistent manner and by grafting but not by aphids, sap inoculation or through seeds of soyabean. Min. acquisition and inoculation access periods in whitefly transmission were 30-60 and c. 10-30 min, respectively. The latent period in the vector was 8-10 h and the retention period in the vector lasted 10 d. SCLV affected 11 plant spp. in the Compositae, Leguminosae and Solanaceae. Partially purified preparations contained geminate viruslike particles (c. 18 √ó 30 nm). CMMV, consisting of rod-shaped particles c. 680 nm long containing single-stranded RNA, was transmitted by B.tabaci in a semipersistent manner, by sap inoculation and through soyabean seeds, but not by aphids. Among 26 plant spp. tested by sap inoculation, the virus systemically infected mainly plants of the Leguminosae, and it produced poorly defined local lesions on inoculated leaves of Chenopodium amaranticolor.

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