Survey of virus diseases of cucurbits in the Batinah region of the Sultanate of Oman
1997
Zouba, A.A. | Khan, A.J. | Lopez, M. | Al-Maqbaly, Y.M.
A survey of cucurbit virus diseases in the Batinah region was conducted during the 1994/95 and 1995/96 growing seasons. A total of 320 commercial cucurbit fields were visited between October and April. The disease incidence of various cucurbit species was determined by randomly examining 100 plants in each field. A total of 716 symptomatic samples were collected from 320 squash, watermelon, muskmelon, cucumber, pumpkin and bottlegourd fields. Samples were tested for the presence of viruses by enzyme-linked immunosorbent assay (ELISA). The average disease incidence at harvesting time, as assessed by symptomatology, ranged from 34.2 to 78.1 during the 1994/95 growing season and 25.6 to 75 during the 1995/96 season. Pumpkin, squash and bottlegourd showed relatively high incidence of viral diseases. Results of ELISA tests, obtained by using 8 antisera, revealed the presence of watermelon mosaic virus 2 (WMV-2), zucchini yellow mosaic virus (ZYMV), papaya ring spot virus (watermelon strain) (PRSV-W), cucumber mosaic virus (CMV), squash mosaic virus (SqMV), tomato ring spot virus (ToRSV), tobacco ring spot virus (TRSV) and tomato spotted wilt virus (TSWV-2 and ZYMV were the most frequently found viruses. They were detected in all cucurbit species throughout the Barinah region. Over the two seasons of this study, 46 of the infected samples collected harboured more than one virus
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