![]() All are cross-compatible to varying degrees. naudinianus ( Chomicki and Renner 2015 Levi et al., 2017). It is closely related to egusi watermelon. Stagonosporopsis cucurbitacearum is seed-borne ( Lee et al., 1984), airborne ( van Steekelenburg, 1983), and soil-borne ( Bruton, 1998). ![]() GSB on watermelon plants is evident as crown blight, stem cankers, and extensive defoliation, with symptoms observed on the cotyledons, hypocotyls, leaves, and fruit ( Maynard and Hopkins, 1999). This disease also affects watermelon production in some important watermelon producing countries ( Basim et al., 2016 Huang and Lai, 2019). ![]() GSB remains an important limiting factor for watermelon production in Florida ( Keinath, 1995) and South Carolina ( Rennberger et al., 2018, 2019). In 1917, GSB was reported in the southern United States, affecting watermelon fruit in Florida ( Sherbakoff, 1917). GSB was first observed in 1891 by Fautrey and Roumeguere in France on cucumber ( Cucumis sativus L.) and in Delaware on watermelon ( Sherf and MacNab, 1986). caricae also causes leaf spot, stem rot, and fruit rot in papaya ( Carica papaya L.) ( Stewart et al., 2015). The three species are pathogenic to cucurbits, but S. This disease is caused by three genetically distinct Stagonosporopsis species, S. Gummy stem blight (GSB) is a major disease of watermelon that leads to significant economic losses. Keywords: Citrullus amarus Citrullus lanatus cultivar development disease germplasm
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