“…Examples of quantitative estimates of seed yield losses from field experiments with natural spread include ones with CMV and BYMV in lupin where yield losses of up to 66% occurred (Bwye, Jones, & Proudlove, 1994;Jones, 2001;Jones, Coutts, & Cheng, 2003), CMV in chickpea where yield losses were up to 80% ( Jones, Coutts, Latham, & McKirdy, 2008), and PSbMV in pea where yield losses of up to 25% occurred (Coutts, Prince, & Jones, 2009). Yield losses from field experiments with other combinations of virus and cool-season grain legume crops are given by Alkhalaf, Kumari, Haj Kasem, Makkouk, and Al-Chaabi (2010), Boswell and Gibbs (1983), Bos et al (1988), Cockbain (1983), Franz, Makkouk, and Vetten (1997), Kraft and Hampton (1980), Kumari and Makkouk (1995), , Makkouk, Kumari, and Bos (1993), and .…”