Cross Protection Among Strains of Verticillium Dahliae on Sunflower

Cross-protection of cotton against Verticillium wilt by Verticillium nigrescens

“…It is believed that cross-protection of cotton to a severe isolate of V. dalhiae was possible due to accumulation into xylem of antifungal secondary metabolites in response to (Zaki et al, 1972;Schnathorst and Mathre, 1996). Finally, we can concluded that the crossprotection phenomenon reported in the present study is a form of a biological control occurred in nature and may have application in control of wilt diseases in plant (Price and Sackston, 1989;Huertas-Gonzalez et al, 1999;Erdogan et al, 2013). …”

Co-Occurrence of Defoliating and Non-Defoliating Pathotypes of Verticillium Dahliae in Field-Grown Cotton Plants in New South Wales, Australia

“…Shittu et al [25] reported the VW disease scores were reduced by half on tomato plants co-inoculated with the highly virulent Vd1 and endophyte Dvd-E6 isolates compared with those recorded from single-inoculated tomato with Vd1. Sunflower challenged prior with the avirulent isolate P6 was protected from sequential inoculation with a virulent isolate of VM, V. dahliae; however, simultaneous inoculation of the two isolates did not result in different disease expressions [24].…”

“…Qin et al [ 23 ] also reported that a soil drench with V. tricorpus in advance of the inoculation with V. dahliae appeared to provide better protection compared with simultaneous inoculation using a root-dip method. On the other hand, simultaneous inoculation of the avirulent isolate P6 and the highly virulent isolate VM of V. dahliae did not result in any difference in disease expression on sunflower; however, sequential inoculation of the isolate VM two days following the challenge with the isolate P6 resulted in a significantly lower disease severity in sunflower [ 24 ]. Shittu et al [ 25 ] found that disease scores in tomato were significantly lower in plants either preceding inoculation with the non-host isolate Dvd-E6 followed by the virulent isolate Vd1 of V. dahliae or in simultaneous inoculation.…”