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Title: "New strategy for managing damping-off and root rot disease of
Cucumber caused by Rhizoctonia solani by Seed Soaking in Formula of
Antioxidant with Micronutrients"
Abstract:
Cucumber is one of many susceptible crops to damping off and root rot
disease caused by Rhizoctonia solani. Sclerotia of R. solani can be remain
viable in soil for several years as important source of primary infection,
In our laboratory trails, The soaking of R. solani sclerotia in Potassium
tartarate as antioxidant and a mixture of micronutrients for 48 h showed a
great reduction in colony diameter reach to 52% with complete inhibition of
sclerotia formation after 24 d of incubation. For more investigation, the
treated sclerotia examined under SEM which showed germ hyphae alteratioins,
includes, changes in measurements of hyphae, increased branches, reduce
length of branches, retardation of the plasmolemma and collapse of cytoplasm.
By application of this formula in greenhouse, the seedling stands up
increased by 46.4% on day 6 and 60.9 % respectively on day 14 over check
ones. In addition to seedlings protection, treatments also improve plant
height, fresh weight of shoot and root with clear increase in total phenol
contents. In field experiment highest fruit production as well as increase
in nitrogen, phosphor, potassium and protein content of fruits. This
information sheds new light on environmental factors that influence plant-
pathogen interactions, and may be applied to develop a management strategy
for R. solani control based on host nutrition. |
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