Department of Mycology and Plant Pathology, Dr. Y.S. Parmar University of Horticulture and Forestry, Nauni (Solan)- 173230
National Symposium on Strategic Issues in Plant Pathological Research held at Department of Plant Pathology, CSK HP Krishi Vishvavidayalaya, Palampur on November 24–25, 2011
Rust (U. Appendiculatus) is an important disease of French bean (Phaseolus vulgaris L.) particularly of pencil types in mid hills of Himachal Pradesh resulting in huge losses to the growers. Different cultural and chemical methods were evaluated to minimise the severity of the disease but chemical method was found to be most effective against rust. Different systemic and non-systemic fungicides were evaluated under in vitro and in vivo conditions. Minimum urediniospore germination was recorded in vatar followed by mancozeb, chlorothalonil and propiconazole. Similarly, minimum germtube elongation was recorded in Avatar followed by mancozeb, azoxystrobin and chlorothalonil while maximum was in hexaconazole. Foliar sprays of azoxystrobin (0.1%) were most effective in reducing the rust severity (4.64%) and increasing the green pod yield (6.80 kg/plot) followed by hexaconazole (0.1%) and propiconazole (0.05%). In addition to chemical method, twenty one germplasm lines were screened against U. appendiculatus under natural epiphytotic and artificial inoculation conditions. Alapa Trey, Sing Tamey and Local Selection were found highly resistant under natural epiphytotic and artificial inoculation conditions.
