Potentiality of organotin(IV) compounds in the control of foliar blight disease of wheat (Triticum aestivum) caused by Bipolaris sorokiniana

摘要

Three different types of eight organotin(IV) compounds (of which four were newly synthesised) were screened against Bipolaris sorokiniana. The new compounds were characterised by elemental, IR, 1H and 13C NMR spectral analyses. The experiments were carried out in the field and laboratory between the months of November 2006 to March 2007 and November 2007 to March 2008 at Uttar Banga Krishi Viswavidyalaya, Cooch Bihar, W.B., India. All of the organotin(IV) compounds were tested for the toxicity assay against Indian wheat (Triticum aestivum L.), cv. Sonalika. The spore germination and growth of B. sorokiniana and the biochemical changes associated with the induction of resistance by these chemicals were also tested. The influence of the organic groups (attached to tin atom) of the three different types of compounds studied on the fungicidal activity is remarkably distinct. Some of the compounds tested are more active in controlling the fungus than a commonly used commercial product.