A number of methods reported to be effective in the production of spores of Botrytis tulipae gave unsuccessful results. Both macro- and microconidia were, however, obtained by growing the fungus on living tulip leaves and petals in moist chambers.Comparisons in vitro showed thiram and ferbam to be effective against Botrytis tulipae at lower concentrations than either chloranil or Vancide 51. Sodium o-phenylphenate was intermediate at the LD95 point but its probit log concentration regression line was of steeper slope than those of thiram, ferbam, or chloranil which were parallel. This parallelism is a good indication that these compounds have a similar mechanism of action. These chemicals, when applied to infested tulip bulbs, did not control botrytis blight. This failure is probably due to their inability to penetrate the outer white bulb scale and hence reach the deep-seated mycelium of the causal fungus.