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  • Author or Editor: Christine G. Fisher x
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Six cultivars of broccoli [Brassica oleracea L. (Italica Group)] were grown from transplants in Spring and Fall 1984 at Bixby, Okla. The objectives were to evaluate yield losses due to wirestem (caused by Rhizoctonia solani Kuhn) and/or wind injury, cultivar differences in susceptibility, and fungicide effectiveness. Fungicide treatments included an untreated control and application of iprodione at 1.14 kg·ha−1 as either a drench with the starter fertilizer solution or through sprinkler irrigation (chemigation). Iprodione seemed useful for control of R. solani, although the proportion of injured plants infected by R. solani was significantly reduced only in the fall. However, the fungicide treatments did not increase marketable yields significantly over the control. No significant differences in susceptibility to R. solani were shown among the cultivars. Most injured plants not infected by R. solani apparently sustained wind damage. ‘Excalibur’ was especially susceptible to wind-induced stem breakage. Chemical names used: 3-(3,5-dichlorophenyl)-N-(l-methylethyl)-2,4-dioxo-l-imidazolidinecarboxamide (iprodione).

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