Graduate Thesis Or Dissertation
 

Mechanisms of resistance in broccoli, Brassica oleracea italica to the garden symphylan, Scutigerella immaculata (Newport)

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  • Studies were conducted on the mechanisms contributing to resistance in broccoli, Brassica oleracea italica, to the garden symphylan, Scutigerella immaculata (Newport). Differences in resistance to symphylan injury were shown between five selected broccoli cultivars. The hybrid cultivars, Crusader, Green Duke and Bravo, showed a higher level of resistance to symphylans than the cultivars Waltham and Spartan. Results indicated that tolerance was the major mechanism contributing to symphylan resistance in the cultivars. Of the cultivars studied, Crusader was the most tolerant followed by Green Duke, Bravo, Waltham and Spartan. There were no significant differences between the cultivars with respect to preference and antibiosis. Field experiments confirmed that there were differences in resistance between the cultivars to symphylan injury.
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