Old World St. Augustinegrasses Resistant to the Southern Chinch Bug (Heteroptera: Lygaeidae)

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Several introduced clones of St. Augustine grass, Stenotaphrum secunda tum (Walt.) Kuntze and S. dimidiatum (L.) Brongn., from the Republic of South Africa, Tanzania, Zimbabwe,and Malagasy Republic exhibited high levels of resistance (antibiosis > 'Floratam', a resistant cultivar) to the southern chinch bug, Blissus insularis Barber. Resistance of 37 Stenotaphrum clones was evaluated on the basis of mortality of field-collected adult clinch bugs confined for 7 days with grass stolon terminals in plastic bags. Only polyploid St. Augustnegrasses were antibIOtic to B. insularis. Resistance was found in both Old and New World clones, but not all polyploid St. Augustine grass clones were resistant to the southern chinch bug.

Document Type: Research Article

Publication date: August 1, 1986

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