<i>Anthracocystis panici-leucophaei</i>: A Potential Biological Control Agent for the Grassy Weed <i>Digitaria insularis</i>
<i>Anthracocystis panici-leucophaei</i>, causal agent of smut on <i>Digitaria insularis</i> (sourgrass), was evaluated as a biological control agent for this weed. Two types of inocula (teliospore and sporidia) were tested to assess its infectivity. The effects of teliospore...
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| Main Authors: | , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2024-12-01
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| Series: | Agronomy |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2073-4395/14/12/2926 |
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| Summary: | <i>Anthracocystis panici-leucophaei</i>, causal agent of smut on <i>Digitaria insularis</i> (sourgrass), was evaluated as a biological control agent for this weed. Two types of inocula (teliospore and sporidia) were tested to assess its infectivity. The effects of teliospore and sporidia inoculations at different phenological stages of sourgrass were compared, as well as the potential of sporidia and teliospores in post-emergence sourgrass management. Virulence tests were conducted with the isolates obtained from <i>D. insularis</i> and evaluation of specificity of <i>A. panici-leucophaei</i>. Both teliospores and sporidia of <i>A. panici-leucophaei</i> are infective to <i>D. insularis</i> in three different phenological stages. Newly emerged plants with one pair of leaves are more sensitive to <i>A. panici-leucophaei</i>. Infection by <i>A. panici-leucophaei</i> inhibits the growth of sourgrass, decreasing several physiological parameters of <i>D. insularis</i> plants. The fungus produces systematic infection of sourgrass plants and may induce the formation of sori in a significant proportion of the plant panicles, partly castrating those plants. Among sixteen <i>A. panici-peucophaei</i> isolates tested, isolate 46 was the most virulent and inhibited the growth of sourgrass plants, and thus appears to have good potential as a biological control agent to be deployed against sourgrass. <i>A. panici-leucophaei</i> was demonstrated to be specific to <i>D. insularis</i>. |
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| ISSN: | 2073-4395 |