21529147
not annotated - annotated - LINNAEUS only
Growth inhibition of Beauveria bassiana by bacteria isolated from the cuticular surface of the corn leafhopper, Dalbulus maidis and the planthopper, Delphacodes kuscheli, two important vectors of maize pathogens.
The phytosanitary importance of the corn leafhopper, Dalbulus maidis (De Long and Wolcott) (Hemiptera: Cicadellidae) and the planthopper, Delphacodes kuscheli Fennah (Hemiptera: Delphacidae) lies in their ability to transmit phloem-associated plant pathogens, mainly viruses and mollicutes, and to cause considerable mechanical damage to corn plants during feeding and oviposition. Fungi, particularly some members of the Ascomycota, are likely candidates for biocontrol agents against these insect pests, but several studies revealed their failure to invade the insect cuticle possibly because of the presence of inhibitory compounds such as phenols, quinones, and lipids and also by the antibiosis effect of the microbiota living on the cuticular surface of the host. The present work aims to understand interactions between the entomopathogenic fungus Beauveria bassiana (Balsamao-Crivelli) Vuillemin (Hypocreales: Cordycipitaceae) and bacterial antagonists isolated from the cuticular surface of D. maidis and D. kuscheli. A total of 155 bacterial isolates were recovered from the insect's cuticle and tested against B. bassiana. Ninety-one out of 155 strains inhibited the growth of B. bassiana. Bacterial strains isolated from D. maidis were significantly more antagonistic against B. bassiana than those isolates from D. kuscheli. Among the most effective antagonistic strains, six isolates of Bacillus thuringiensis Berliner (Bacillales: Bacillaeae (after B. subtilis)), one isolate of B. mycoides Flugge, eight isolates of B. megaterium de Bary, five isolates of B.pumilus Meyer and Gottheil, one isolate of B. licheniformis (Weigmann) Chester, and four isolates of B. subtilis (Ehrenberg) Cohn were identified.
Ann file
T1 Species 21 39 Beauveria bassiana
N1 Reference T1 Taxonomy:176275
T2 Species 95 110 corn leafhopper
N2 Reference T2 Taxonomy:74065
T3 Species 112 127 Dalbulus maidis
N3 Reference T3 Taxonomy:74065
T4 Species 149 169 Delphacodes kuscheli
N4 Reference T4 Taxonomy:1032455
T5 Species 251 266 corn leafhopper
T6 Species 1070 1088 Beauveria bassiana
N6 Reference T6 Taxonomy:176275
T7 Species 1215 1224 D. maidis
N7 Reference T7 Taxonomy:74065
T8 Species 1229 1240 D. kuscheli
N8 Reference T8 Taxonomy:1032455
T9 Species 1336 1347 B. bassiana
N9 Reference T9 Taxonomy:176275
T10 Species 1403 1414 B. bassiana
N10 Reference T10 Taxonomy:176275
T11 Species 1448 1457 D. maidis
N11 Reference T11 Taxonomy:74065
T12 Species 1503 1514 B. bassiana
N12 Reference T12 Taxonomy:176275
T13 Species 1540 1551 D. kuscheli
N13 Reference T13 Taxonomy:1032455
T14 Species 1616 1638 Bacillus thuringiensis
N14 Reference T14 Taxonomy:1428
T15 Species 1679 1690 B. subtilis
N15 Reference T15 Taxonomy:1423
T16 Species 1709 1720 B. mycoides
N16 Reference T16 Taxonomy:1405
T17 Species 1747 1760 B. megaterium
N17 Reference T17 Taxonomy:1404
T18 Species 1787 1796 B.pumilus
N18 Reference T18 Taxonomy:1408
T19 Species 1832 1848 B. licheniformis
N19 Reference T19 Taxonomy:1402
T20 Species 1890 1901 B. subtilis
N20 Reference T20 Taxonomy:1423
T21 Species 268 283 Dalbulus maidis
T22 Species 353 373 Delphacodes kuscheli
T23 Species 196 201 maize
T24 Species 553 557 corn
N21 Reference T24 Taxonomy:4577 Zea mays
N22 Reference T22 Taxonomy:1032455 Delphacodes kuscheli
N23 Reference T21 Taxonomy:74065 Dalbulus maidis
N5 Reference T5 Taxonomy:74065 Dalbulus maidis