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Antibiosis to Spittlebugs (Homoptera: Cercopidae) in Accessions of Brachiaria spp.

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Title Antibiosis to Spittlebugs (Homoptera: Cercopidae) in Accessions of Brachiaria spp.
 
Creator Lapointe, Stephen
Serrano, Miguel S.
Arango, Guillermo L.
Sotelo, Guillermo
Córdoba, Freddy
 
Subject BRACHIARIA
ANTIBIOSIS
INSECTA
 
Description CIAT- Outstanding Research Publication Award (ORPA) - 1992
High levels of antibiotic resistance to the cercopid Aeneolamia varia (F.) were identified in accessions of the forage grass Brachiaria by means of a glasshouse bioassay. Emergence of adults from pots of Brachiaria spp. infested with eggs of A. varia ranged from 55 to 83% and 56 to 80% on susceptible B. decumbens Stapf cv. Basilisk and B. dictyoneura (Fig. & De Not.) Stapf cv. Llanero, respectively, compared with 3–33% on the resistant B. brizantha (A. Rich.) Stapf cv. Marandu. Eleven accessions from six species of Brachiaria were identified as being at least as resistant as ‘Marandu’ based on adult emergence. Two accessions of B. jubata (Fig. & De Not.) Stapf (CIAT 16531 and CIAT 16203) were highly antibiotic. When reared on B. jubata CIAT 16531, nymphs that survived until the fourth or fifth instar subsequently died during molt after apolysis was initiated but before ecdysis could be completed, and were malformed. All nymphs that died during final molt were in the pharate condition before ecdysis began or were unable to complete ecdysis. Survival of nymphs beyond the third instar on B. jubata CIAT 16203 was very low. When late instars were transferred from ‘Basilisk’ to B. jubata CIAT 16203, survival was reduced compared with nymphs transferred to ‘Llanero’, and deformations and molt disruption were observed. Molt disruption is postulated to be the mechanism of resistance in B. jubata CIAT 16531 and 16203. Adult females produced less excreta when caged on the resistant accessions B. jubata CIAT 16531 and ‘Marandu’ compared with the susceptible ‘Basilisk’ and ‘Llanero’.
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Date 2019-10-08T18:59:40Z
2019-10-08T18:59:40Z
1992
 
Type Journal Article
 
Identifier Lapointe, Stephen; Serrano, Miguel S.; Arango, Guillermo L. ; Sotelo, Guillermo; Córdoba, Freddy (1992). Antibiosis to Spittlebugs (Homoptera: Cercopidae) in Acccessions of Brachiaria spp. Journal of Economic Entomology, 85(4-1): 1485-1490.
https://hdl.handle.net/10568/103997
 
Language en
 
Rights Copyrighted; all rights reserved
 
Format 85(4-1): 1485-1490.
 
Publisher Oxford Academic
 
Source Entomological Society of America