Skip to main content
Entomology 2024 Main banner
Bayer Crop Science
Icon Legend
 
Oral Presentation
Oral Presentation
Poster Display
Poster Display
Student Competition
Student Competition
Ticketed Event
Ticketed Event
Back

Poster Display

Plant-Insect Ecosystems

Poster: P-IE, Resistance

D3496: Biological parameters of Bemisia tabaci MEAM1 and MED in soybean genotypes with different levels of total flavonoids

Tuesday, November 12, 2024
9:00 AM – 5:00 PM MST
Location: Phoenix Convention Center, Exhibit Hall 6, PCC
Poster Display

Cryptic species of Bemisia tabaci MEAM1 (Middle East Asia Minor 1) and MED (Mediterranean) are invasive pests in soybean crops in Brazil. The use of resistant plants can help to reduce B. tabaci populations in the field. Thus, the objective of this study was to evaluate biological parameters of B. tabaci MEAM1 and MED on 35 soybean genotypes and to analyze the levels of total flavonoids, possibly associated with the expression of plant resistance. The incubation period, nymphal period, egg-adult development period, and nymphal viability of both species were evaluated. Chemical analyses were performed to determine total flavonoids in all genotypes. The genotypes TMG 1180 RR, Conquista, 99R09, KS 4202, and BRB 15-237.527 prolonged the nymphal and egg-adult development periods of MEAM1. For MED, the egg-adult period duration was longer in the genotypes 50I52 RSF IPRO, TMG 1288 RR, and TMG 2375 IPRO. The genotypes IAC 74-2832, Dowling, BRS 391, TMG 2375 IPRO, FTS Campo Mourão RR, and IAC 24 caused a greater reduction in the nymphal viability of MEAM1. On the other hand, the genotypes TMG 2375 IPRO, TMG 1288 RR, and BRS 1003 IPRO caused higher nymph mortality of MED. There was a significant negative correlation between total flavonoids and the nymphal viability of MEAM1. This study revealed sources of resistance for B. tabaci MEAM1 and MED. Moreover, our results suggest that total flavonoids may be related to soybean resistance to B. tabaci MEAM1, but not to MED.