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Intraguild interactions and behavior of Spodoptera frugiperda and Helicoverpa spp. on maize
Author(s) -
Bentivenha José PF,
Montezano Débora G,
Hunt Thomas E,
Baldin Edson LL,
Peterson Julie A,
Victor Vinícius S,
Pannuti Luiz ER,
Vélez Ana M,
PaulaMoraes Silvana V
Publication year - 2017
Publication title -
pest management science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.296
H-Index - 125
eISSN - 1526-4998
pISSN - 1526-498X
DOI - 10.1002/ps.4595
Subject(s) - helicoverpa zea , biology , helicoverpa , noctuidae , spodoptera , pest analysis , lepidoptera genitalia , helicoverpa armigera , larva , guild , intraguild predation , agronomy , ecology , botany , habitat , biochemistry , gene , predation , recombinant dna , predator
BACKGROUND Spodoptera frugiperda (J.E. Smith) (Lepidoptera: Noctuidae) is one of the major pests of maize and is in the same feeding guild as the noctuid pests Helicoverpa zea (Boddie) and Helicoverpa armigera (Hübner), recently reported in South and North America. The intraguild interactions of these species were assessed in laboratory and field conditions by determining the survival of larvae in interaction scenarios with non‐ Bt maize silks and ears. Moreover, a video tracking system was utilized to evaluate behavioral parameters during larval interactions in scenarios with or without food. RESULTS In intraguild interactions, S. frugiperda had greater survival (55–100%) when competing with Helicoverpa spp. in scenarios where larvae were the same instar or when they were larger (fourth versus second) than their competitor. Frequency and time in food of S. frugiperda larvae were negatively influenced by interactions. Larvae of S. frugiperda moved shorter distances (less than 183.03 cm) compared with H. zea . CONCLUSION Overall, S. frugiperda had a competitive advantage over Helicoverpa spp. This study provides significant information regarding noctuid behavior and larval survival during intraguild interactions, which may impact pest prevalence and population dynamics, thereby affecting integrated pest management and insect resistance management of these species in maize. © 2017 Society of Chemical Industry