Insects (2020) 11 (7 - 421)

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Guillermo Cabrera Walsh, Crébio J. Avila, Nora Cabrera, Dori E. Nava, Alexandre de Sene Pinto and Donald C. Weber (2020)
Biology and management of pest Diabrotica species in South America
Insects 11 (7 - 421)
Abstract: The genus Diabrotica has over 400 described species, the majority of them neotropical. However, only three species of neotropical Diabrotica are considered agricultural pests: D. speciosa, D. balteata, and D. viridula. D. speciosa and D. balteata are polyphagous both as adults and during the larval stage. D. viridula are stenophagous during the larval stage, feeding essentially on maize roots, and polyphagous as adults. The larvae of the three species are pests on maize, but D. speciosa larvae also feed on potatoes and peanuts, while D. balteata larvae feed on beans and peanuts. None of these species express a winter/dry season egg diapause, displaying instead several continuous, latitude-mediated generations per year. This hinders the use of crop rotation as a management tool, although early planting can help in the temperate regions of the distribution of D. speciosa. The parasitoids of adults, Celatoria bosqi and Centistes gasseni, do not exert much control on Diabrotica populations, or show potential for inundative biocontrol plans. Management options are limited to insecticide applications and Bt genetically modified (GM) maize. Other techniques that show promise are products using Beauveria bassiana and Heterorhabditis bacteriophora, semiochemical attractants for monitoring purposes or as toxic baits, and plant resistance.
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Database assignments for author(s): Dori Edson Nava, Donald C. Weber

Research topic(s) for pests/diseases/weeds:
control - general
biocontrol - natural enemies
Research topic(s) for beneficials or antagonists:

Pest and/or beneficial records:

Beneficial Pest/Disease/Weed Crop/Product Country Quarant.
Diabrotica balteata Beans (Phaseolus) Colombia
Diabrotica speciosa Maize/corn (Zea mays) Brazil (south)
Diabrotica speciosa Potato (Solanum tuberosum) Argentina
Diabrotica viridula Maize/corn (Zea mays) Brazil (south)
Beauveria bassiana (entomopathogen) Diabrotica speciosa
Steinernema glaseri/Xenorhabdus poinarii (entomopathogen) Diabrotica speciosa
Centistes gasseni (parasitoid) Diabrotica speciosa
Celatoria bosqi (parasitoid) Diabrotica speciosa