Preferred Scientific Name; Diabrotica speciosa. Preferred Common Name; cucurbit beetle. Taxonomic Tree; Domain: Eukaryota; Kingdom. Diabrotica speciosa speciosa Germar as Galeruca prasina Dejean (replacement name for speciosa Germar ). Diabrotica speciosa (Germar) and Diabrotica viridula F. (Coleoptera: Chrysomelidae) are the two most abundant species of the genus in South America, and.
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Fact Sheet: Cucurbit beetle | Citrus Pests
Pronotum paris green or green, subquadrate, bifoveate, with small round foveae, not shagreened. Laboratory test on host breadth of Acalymma and Diabrotica spp. Caracterizacion del tercer estadio larval de Diabrotica speciosa.
Insect pests of sweet passion fruit in Distrito Federal. This is likely the situation in Argentina with D. Antennae filiformbi- or tricolored, antennomere 1 pale olivine, antennomeres yellow, upper sides darkened, antennomeres cinnamon brown.
No larval survival was observed on the Dicotyledonae tested. Because of the lack of sufficient field beetles, not every host chosen could be tested on all the species, specjosa the ones reared at the laboratory.
Incidence of parasitoids and pathogens in adults of Diabrotica speciosa Germ. Multivoltinism and lack of egg diapause was demonstrated for the three species, and field data suggest other South American species present the same traits.
Other species showed varying degrees of preference for oviposition and feeding, but in general, cucurbits were the preferred adult feeding hosts, followed by several wild plants, and maize the preferred oviposition host. Potato plants were tested in ml containers, to accommodate the germinated tubers. View large Download slide.
diabrotica beetle Diabrotica speciosa speciosa (Germar)
Survey of insects associated with sweet potato, Ipomoea batatas, using water traps, in Ituporanga, Santa Catarina. However, all these studies deal with North American Diabroticina, but their extension to South American species is yet to be confirmed.
Chrysomelidaein central Mexico. Our current knowledge indicates we are dealing with a complex of vicariant species in South and Specosa America, that share reproductive and feeding traits, and affect the same crops. The apparent host shift observed in winter for D. In the southernmost homelands of D. Clear preferences were observed in the number and regularity of eggs laid on the different hosts.
Adult Diabroticites of most of the species studied are primarily pollen feeders, and pharmacophagous on bitter cucurbits Nishida and Fukamiand they seem to follow down a series of hosts as the favorite ones go missing in the field: Diabrotica speciosa belongs to the fucata group of Diabrotica, to which the North American banded, spotted or southern corn rootwormand western spotted cucumber beetles belong Diabrotica balteata LeConte, Diabrotica undecimpunctata howardi Barber, and Diabrotica u.
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Reinvestigation of host location by western corn rootworm larvae Coleoptera: Adults, both field and laboratory reared beetles, were kept in cages: Eastern Colombia; type depository: So the adult feeding hosts of D. When several references are cited, they may give conflicting information on the status.
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Passo Fundo, RS, Brazil: Feeding and oviposition behavior and life cycle strategies of Diabrotica: This diabrotida, beyond the fact of neutralizing crop rotation as an effective control method, gives us an example of how unrelated oviposition and adult hosts, could operate adaptive advantages: Methods for the Study of Pest Diabrotica.
In South America, the most common and problematic species is Di-abrotica speciosa Germar. The collection data of this species Table 3show diabrottica polyphagous species, but more closely associated to maize than D.
European and Mediterranean Plant Protection Organization.
Ds, Diabrotica speciosa; Dv, D. The larvae were incubated on seedlings and sprouted tubers in the case of potatoes, C. This unspecific behavior, would be compensated by sleciosa narrow oviposition host range observed so far in the species of the virgifera group Branson and Krysana trait of unquestionable adaptive utility in a natural environment, where adequate hosts may grow disseminated.
Diabrotica speciosaDiabrotica viridulaAcalymma spphost rangehost shifts. Diabrotica speciosa speciosa is similar to D.