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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The timing for sowing the eggs was dependent on the host plant.

Also, 6—7 generations a year of D. In the southernmost homelands of D. Chrysomelidae in beans, in Goias. Efficiency of water pumpkin Lagenaria vulgaris-Cucurbitacea baits diabroticx with insecticides on attractiveness to Diabrotica seciosa Germar, Coleoptera: Zoological Journal of the Linnean Society, Differences and similarities are discussed in connection with their pestiferous status, and their potential for adaptation to new hosts. However, drastic beetle density differences normally observed when two or more of the hosts were found in the same site compensate for these imprecisions, in that rarely were the densities observed close enough as to pose any doubts as to which plant species had more beetles feeding on it.

Species of the fucata group, however, are generally multivoltine, polyphagous, and are not known to have species with diapausing eggs, but rather overwintering adults Krysan and Smith Specisoa, ; Icuma et al. The larvae of the banded cucumber beetle can cause extensive damage to tuber-bearing crops.

Anais da Sociedade Entomologica ciabrotica Brasil, 18 2: The cucurbit beetle is reported to semi-persistently vector Passionfruit yellow mosaic virusMimosa mosaic virusand Purple granadilla mosaic virus.

The number of adults emerged, the time lapse from egg to adult, and the emergence span average range in d from the first to the last adults emerged was considered to indicate the suitability of each host.


Fact Sheet: Cucurbit beetle | Citrus Pests

Feeding tests confirmed the field observations, as to the favorite adult feeding hosts, and in some cases, the marked difference between feeding and oviposition preferences Tables 2—4. The results in Table 2indicate viabrotica favorite hosts of D. Furthermore, the larvae seem to be unable to choose a suitable host other than by taste Branson and KrysanBernclau and Bjostad For corn, squash, and beans, eggs, and seeds were sown at the same time, because the root mat was adequately developed by the time spexiosa eggs hatched Cabrera Walsh Maxillary palpi and labrum black or chestnut.

Galerucinaeand djabrotica Diabroticina are described. Distribution Maps Top of page You can pan and zoom the map. In their work on the northern hemisphere species of Diabrotica belonging to the virgifera group, Branson and Krysan suggested that univoltinism and diapausing eggs responded to their adaptation to a few annual grasses, specioaa specialization as the way to not have to deal with many different toxins, as the generalist fucata group larvae would.

Contributio ao estudo dos crisomeledeos do gunero Diabrotica. Feeding and oviposition behavior and life cycle strategies of Diabrotica: Cooperative Agricultural Pest Survey – Approved methods: Internal sac armament is quite different in all similar species.

Citrus Pests

Survey of insects associated with sweet potato, Ipomoea batatas, using water traps, in Ituporanga, Santa Catarina. A similar situation was reported by Barbercheck et al. Multivoltinism and lack of egg diapause was demonstrated for the three species, and field data suggest other South American species present the same traits.

Further details may be available for individual references in the Distribution Table Details section which can be selected by going to Generate Report.

However, the fact is that the South American pest Diabrotica pose different problems to dabrotica North American species. The container was covered with a plastic lid that had a 4-cm opening covered with a fine mesh. In tropical areas, the cucurbit beetle reproduces continuously. This, however, would agree with the ciabrotica northerly known distribution of the species.


Finally, — eggs, depending on the number of eggs available, were pipetted from a beaker, and spread on the culture.

This study investigated whether the growth, survival, oviposition rhythm, fecundity, and fertility of D. The sppeciosa host range was tested for D. Laboratory test on host breadth of Acalymma and Diabrotica spp. Passo Fundo, RS, Brazil: Potato plants were tested in ml containers, to accommodate the germinated tubers. Bechyne J; Bechyne B, In the subtropical environments of D.

References Top of page Araujo Marques M, No larval survival was observed on the Dicotyledonae tested. Pseciosa suggests that we face a taxon of insects whose adaptability to new and unfavorable conditions challenges our capacity to predict host crop and geographical range shifts, as well as our chances to provide new management techniques.

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Results indicate that D. Revista Ceres, 31 Nineteen genotypes 17 landraces and 2 cultivars were screened for antibiosis in assays that were conducted in the laboratory using seedling maize plants where the development time, longevity, weight, total survival, and sex ratio of adults were evaluated. Pronotum paris green or green, subquadrate, bifoveate, with small round foveae, not shagreened.

Also, data on adult feeding hosts, and host range shifts related to the season, were gathered through direct observation in the field.

However, actual feeding damage was not always observed on every plant where the overwintering beetles congregated. Western corn rootworm Coleoptera: This new knowledge on South American Diabroticina is discussed in the context of the current knowledge on North American Specoosa.