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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Furthermore, oviposition in cups with potato plants was very limited. They may also transmit bacterial wilt in cucurbits unpublished data. Laboratory test on host breadth of Acalymma and Diabrotica spp.
The indirect density measure used to determine the favorite adult hosts of the different Diabroticites studied is far from precise, because different hosts allow different possibilities of finding and capturing the beetles e. Eastern Colombia; type depository: Corn rootworm rearing methodologies. 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: Almost exactly the reverse of the oviposition preference.
cucurbit beetle, Diabrotica speciosa Coleoptera: Chrysomelidae
Furthermore, the larvae seem to be unable to choose a suitable host other than by taste Branson and KrysanBernclau and Bjostad The adult feeding hosts were compared, among species, and within species in different seasons.
The cucurbit beetle is reported to semi-persistently vector Passionfruit yellow mosaic virusMimosa mosaic virusand Purple granadilla mosaic virus.
Crop life table studies of the pests of beans Phaseolus vulgaris L. The timing diabrotia sowing the eggs was dependent on the host plant. 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.
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So it gives a rough but representative estimation of the favorite, mediumly favored, and little visited hosts for each common Diabroticites species in different seasons. A similar mechanism may have enabled the adoption of potato as a larval host in the Brazilian populations of D.
Chrysanthemum beetle; San Antonio beetle Spanish: Although Diabroticites will oviposit on several moist substrates, such as sand, soil, cotton wool, and paper, the presence of fresh food, and especially the larval host, will greatly stimulate oviposition Branson et al.
This, however, would agree with the more northerly known distribution of the species. The Colombian species of the genus Diabrotica, with descriptions of those hitherto uncharacterized.
In this sense, cool weather may be regarded more as a preservation benefit until suitable hosts appear, than a hazard. Incidencia de parasitoides e patogenos em adultos de Diabrotica speciosa Germ. Host plant breadth and importance of cu-curbitacins for the larvae of Diabroticites Galerucinae: These Diabroticina are pests of several crops in South and Central America. Anais da Sociedade Entomologica do Brasil, 18 2: The production of diapausing eggs was also tested for D.
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Diabrotica speciosa — Wikipédia
Chrysomelidae in beans, in Goias. Insect pests of sweet passion fruit in Distrito Federal. The results in Table 2indicate the favorite hosts of D. Finally, the different collection method required sweep nets in a row crop and wild plants, aspirators in vegetables and cucurbits, funnels in sunflowercan hardly be compared.
Also, the mobility of the beetles makes counting very imprecise because, for instance, they can fly away or hide more easily in the foliage of a soybean row than in the large, relatively isolated sunflower head. Passo Fundo, RS, Brazil: Distribution Maps of Plant Pests, No. Biological traits universal for the North American species of the virgifera group were not found in the species of that group which we studied, D.
Diabrotica speciosa speciosa is similar to D. Colonia Tovar, Venezuela; type depository: More information about modern web browsers can be found at http: In preliminary multiple-choice experiments, where several putative hosts were offered simultaneously, oviposition was greatly reduced, and results were inconclusive unpublished data.
Differences and similarities are discussed in connection with their pestiferous status, and their potential for adaptation to new hosts. Moist cloth squares alone were also offered, and considered second controls to compare with the rejected, or nonpreferred, putative hosts. In the same laboratory conditions, D.
Water was provided from ml plastic cups with cotton wicks through the lids. Finally, — eggs, depending on the number of eggs available, were pipetted from a beaker, and spread on the culture.
Other species showed varying degrees of preference for oviposition and feeding, but in riabrotica, cucurbits were the preferred adult feeding hosts, followed by several wild plants, and maize the preferred oviposition host. Furthermore, the favorite hosts consistently had more beetles than the concurrent second choice hosts.
A partial list includes:.