Abstract. The reproductive biology, and larval and adult host range of Diabrotica speciosa (Germar), Diabrotica viridula (F.), Acalymma spp. (Coleoptera: Chrys. Diabrotica viridula. Alexander Derunkov. rootworm beetle. Diabrotica viridula. Alexander Derunkov. rootworm beetle. Diabrotica viridula. Alexander Derunkov. FAMILIA CHRYSOMELIDAE Latreille, SUBFAMILIA GALERUCINAE Latreille, TRIBU Luperini Gistel, Diabrotica viridula Fabricius.
|Published (Last):||23 February 2012|
|PDF File Size:||14.89 Mb|
|ePub File Size:||3.85 Mb|
|Price:||Free* [*Free Regsitration Required]|
When any chrysomelid larvae were found, they were placed in a maize seedling culture, and transported to the laboratory for identification. Laboratory oviposition and larval development tests on several hosts, provided the basis to construct a table of putative hosts, and general reproductive traits related to two species groups of Diabrotica virgifera and fucata.
Development of laboratory reared D.
Corn Zea mays L. Diabrotic data sheets on quarantine pests Diabrotica speciosa. The reddish coloration at the base of the elytra usually allows distinguishing D.
Survival of eggs of D. Western corn rootworm adults are yellowish with a black stripe on each wing cover.
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 virldula species had more beetles feeding on it. In other projects Wikimedia Commons Wikispecies.
Corn rootworms are one of the most economically significant consumers of maize in the United States.
Biological traits universal for the North American species of vieidula virgifera group were not found in the species of that group which we studied, D. Free flight of western corn rootworm Coleoptera: Because of the lack of sufficient field beetles, not every host chosen could be tested on all the species, only the diahrotica reared at the laboratory.
The viriddula stage is white and has the basic shape of the adult. The plants were pulled or dug up, and the roots, and the soil surrounding the roots were shaken onto a white canvas, and visually inspected. Chrysomelidae larval injury to corn grown for seed production following soybeans grown for seed production.
Diabrotica – Wikipedia
Retrieved from ” https: The host preferences and ecology of D. Receive exclusive offers and updates from Oxford Academic. The adult feeding hosts were compared, among species, and within species in different seasons. Adults like to feed on pollen-rich flowers such as cucurbits, thistle, and sunflower.
Chrysomelidae to corn and soybean plants in a walk-in wind tunnel. BMNH, lectotype, male, verified. Larvae have three pairs of legs, but these are not usually visible without magnification. However, because not all the hosts were present at each collection site, the average proportions do not necessarily sum 1. It has since spread primarily in Italy, France and Germany. Moist cloth squares alone were also offered, and considered second controls to compare with the rejected, or nonpreferred, putative hosts.
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. However, first instars could not feed on the tubers, only on the roots, although mature larvae could.
In an experiment where seedlings of the favorite hosts of D.
The impact of corn rootworm protected biotechnology traits in the United States. Species such as Acalymma albidovittata BalyAcalymma bivittula Kirschand Acalymma bruchii Bowditchoften reach very high populations on cucurbit cultures, causing significant damage to flowers, foliage, and young fruit unpublished data.
Reinvestigation of host location by western corn rootworm larvae Coleoptera: Of these, the genus Diabrotica Chevrolat includes the greatest number of pest species, including some of the most important row crop and vegetable pests of the Americas, be it the foliage, fruit- or flower-feeding adults, or the root-feeding larvae.
There are official reports that D.
There was a problem providing the content you requested
Diapause in the nearctic species of the virgifera group of Diabrotica: 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.
These results diabrotiva clear differences in feeding and oviposition host choices for some species: Diaboticatwo species of South American pest diabrtica.
BMNH, lectotype, female, verified. In the subtropical environments of D. Diabrotica speciosaDiabrotica viridulaAcalymma spphost rangehost shifts. 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.
The favorite adult hosts of D. Elytral epipleura completely yellow or completely green. The diapausing eggs of the North American virgifera pest species, however, result in a virtually permanent egg bank, that makes the population levels of each season less susceptible to weather fluctuations. However, the lack of egg diapause, makes the population levels of South American pest Diabroticites of a given season wholly dependent on the presence of adult females, and the survival of the recent egg bank.
The North American species of this group are apparently without exception uni- or semivoltine, oligophagous, and possess drought or cold resistant diapausing eggs KrysanBranson et al. Colombia, Muzo; type depository: The other species collected were also offered a meridic diet, but they survived better on squash slices and seedlings unpublished data.
However, none of these viruses are reported to infect Citrus spp. At least species in 24 families were examined in southern South America, and found to host feeding adult beetles at least once Table 1. This unspecific behavior, would be compensated by the 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 viridula Fabricius
Close mobile search navigation Article navigation. In preliminary multiple-choice experiments, where several putative hosts were offered simultaneously, oviposition was greatly reduced, and results were inconclusive unpublished data. Chrysomelidae naregiao de Pelotas, RS.