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.

Author: Tojataur Gut
Country: Monaco
Language: English (Spanish)
Genre: Medical
Published (Last): 21 January 2011
Pages: 452
PDF File Size: 18.11 Mb
ePub File Size: 1.87 Mb
ISBN: 626-1-76614-437-5
Downloads: 88246
Price: Free* [*Free Regsitration Required]
Uploader: Nakora

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 xiabrotica which plant species had more beetles feeding on it. A minimum of five replications were tried for each species on each putative host.

Chrysomelidae naregiao de Pelotas, RS. 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.

Eastern Colombia; type depository: Population characteristics of a western corn rootworm Coleoptera: In the subtropical environments of D.

Chandler, ; Icuma et al. The container was covered with a plastic lid that had a 4-cm opening covered with a fine mesh.

According to our caged experiments, this species can diabrotic on potato. Chysomelidae in Pelotas, RS. They hide in the crown or rosettes of winter-growing plants. The cucurbit beetle is cold-tolerant and overwinters as an adult. Diapause in the nearctic species of the virgifera group of Diabrotica: Poaceae root pests and finding native resistance in landraces would greatly contribute to maize-breeding programs aimed at controlling this pest. So the adult feeding hosts of D.


Our current knowledge indicates we are dealing with a complex of vicariant species in South and North America, that share reproductive riabrotica feeding traits, and affect the same crops. In this context, the South American virgifera group Diabrotica may have found a more benign climate, where suitable hosts were available most of the year, and overwintering as adults was possible, thus losing these traits, or never developing them.

Larvae complete three instars while feeding on the roots of the host plant and pupate in the soil.

Diabrotica speciosaDiabrotica viridulaAcalymma spphost rangehost shifts. A similar mechanism may have enabled the adoption of potato as a larval host in the Brazilian populations of Daibrotica.

Citrus Pests

In the spring, adults emerge to feed on the host plant. In the same laboratory conditions, D. 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.

Adults, both field and laboratory reared beetles, were kept in cages: For the other plants the eggs were not scattered until an important root mat had formed, which could be between 1 wk and 25 d, according to the species. 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.


When several references are cited, they may give conflicting information on the status. Then 60 seeds, or one sprouted tuber, were buried in the container.

However, the fact is that the South American pest Diabrotica pose different problems to the North American species.

Diabrotica speciosa – Wikipedia

Potato plants were tested in ml containers, to accommodate the germinated tubers. In effect, the levels of both D. Roel AR; Zatarin M, They are more commonly associated with cucurbits, allegedly the ancestral host of the Diabroticina, and, at the same time, more generalists both during the adult and immature stages.

Galerucinaeand other Diabroticina are described. Laboratory test on host breadth dibrotica Acalymma and Diabrotica spp.

Pests of oilseed rape: The other virgifera group species studied, D. Adults like to feed on pollen-rich flowers such as cucurbits, thistle, and sunflower.

Author: admin