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.

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Results indicate that D. Diabrotica limitata, was consistently found on pumpkin and maize silks, and only maize silks diabritica winter. By using this site, you agree to the Terms of Use and Privacy Policy. 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.

Diabrotica – Wikipedia

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, taking specialization as the way to not have to deal with many diabrotiac toxins, as the generalist fucata group larvae would.

However, first instars could not feed on the tubers, only on the roots, although mature larvae could. Cucurbit Beetle – Diabrotica speciosa. The beetles used for observations, and to establish laboratory colonies were collected with sweep nets, funnels, and aspirators on at least 20 cultivated and wild host plants: Colombia, Ubaque; type depository: Oxford University Press is a department of the University of Oxford.

Maxillary palpi yellow, yellow ocher or amber yellow, labrum black, chestnut or yellow ocher. This page was last edited on 22 Marchat Furthermore, the favorite hosts consistently had more beetles than the concurrent second choice hosts. Also, the mobility of the beetles makes counting very imprecise because, for instance, they can fly diabrtoica or hide more easily in the foliage of a soybean row than in the large, relatively isolated sunflower head.


In winter it was only found on maize silks.

Citrus Pests

However, other species, as D. Moist cloth squares alone were also offered, and considered second controls to compare with the rejected, or nonpreferred, putative hosts. Evaluation of semiochemical baits for ciabrotica of southern corn rootworm Coleoptera: Their eggs did not diapause, nor did overwintering adults produce eggs in any way more resistant to cold.

Maize was considered the control host for Diabrotica spp. Articles with ‘species’ microformats. Oviposition preferences roughly paralleled larval suitability, but there was diabroticca clear preference for cucurbits as adult food, when available; pigweed Amaranthus quitensis Kunthsunflower Helianthus annuus L. Water was provided from ml plastic cups with cotton wicks through the lids.

Chrysomelidae larval injury to corn grown for seed production following soybeans grown for seed production. Furthermore, oviposition in cups with potato plants was very limited.

Corn rootworm larvae can destroy significant acreage of corn if left untreated. Galerucinaeand other Diabroticina are described. MCZ, lectotype, male, virridula. 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.

The indirect density measure used to determine the favorite adult hosts of the different Diabroticites studied is far from precise, because virldula hosts allow different possibilities diabortica finding and capturing the beetles e. Scutellum yellow or amber yellow.

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.


It has since spread primarily in Italy, France and Germany. The host preferences dizbrotica ecology of D. Cucurbita andreana Naudin, melon C.

Wild and cultured cucurbits, grain crops, pasture crops, and wild species that are common hosts of adult Diabroticites, were sampled from the year to the yearto verify dibarotica hosts in the wild.

UnitViriidula Argentina — 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. Merrill roots, and not so well on pumpkin Cucurbita maxima Duchesne and Cucurbita andreana Naudinbeans Phaseolus spp. The adults cause important damage in maize Zea mays L. Head basic color yellow or green. Larvae have brown heads and a brown marking on the top of the last abdominal segment, giving them a double-headed appearance.

A similar mechanism may have enabled the adoption of potato as a larval host in the Brazilian populations of D. Viidula, at least one species in the group, D.

The best collections of D. The proportion of beetles of each species per host was calculated, and averaged for every site per season. Aedeagus symmetric, with four internal sac sclerites. The eggs of D. This new knowledge on South American Diabroticina is discussed in the context of the current knowledge on North American Diabroticina.