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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rootworm beetle, Diabrotica viridula (Coleoptera: Chrysomelidae) –
These Diabroticina are pests of several crops in South and Central America. Because of the lack of ciabrotica field beetles, not every host chosen could be tested on all the species, only the ones reared at the laboratory.
Wikispecies has information related to Diabrotica. In this sense, cool weather may be regarded more as a preservation benefit until suitable hosts appear, than a hazard. Laboratory rearing and vital statistics of Diabrotica speciosa Germar and Diabrotica viridula F.
Differences and similarities are discussed in connection with their pestiferous status, and their potential for adaptation to new hosts. Diabrotica viridula virgifera grouppreferred maize as adult and larval food, and for oviposition. 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: 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.
These results reflect clear differences in feeding and oviposition host choices for some species: Maize was considered the control host for Diabrotica spp.
Diabrotica viridula Fabricius
Feed mainly diabrotcia vegetables, but are particularly associated with Cucurbitaceae. 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 different toxins, as the generalist fucata group larvae would.
Diabrotica is a widespread genus of beetlessometimes referred to as cucumber beetles or corn rootwormsin the family Chrysomelidae. Merrill roots, and not so well on pumpkin Cucurbita maxima Duchesne and Cucurbita andreana Naudinbeans Phaseolus spp.
Elytral surface with five distinct sinuate sulci, strongest behind the humeral callus and extending beyond the middle, humeral diabrotjca distinct. A similar situation was reported by Barbercheck et al.
Diabrotica viridula, of tropical and subtropical distribution, was found more on maize mainly silks, but also tassels than cucurbits, as compared with D.
In tropical areas, the cucurbit beetle reproduces continuously. Eggs are oviposited on the soil close to a host plant. The sole South American species of this group considered a pest is Diabrotica viridula F. Elytral epipleura completely yellow or completely green. Reinvestigation of host location by western corn rootworm larvae Coleoptera: Population characteristics of a western corn rootworm Coleoptera: EPPO Pest risk assessment area: Diabrotica balteata Diabrotica barberi Diabrotica beniensis Diabrotica cristata Diabrotica curvipustulata Diabrotica dissimilis Diabrotica elegantula Diabrotica emorsitans Diabrotica graminea Diabrotica hispanolae Diabrotica lemniscata Diabrotica linsleyi Diabrotica longicornis Diabrotica milleri Diabrotica nummularis Diabrotica occlusa Diabrotica porracea Diabrotica scutellata Diabrotica speciosa Diabrotica tibialis Diabrotica trifasciata Diabrotica undecimpunctata Diabrotica virgifera Diabrotica viridula.
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Aedeagus symmetric, with four internal sac sclerites. They go through three larval instars, pupate in the soil and emerge as adults in July and August, with one generation per year. No larval survival was observed on the Dicotyledonae tested.
They also reported mass attacks on squash seedlings early in the growing season. A minimum of five replications were tried for each species on each putative host.
The evidence of unspecific host selection by the larvae, sudden switch to new hosts, as D.
Citing articles via Web of Science Our current knowledge indicates we are dealing with a complex of vicariant species in South and North America, that share reproductive and feeding traits, and affect the same crops. The other species collected were also offered a meridic diet, but they survived better on squash slices and seedlings unpublished data.
Furthermore, the larvae seem to be unable to choose a suitable host other than by taste Branson and KrysanBernclau and Bjostad The results in Table 2indicate the favorite hosts of D. However, because not all the hosts were present at each collection site, the average proportions do not necessarily sum 1.