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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Fact Sheet: Cucurbit beetle | Citrus Pests

For corn, squash, and beans, eggs, and seeds were sown at the same time, because the root mat was adequately developed by the time the eggs hatched Cabrera Walsh The eggs of D. 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.

Cucurbita andreana Naudin, melon C. 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. Neither all the plant species, nor all the beetle species could be tested at the same time for reasons of space, egg or host plant availability.

This new knowledge on South American Diabroticina is discussed in the context of the current knowledge on North American Diabroticina. Population characteristics of a western corn rootworm Coleoptera: However, none of these viruses are reported to infect Citrus spp.

Clear preferences were observed in the number and regularity of eggs laid on the different hosts.

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reach very high populations on cucurbit cultures, causing significant damage to flowers, foliage, and young fruit unpublished data. Larvae have three pairs of legs, but these are not usually visible without magnification. They go through three larval daibrotica, pupate in the soil and emerge as adults in July and August, with one generation per year.

Chrysomelidae naregiao de Pelotas, RS. The cucurbit beetle is cold-tolerant and overwinters as an adult. Maize was considered the control host for Diabrotica spp.

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The reddish coloration at the base of the elytra usually allows distinguishing D. The larvae were incubated on seedlings and sprouted tubers in the case of potatoes, C.

Oxford University Press is a department of the University of Oxford. Plants with zero larval survival were not tested again, the others had 10 more repetitions. viridyla

A minimum of five replications were tried for each species on each putative host. MfN, lectotype, male, verified. Although the effect of the larvae on the crops they feed on has not been evaluated rigorously, there is sound evidence that they seriously damage maize, potatoes Solanum tuberosum L.

Citrus Pests

Development of laboratory reared D. This novelty, beyond the fact of neutralizing crop rotation as an effective control method, gives us an example of how unrelated oviposition and adult hosts, could operate adaptive advantages: Free flight of western corn rootworm Coleoptera: 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.

Also, data on adult feeding hosts, and host range shifts related to the season, were gathered through direct observation in the diabrotkca. The larvae are yellowish and wormlike. Cucurbit Beetle – Diabrotica speciosa.

Radin and Drummondreported that no adjustment could be found to a degree-day model diabrotkca the striped cucumber beetle in its temperate distribution.

Ds, Diabrotica speciosa; Dv, D. The average proportion of beetles collected on each host per season was taken as a measure of host preference. Feeding tests confirmed the field observations, as to the favorite adult feeding hosts, and in some cases, the marked difference between feeding vuridula oviposition virirula Tables 2—4.

Colombia, Muzo; type depository: