Fluctuaciones poblacionales de áfidos y de otros artrópodos en el follaje de alfalfa cultivada en la Región Metropolitana

Apablaza, J.; Stevenson, Tomás R

doi:10.7764/rcia.v22i3.852

Cited by 8 publications

(6 citation statements)

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“…A noticeable increase in population levels occurred at the beginning of autumn, possibly related with the generation that spent the winter in diapause, results which coincided with those obtained by Apablaza and Stevenson (1995) who pointed out that the annual population maxima for coccinellids in alfalfa in the Metropolitana Region took place at the end of March.…”

Section: Population Fluctuation Of H Variegatasupporting

confidence: 86%

“…The sampling was carried out periodically every 10 ± 1 day during the spring, summer, and autumn months, and every 20 ± 1 day during the winter months. Each sample consisted in passing 20 times with a standard 30 cm diameter entomological net over the foliage in a 180º range, at a regular pace following the methodology proposed by Metcalf and Luckman (1990) and Apablaza and Stevenson (1995). The sampled area was divided into four 1 ha -1 quadrants, numbered clockwise to facilitate sampling.…”

Section: Field Workmentioning

confidence: 99%

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Life, Seasonal Cycles, and Population Fluctuation of Hippodamia variegata (Goeze) (Coleoptera: Coccinellidae), in the Central Plain of La Araucanía Region, Chile

Rebolledo

Sheriff

Parra

et al. 2009

Chilean J. Agric. Res.

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This study was performed on an alfalfa crop located on the central plain of La Araucanía Region, Chile and in the Laboratorio de Entomología Aplicada de la Facultad de Ciencias Agropecuarias y Forestales at the Universidad de La Frontera. Certain aspects of the biology of Hippodamia variegata (Goeze) (Coleoptera: Coccinellidae) were determined, more specifically in relation to its life cycle, seasonality, and population fluctuation. It was established that this coccinellid requires 190.32 ± 10.2 degree-days to complete a generation under laboratory conditions. This information along with the field samplings made it possible to calculate that H. variegata completes four generations per season in the alfalfa crop (Medicago sativa L.).

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Section: Population Fluctuation Of H Variegatasupporting

confidence: 86%

Section: Field Workmentioning

confidence: 99%

Life, Seasonal Cycles, and Population Fluctuation of Hippodamia variegata (Goeze) (Coleoptera: Coccinellidae), in the Central Plain of La Araucanía Region, Chile

Rebolledo

Sheriff

Parra

et al. 2009

Chilean J. Agric. Res.

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“…Three species dominated: Aphis craccivora Koch, Acyrthosiphum pisum (Harris) and Therioaphis trifolii (Monell), all of them reported as common species attacking this crop in Central Chile (Apablaza and Stevenson, 1995). The total abundance of aphids in alfalfa fields was not affected by the type of edge (F (4,5) = 0.51, P = 0.73), but in spring, they tended to be less abundant in the alfalfa fields adjacent to F-B-P (F (8,10) = 2.90, P = 0.059; Figure 4).…”

Section: Wementioning

confidence: 99%

“…Alfalfa crops (Medicago sativa Linnaeus) allow the development of a variety of insect pests, including many species of aphids (Apablaza and Stevenson, 1995;Blackman and Eastop, 2000). Coccinellids are among the most efficient and abundant biological control agents of aphids, playing an important role in keeping aphid densities low (Obrycki and Kring, 1998;Dixon, 2000).…”

Section: Introductionmentioning

confidence: 99%

Migration of coccinellids to alfalfa fields with varying adjacent vegetation in Central Chile

et al. 2010

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) placed at the borders between alfalfa fields and adjacent vegetation. We also estimated the abundance of aphid populations in the alfalfa fields, by counting the number of individuals per alfalfa stem in spring, summer and autumn. We collected 90,396 coccinellids from 14 species. Neither total abundance nor species richness of coccinellids was significantly affected by adjacent vegetation, but Adalia deficiens, Psyllobora picta and Cycloneda sanguinea were more abundant in alfalfa adjacent to Eucalyptus and F-B-P, meanwhile Olla v-nigrum next to annual crops and Hyperaspis sphaeridioides next to vineyards. Edge height and orientation explained 94% of the variance in species abundance. Particularly, P. picta and O. v-nigrum were positively and negatively influenced by border height, respectively. Hyperaspis sphaeridioides was negatively affected by northern exposure and none of the species was affected by edge permeability. Aphids were less abundant in alfalfa fields adjacent to F-B-P, especially in spring. These results show that most species of coccinellids were not affected by the composition of crop edges, although tall permanent edges may enhance the arrival of particular coccinellid species to alfalfa fields.

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“…& Rabinovich, 1974;Angulo & Weigert, 1975;Cortes, 1976;Hichins O. & Mendoza M., 1976;Porter, 1980;Castillo & Angulo, 1991;Arce de Hamity & Neder de Roman, 1992;, Rojas et al, 1993Apablaza & Stevenson, 1995;Larrain S., 1996) Pisum spp.…”

Section: ) Buxaceaeunclassified

A pest risk assessment for Copitarsia spp., Insects associated with importation of commodities into the United States

Venette

Gould

2006

Euphytica

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Eggs and larvae of Copitarsia spp. (Lepidoptera: Noctuidae) are frequently intercepted on fresh commodities arriving in the United States from Mexico, Central America, and South America. Copitarsia spp. are not known to occur in the US and, thus, are considered actionable pests by the US Department of Agriculture, Animal and Plant Health Inspection Service (USDA, APHIS). Whenever the genus is detected in imported goods, shipments must be disinfested, destroyed, or returned to the country of origin. Inspections and interdictions might be unnecessary if Copitarsia spp. were unlikely to establish in the US or if consequences of Copitarsia establishment were trivial. Consequently, we prepared a qualitative pest risk assessment to characterize the degree of risk posed by the genus to US agricultural and natural ecosystems. Published literature was consulted to describe the biology and ecology of the genus. Trade statistics and interception records were summarized to identify pathways of introduction. With this information, experts assigned risk ratings to each of eleven elements identified by USDA, APHIS that pertained to the likelihood or consequence of exotic-pest establishment. The likelihood of Copitarsia spp. becoming established in the US was considered high, but confidence in this assessment was low. Similarly, consequences of Copitarsia establishment were rated high, but confidence in this assessment was moderate. Overall, the assessment revealed that Copitarsia pose a high degree of risk to the US and phytosanitary measures to exclude the pest seem warranted. However, additional research is needed to address critical data gaps and refine assessments of risk for individual species within the genus.

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Fluctuaciones poblacionales de áfidos y de otros artrópodos en el follaje de alfalfa cultivada en la Región Metropolitana

Cited by 8 publications

References 0 publications

Life, Seasonal Cycles, and Population Fluctuation of Hippodamia variegata (Goeze) (Coleoptera: Coccinellidae), in the Central Plain of La Araucanía Region, Chile

Life, Seasonal Cycles, and Population Fluctuation of Hippodamia variegata (Goeze) (Coleoptera: Coccinellidae), in the Central Plain of La Araucanía Region, Chile

Migration of coccinellids to alfalfa fields with varying adjacent vegetation in Central Chile

A pest risk assessment for Copitarsia spp., Insects associated with importation of commodities into the United States

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