Results 51 to 60 of about 42,857 (171)

Cicada's wings as determinant factor for the sound emission: The case of \textit{Quesada gigas} [PDF]

open access: yesarXiv, 2006
Cicadas (Homoptera:Cicadidae) are insects able to produce loudly songs and it is known that the mechanism to produce sound of tymballing cicadas works as a Helmholtz resonator. In this work we offer evidence on the participation of the wings in a high quality resonating process which defines the details of the acoustic properties of the calling song ...
arxiv  

First Record of \u3ci\u3eAphis Helianthi\u3c/i\u3e (Homoptera: Aphididae) as a Pest of Celery [PDF]

open access: yes, 2017
In 1989, the aphid Aphis helianthi severely damaged five of 10 scouted celery fields in west central Michigan. In 1990 and in 1991, A. helianthi again was a problem. reaching pestiferous levels in three of 10 and two of 10 scouted fields.
Davis, M. G. Kortier, Grafius, E.
core   +1 more source

Modelling agricultural landscape complementation for natural pest control

open access: yesJournal of Applied Ecology, Volume 61, Issue 11, Page 2701-2716, November 2024.
Our modelling study provides insights in the role of landscape complementation for natural pest control in arable crops by revealing where resource discontinuities can become bottlenecks. Effective natural pest control relies on a variety of different habitats that provide floral and prey resources during different times of the year, for example a ...
Laura Mansier, Paul C. J. van Rijn
wiley   +1 more source

Nova espécie de Parabahita Linnavuori (Homoptera: Cicadellidae: Deltocephalinae) [PDF]

open access: yesActa Amazonica, 2001
Uma nova espécie de Parabahita Linnavuori, 1959 é descrita e ilustrada: Parabahita caudata sp. nov. (Brasil, Rondônia)
Keti Maria Rocha ZANOL
doaj   +1 more source

Biochemical mechanism of resistance in some Brassica genotypes against Lipaphis erysimi (Kaltenbach) (Homoptera: Aphididae) [PDF]

open access: yesVegetos 2017, 26(2): 387-395, 2017
Two years study was carried out during 2006-07 and 2007-08 crop seasons to study the response of different genotypes of oilseeds Brassica to Lipaphis erysimi (Kaltenbach) infestation both under field and screen house conditions and to find out the relationship of various biochemical constituents to aphid infestation.
arxiv  

Möglichkeiten zur biologischen Bekämpfung des Zwiebelthrips Thrips tabaci LINDEMAN (Thys., Thripidae) durch verschiedene, entomopathogene Pilze aus Thailand [PDF]

open access: yes, 2008
The onion thrips, Thrips tabaci LINDEMAN (Thys., Thripidae) is an important pest of field and greenhouse crops around the world. It causes damage directly through feeding and indirectly through the transmission of lethal plant viruses. It is difficult to
Blaeser, Peter   +2 more
core  

Performance of DNA metabarcoding, standard barcoding and morphological approaches in the identification of insect biodiversity

open access: yesMolecular Ecology Resources, Volume 24, Issue 8, November 2024.
Abstract For two decades, DNA barcoding and, more recently, DNA metabarcoding have been used for molecular species identification and estimating biodiversity. Despite their growing use, few studies have systematically evaluated these methods.
Romana Salis   +4 more
wiley   +1 more source

Arthropod diversity in peas with normal or reduced waxy bloom [PDF]

open access: yes, 2004
Crop traits can alter economically important interactions between plants, pests, and biological control agents. For example, a reduced waxy bloom on the surface of pea plants alters interactions between pea aphids and their natural enemies. In this study,
Biggam, Russell C.   +3 more
core   +2 more sources

Commodity risk assessment of Petunia spp. and Calibrachoa spp. unrooted cuttings from Costa Rica

open access: yesEFSA Journal, Volume 22, Issue 11, November 2024.
Abstract The European Commission requested the EFSA Panel on Plant Health to evaluate the probability of entry of pests (likelihood of pest freedom at entry), including both regulated and non‐regulated pests, associated with unrooted cuttings of the genera Petunia and Calibrachoa produced under physical isolation in Costa Rica.
EFSA Panel on Plant Health (PLH)   +37 more
wiley   +1 more source

A new species of Aleurolobus Quaintance et Baker (Homoptera, Aleyrodidae) from Southern Europe. [PDF]

open access: yes, 1996
Aleurolobus teucrii n. sp. is described from southern Italy and the Maltese Islands (Central Mediterranean). The species seems to be monophagous on Teucrium fruticans L. A key to the European species of this genus (A.
Mifsud, David, Palmeri, Vincenzo
core  

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