51 research outputs found
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Predation of Neoseiulus fallacis (Garman) on Yellow Spider Mite and Twospotted Spider Mite in Red Raspberry
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Prey Choice and Spatial Distribution of Neoseiulus fallacis (Garman)
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Spatial Distribution of Spider Mites (Acarina: Tetranychidae) on Red Raspberry Plants
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Preliminary Investigations on Twospotted Spider Mite, Tetranychus urticae and Yello Spider Mite, Eotetranychus carpini borealis on Raspberry in Western Washington
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Spider Mites on Red Raspberry: Predatory Role of Neoseiulus fallacis (Garman)
Factors influencing citrus fruit scarring caused by Pezothrips kellyanus
[EN] Kelly s citrus thrips (KCT) Pezothrips kellyanus
(Bagnall) (Thysanoptera: Thripidae) is a recently recorded
cosmopolitan citrus pest, causing fruit scarring that results in
downgrading of fruit. Due to the detrimental effects caused
on fruits by KCT, we wanted to study some of the factors
influencing fruit scarring. Specifically, the objectives were:
(1) to determine the fruit development stage when citrus
fruits are damaged by KCT and the population structure of
KCT during this period, (2) to study the influence of temperature
on intensity of damage, and finally, (3) to identify
alternative host plants. KCT populations on flowers and
fruitlets and alternate plant hosts were sampled in four citrus
orchards from 2008 to 2010. The percentage of damaged
fruits was also recorded. The exotic vine Araujia sericifera
(Apocynaceae) was recorded as a new host for KCT. Thrips
scarring started to increase at 350 650 degree-days (DD)
above 10.2 C, coinciding with a peak abundance of the
second instar larval stages over all 3 years of the study. The
maximum percentage of larval stages of KCT was observed
in the 3 years at about 500 DD, a period which corresponds to
the end of May or early June. Variation in the severity of fruit
scarring appeared to be related to air temperature. Temperature
likely affects the synchronisation between the peak in
abundance of KCT larvae, and the period when fruitlets are
susceptible to thrips damage. Temperature can also influence
the survival and development of KCT populations in citrus
and other host plants in the citrus agro-ecosystem.The authors thank Alejandro Tena for his valuable suggestions and two anonymous referees for their careful review and helpful comments. We also extend our thanks to the owners of the commercial orchards for giving us permission to use their citrus orchards. The first author was awarded an FPI fellowship from the Polytechnic University of Valencia to obtain her PhD degree.Navarro Campos, C.; Pekas, A.; Aguilar MartĂ, MA.; Garcia MarĂ, F. (2013). Factors influencing citrus fruit scarring caused by Pezothrips kellyanus. Journal of Pest Science. (86):459-467. doi:10.1007/s10340-013-0489-7S45946786Baker GJ (2006) Kelly citrus thrips management. Fact sheet. Government of South Australia, primary industries and resources SA. http://www.sardi.sa.gov.au/__data/assets/pdf_file/0010/44875/kctfact_sheet.pdf . 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How predatory mites cope with the web of their tetranychid prey: a functional view on dorsal chaetotaxy in the Phytoseiidae
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