Cold susceptibility and disinfestation of Bactrocera invadens (Diptera: Tephritidae) in oranges.
Identifieur interne : 000741 ( PubMed/Checkpoint ); précédent : 000740; suivant : 000742Cold susceptibility and disinfestation of Bactrocera invadens (Diptera: Tephritidae) in oranges.
Auteurs : T G Grout [Afrique du Sud] ; J H Daneel ; S A Mohamed ; S. Ekesi ; P W Nderitu ; P R Stephen ; V. HattinghSource :
- Journal of economic entomology [ 0022-0493 ] ; 2011.
English descriptors
- KwdEn :
- MESH :
- growth & development : Larva.
- methods : Insect Control.
- parasitology : Citrus sinensis, Fruit.
- Animals, Cold Temperature, Food Parasitology, Tephritidae.
Abstract
To develop a cold disinfestation treatment for the fruit fly Bactrocera invadens Drew, Tsuruta & White (Diptera: Tephritidae) that is rapidly spreading across Africa, research was conducted in Nairobi, Kenya, using flies from a laboratory culture and 'Valencia' orange (Citrus sinensis L. Osbeck) as the host. The developmental rate of B. invadens in Valencia oranges was determined at 28 degrees C, and the third instar was found to be the least susceptible of the egg and larval life stages to cold treatment at 1.1 degrees C in oranges. When 22,449 B. invadens third instars were exposed in oranges to a cold treatment with an approximate midpoint of 1.1 +/- 0.5 degrees C, the results suggested that a period of 16 d would be worthwhile verifying on a larger scale in oranges. Results from the first replicate of 16,617 larvae showed no survivors, but the second replicate of 23,536 larvae had three survivors. Because a longer cold treatment based on a mean temperature of 1.1 degrees C would create logistical difficulties for some export markets, further replicates were conducted at an approximate midpoint of 0.5 degrees C and at mean hourly maximum of 0.9 +/- 0.5 degrees C, for 16 d. After three replicates, in which 65,752 B. invadens third instars in total were treated with no survivors, the Japanese requirement of 99.99% mortality at the 95% confidence level was surpassed. The following treatment protocol for B. invadens larvae in oranges can therefore be recommended: fruit pulp to be maintained at temperatures of 0.9 degrees C or lower for 16 consecutive days.
PubMed: 21882681
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Ekesi</name></author><author><name sortKey="Nderitu, P W" sort="Nderitu, P W" uniqKey="Nderitu P" first="P W" last="Nderitu">P W Nderitu</name></author><author><name sortKey="Stephen, P R" sort="Stephen, P R" uniqKey="Stephen P" first="P R" last="Stephen">P R Stephen</name></author><author><name sortKey="Hattingh, V" sort="Hattingh, V" uniqKey="Hattingh V" first="V" last="Hattingh">V. 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Hattingh</name></author></analytic><series><title level="j">Journal of economic entomology</title><idno type="ISSN">0022-0493</idno><imprint><date when="2011" type="published">2011</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Animals</term><term>Citrus sinensis (parasitology)</term><term>Cold Temperature</term><term>Food Parasitology</term><term>Fruit (parasitology)</term><term>Insect Control (methods)</term><term>Larva (growth & development)</term><term>Tephritidae</term></keywords><keywords scheme="MESH" qualifier="growth & development" xml:lang="en"><term>Larva</term></keywords><keywords scheme="MESH" qualifier="methods" xml:lang="en"><term>Insect Control</term></keywords><keywords scheme="MESH" qualifier="parasitology" xml:lang="en"><term>Citrus sinensis</term><term>Fruit</term></keywords><keywords scheme="MESH" xml:lang="en"><term>Animals</term><term>Cold Temperature</term><term>Food Parasitology</term><term>Tephritidae</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">To develop a cold disinfestation treatment for the fruit fly Bactrocera invadens Drew, Tsuruta & White (Diptera: Tephritidae) that is rapidly spreading across Africa, research was conducted in Nairobi, Kenya, using flies from a laboratory culture and 'Valencia' orange (Citrus sinensis L. Osbeck) as the host. The developmental rate of B. invadens in Valencia oranges was determined at 28 degrees C, and the third instar was found to be the least susceptible of the egg and larval life stages to cold treatment at 1.1 degrees C in oranges. When 22,449 B. invadens third instars were exposed in oranges to a cold treatment with an approximate midpoint of 1.1 +/- 0.5 degrees C, the results suggested that a period of 16 d would be worthwhile verifying on a larger scale in oranges. Results from the first replicate of 16,617 larvae showed no survivors, but the second replicate of 23,536 larvae had three survivors. Because a longer cold treatment based on a mean temperature of 1.1 degrees C would create logistical difficulties for some export markets, further replicates were conducted at an approximate midpoint of 0.5 degrees C and at mean hourly maximum of 0.9 +/- 0.5 degrees C, for 16 d. After three replicates, in which 65,752 B. invadens third instars in total were treated with no survivors, the Japanese requirement of 99.99% mortality at the 95% confidence level was surpassed. The following treatment protocol for B. invadens larvae in oranges can therefore be recommended: fruit pulp to be maintained at temperatures of 0.9 degrees C or lower for 16 consecutive days.</div></front></TEI><pubmed><MedlineCitation Status="MEDLINE" Owner="NLM"><PMID Version="1">21882681</PMID><DateCreated><Year>2011</Year><Month>9</Month><Day>2</Day></DateCreated><DateCompleted><Year>2011</Year><Month>10</Month><Day>13</Day></DateCompleted><DateRevised><Year>2011</Year><Month>9</Month><Day>2</Day></DateRevised><Article PubModel="Print"><Journal><ISSN IssnType="Print">0022-0493</ISSN><JournalIssue CitedMedium="Print"><Volume>104</Volume><Issue>4</Issue><PubDate><Year>2011</Year><Month>Aug</Month></PubDate></JournalIssue><Title>Journal of economic entomology</Title><ISOAbbreviation>J. Econ. Entomol.</ISOAbbreviation></Journal><ArticleTitle>Cold susceptibility and disinfestation of Bactrocera invadens (Diptera: Tephritidae) in oranges.</ArticleTitle><Pagination><MedlinePgn>1180-8</MedlinePgn></Pagination><Abstract><AbstractText>To develop a cold disinfestation treatment for the fruit fly Bactrocera invadens Drew, Tsuruta & White (Diptera: Tephritidae) that is rapidly spreading across Africa, research was conducted in Nairobi, Kenya, using flies from a laboratory culture and 'Valencia' orange (Citrus sinensis L. Osbeck) as the host. The developmental rate of B. invadens in Valencia oranges was determined at 28 degrees C, and the third instar was found to be the least susceptible of the egg and larval life stages to cold treatment at 1.1 degrees C in oranges. When 22,449 B. invadens third instars were exposed in oranges to a cold treatment with an approximate midpoint of 1.1 +/- 0.5 degrees C, the results suggested that a period of 16 d would be worthwhile verifying on a larger scale in oranges. Results from the first replicate of 16,617 larvae showed no survivors, but the second replicate of 23,536 larvae had three survivors. Because a longer cold treatment based on a mean temperature of 1.1 degrees C would create logistical difficulties for some export markets, further replicates were conducted at an approximate midpoint of 0.5 degrees C and at mean hourly maximum of 0.9 +/- 0.5 degrees C, for 16 d. After three replicates, in which 65,752 B. invadens third instars in total were treated with no survivors, the Japanese requirement of 99.99% mortality at the 95% confidence level was surpassed. 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Ekesi</name><name sortKey="Hattingh, V" sort="Hattingh, V" uniqKey="Hattingh V" first="V" last="Hattingh">V. Hattingh</name><name sortKey="Mohamed, S A" sort="Mohamed, S A" uniqKey="Mohamed S" first="S A" last="Mohamed">S A Mohamed</name><name sortKey="Nderitu, P W" sort="Nderitu, P W" uniqKey="Nderitu P" first="P W" last="Nderitu">P W Nderitu</name><name sortKey="Stephen, P R" sort="Stephen, P R" uniqKey="Stephen P" first="P R" last="Stephen">P R Stephen</name></noCountry><country name="Afrique du Sud"><noRegion><name sortKey="Grout, T G" sort="Grout, T G" uniqKey="Grout T" first="T G" last="Grout">T G Grout</name></noRegion></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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