A STRAIN OF FRUITTREE LEAFROLLER, <i>ARCHIPS ARGYROSPILUS</i> (LEPIDOPTERA: TORTRICIDAE), TOLERANT TO AZINPHOS-METHYL IN AN APPLE ORCHARD REGION OF THE OKANAGAN VALLEY OF BRITISH COLUMBIA

Vakenti, Jerry M.; Campbell, C. J.; Madsen, Harold F.

doi:10.4039/ent11669-1

Cited by 11 publications

(9 citation statements)

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“…Leafroller control in commercial apple orchards in British Columbia has involved the use of organophosphate insecticides since the 1960s, with diazinon and azinphosmethyl the most widely used (Madsen 1969). Neonate larvae of fruittree leafroller were first reported to be resistant to diazinon in 1977 (Madsen and Carty 1977) and to azinphosmethyl in the early 1980s (Vakenti et al 1984). Cossentine and Jensen (1991) reported that LD 50 values for azinphosmethyl of male A. argyrospila caught in pheromone traps from 1986 to 1988 were similar to those reported by Vakenti et al (1984), and generally reflected the success of control measures in individual orchards.…”

Section: Introductionmentioning

confidence: 73%

“…Neonate larvae of fruittree leafroller were first reported to be resistant to diazinon in 1977 (Madsen and Carty 1977) and to azinphosmethyl in the early 1980s (Vakenti et al 1984). Cossentine and Jensen (1991) reported that LD 50 values for azinphosmethyl of male A. argyrospila caught in pheromone traps from 1986 to 1988 were similar to those reported by Vakenti et al (1984), and generally reflected the success of control measures in individual orchards. There have not been any reports of resistance in populations of A. rosana, likely because the two sympatric univoltine leafrollers are similar in appearance as larvae, exhibit the same phenology, and are difficult to distinguish accurately without rearing specimens to adulthood.…”

Section: Introductionmentioning

confidence: 73%

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Variation in response to insecticides in two species of univoltine leafrollers (Lepidoptera: Tortricidae)

2003

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Populations of fruittree leafroller, Archips argyrospila (Walker), and European leafroller, Archips rosana L., were obtained from eight sites in the Okanagan Valley, British Columbia, and assayed for their responses to five insecticides using a leaf-disk bioassay and neonate larvae. Lethal concentration ratios (LCR values) were calculated for all populations compared with the most susceptible strain, and significant variation was detected in both species. LCR values ranged from 1.04 to 9.06 for azinphosmethyl, from 1.29 to 53.15 for tebufenozide (Confirm®), from 1.85 to 24.69 for methoxyfenozide (Intrepid®), from 1.59 to 2291.4 for indoxacarb (Avaunt®), and from 1.92 to 1.98 for spinosad (Success®). Methoxy fenozide was approximately 100-fold more toxic to neonate leafrollers than was tebufenozide, and spinosad was the most toxic of all materials tested. Correlation analysis indicated that there was cross-resistance between azinphosmethyl and tebufenozide. At the LC50 level, the responses of the two species were not significantly different for each insecticide. Analysis of equivalency and parallelism of dose-response lines revealed that A. argyrospila and A. rosana had equivalent responses to azinphosmethyl. LC50 values for the response of A. argyrospila to azinphosmethyl were not different from values obtained almost 20 years earlier. Cross-resistance between azinphosmethyl and tebufenozide suggests that resistance management for these two species of univoltine leafrollers should not include rotation of azinphosmethyl and benzoylhydrazine insect-growth regulators. The high level of resistance to indoxacarb found in one population indicates that baseline tolerance screening is desirable before indoxacarb is introduced for use in Canadian orchards.

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Section: Introductionmentioning

confidence: 73%

Section: Introductionmentioning

confidence: 73%

Variation in response to insecticides in two species of univoltine leafrollers (Lepidoptera: Tortricidae)

2003

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“…A. argyrospila has developed resistance to the organophosphate insecticides diazinon (Madsen & Carty, 1977) and azinphosmethyl (Vakenti et al, 1984) in parts of the Okanagan valley. These findings indicate that A. rosana should be more successful in exploiting a wider host range than are A. argyrospila.…”

Section: Discussionmentioning

confidence: 99%

“…A. argyrospila may therefore be the dominant species only under conditions where they have some other biological advantage, such as resistance to insecticides. A. argyrospila has developed resistance to the organophosphate insecticides diazinon (Madsen & Carty, 1977) and azinphosmethyl (Vakenti et al, 1984) in parts of the Okanagan valley. There have been no reports of insecticide resistance in A. rosana or in the two bivoltine species in British Columbia.…”

Section: Discussionmentioning

confidence: 99%

Larval performance of two leafroller species on known and potential hosts

Smirle

1993

Entomologia Exp Applicata

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Two univoltine leafroller species, Archips argyrospila Walker and Archips rosana L., were reared from eclosion to adulthood on known or potential host plants. Both species were able to complete development on eight of the ten plants tested, the exceptions being apricot and peach. Rates of development differed among hosts, and indicated a range of host suitability. Differences in female pupal weights were apparent following the different rearing treatments, but these did not correlate with subsequent female fecundity. When development was compared between the two leafroller species, A. rosana had higher survivorship, more rapid development and higher female fecundity than did A. argyrospila, regardless of host. These findings indicate that A. rosana may successfully exploit a wider host range than does A. argyrospila. Comparisons of survivorship and developmental rates among hosts for each species of leafroller suggest that both species may have the potential for host-range expansion.

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“…Chemical pesticides are effective against the tortrix moths and larvae; however, they also kill non-target beneficial insects, especially the pollinators for J. curcas [ 29 ]. Previously, Bt -derived biological insecticides were used to control tortrix moths Archips argyrospilus (Walker) on apple and pear [ 30 , 31 ] and Archips rosanus (L.) on filberts [ 32 ]. The effectiveness of Bt on the two tortrix moths suggests cry gene may be used to control A. micaceanus on J. curcas plants.…”

Section: Introductionmentioning

confidence: 99%

Production of marker-free transgenic Jatropha curcas expressing hybrid Bacillus thuringiensis δ-endotoxin Cry1Ab/1Ac for resistance to larvae of tortrix moth (Archips micaceanus)

Mao

Zhen

2014

Biotechnol Biofuels

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BackgroundThe potential biofuel plant Jatropha curcas L. is affected by larvae of Archips micaceanus (Walker), a moth of the family Tortricidae. The hybrid Bacillus thuringiensis (Bt) δ-endotoxin protein Cry1Ab/1Ac confers resistance to lepidopteran insects in transgenic rice.ResultsHere, we report the production of a marker-free transgenic line of J. curcas (L10) expressing Cry1Ab/1Ac using Agrobacterium-mediated transformation and a chemically regulated, Cre/loxP-mediated DNA recombination system. L10 carries a single copy of marker-free T-DNA that contains the Cry1Ab/1Ac gene under the control of a maize phosphoenolpyruvate carboxylase gene promoter (P Pepc :Cry1Ab/1Ac:T Nos ). The P Pepc :Cry1Ab/1Ac:T Nos gene was highly expressed in leaves of L10 plants. Insecticidal bioassays using leaf explants of L10 resulted in 80-100% mortality of larvae of A. micaceanus at 4 days after infestation.ConclusionThe results demonstrate that the hybrid Bt δ-endotoxin protein Cry1Ab/1Ac expressed in Jatropha curcas displays strong insecticidal activity to A. micaceanus. The marker-free transgenic J. curcas line L10 can be used for breeding of insect resistance to A. micaceanus.

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A STRAIN OF FRUITTREE LEAFROLLER, ARCHIPS ARGYROSPILUS (LEPIDOPTERA: TORTRICIDAE), TOLERANT TO AZINPHOS-METHYL IN AN APPLE ORCHARD REGION OF THE OKANAGAN VALLEY OF BRITISH COLUMBIA

Cited by 11 publications

References 4 publications

Variation in response to insecticides in two species of univoltine leafrollers (Lepidoptera: Tortricidae)

Variation in response to insecticides in two species of univoltine leafrollers (Lepidoptera: Tortricidae)

Larval performance of two leafroller species on known and potential hosts

Production of marker-free transgenic Jatropha curcas expressing hybrid Bacillus thuringiensis δ-endotoxin Cry1Ab/1Ac for resistance to larvae of tortrix moth (Archips micaceanus)

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