Occurrence of resistance to insecticides in populations of the obliquebanded leafroller from orchards

2001 ◽  
Vol 133 (1) ◽  
pp. 93-103 ◽  
Author(s):  
D.J. Pree ◽  
K.J. Whitty ◽  
M.K. Pogoda ◽  
L.A. Bittner
Keyword(s):  
Cross Resistance ◽  
Choristoneura Rosaceana ◽  
Southern Ontario ◽  
Obliquebanded Leafroller ◽  
Selection For ◽  
Production Areas ◽  
Neonate Larvae ◽  
Control Failures ◽  
Wild Hosts ◽  
Laboratory Bioassays

AbstractThe occurrence and distribution of resistance to insecticides in populations of the obliquebanded leafroller, Choristoneura rosaceana (Harris) (Lepidoptera: Tortricidae), from apple, Malus × domestica Borkhauser (Rosaceae), and pear, Pyrus communis L. (Rosaceae), orchards in the various production areas of southern Ontario were assessed in the laboratory and field from 1993 to 1999. Laboratory bioassays were conducted with neonate larvae from the first laboratory generation. Responses of populations from commercial orchards where control failures had occurred or where populations were large or damaging were compared with populations from unsprayed wild hosts. Resistance to azinphosmethyl and to pyrethroids and methomyl was identified in populations from all areas. Resistance levels ranged from 4- to 27-fold for azinphosmethyl, 4- to 8-fold for cypermethrin (a representative pyrethroid), and 3- to 5-fold for methomyl. In the field, deltamethrin was more effective than azinphosmethyl against a population resistant to both insecticides. Resistance to azinphosmethyl was unstable and rapidly declined in a population newly established in the laboratory and not selected with azinphosmethyl. After selection for nine generations, resistance declined only slowly when selection pressure was removed for four generations. This instability may be exploited in the management of resistance, but the possible cross-resistance between azinphosmethyl and pyrethroids needs clarification.

RESISTANCE TO PYRAZOPHOS IN THE SERPENTINE LEAFMINER LIRIOMYZA TRIFOLII (BURGESS) (DIPTERA: AGROMYZIDAE) IN ONTARIO GREENHOUSES

1989 ◽  
Vol 121 (1) ◽  
pp. 47-53 ◽  
Author(s):  
A.B. Broadbent ◽  
D.J. Pree
Keyword(s):  
Organophosphorus Compound ◽  
Cross Resistance ◽  
Liriomyza Trifolii ◽  
Diethyl Maleate ◽  
Triphenyl Phosphate ◽  
Southern Ontario ◽  
Serpentine Leafminer ◽  
Control Failures

AbstractIn 1986 a greenhouse population of Liriomyza trifolii (Burgess) was shown to be highly resistant (155-fold at LC50) to the organophosphorus compound pyrazophos. However in 1987, the same population had only 35–40% resistant individuals remaining. A survey in 1986 of five other greenhouses reporting leafminer control failures indicated three other resistant populations in southern Ontario. Resistance was not affected by the addition of the synergists diethyl maleate or triphenyl phosphate to pyrazophos. Cross-resistance to the phosphorothioate insecticides demeton, chlorpyrifos, and triazophos was indicated.

OVIPOSITION PREFERENCE OF A POLYPHAGOUS MOTH, THE OBLIQUEBANDED LEAFROLLER, CHORISTONEURA ROSACEANA (HARRIS) (LEPIDOPTERA: TORTRICIDAE)

1995 ◽  
Vol 127 (4) ◽  
pp. 577-586 ◽  
Author(s):  
Y. Carrière ◽  
S. Paré ◽  
B.D. Roitberg
Keyword(s):  
Clutch Size ◽  
Rank Order ◽  
Oviposition Preference ◽  
Choristoneura Rosaceana ◽  
Aversive Learning ◽  
Abiotic Conditions ◽  
Lifetime Fecundity ◽  
Daily Pattern ◽  
Obliquebanded Leafroller ◽  
Second Clutch

AbstractThe daily pattern of oviposition, the rank order of oviposition preference for three potential hosts, and the effect of experience on oviposition preference were investigated under natural abiotic conditions in the obliquebanded leafroller, Choristoneura rosaceana. Females from the two adult cohorts occurring seasonally oviposited between 0400 and 2400 hours, with peak oviposition around 2000 hours. Both non-choice and choice oviposition trials revealed that the apple and snowberry hosts were preferred over wild rose. Oviposition preference resulted in delays in laying on the less preferred host, but seemed to have no effect on clutch size. Females caged with exclusive access to one of the three hosts appeared to have similar lifetime fecundity or longevity. A first oviposition on wild rose resulted in a delay in laying a second clutch on that host, which suggests the presence of aversive learning that could function to reduce the liklihood of laying successive clutches on a less preferred host. A first oviposition on the apple host, however, seemed to have no effect on further oviposition preference. Hence, it appears that learning would not function specifically to concentrate foraging of the females within apple orchards.

SEASONAL HISTORY, ADULT FLIGHT ACTIVITY, AND DAMAGE OF THE OBLIQUEBANDED LEAFROLLER, CHORISTONEURA ROSACEANA (LEPIDOPTERA: TORTRICIDAE), IN FILBERT ORCHARDS

1986 ◽  
Vol 118 (4) ◽  
pp. 351-359 ◽  
Author(s):  
M.T. AliNiazee
Keyword(s):  
First Generation ◽  
Adult Emergence ◽  
Flight Activity ◽  
Yield Reduction ◽  
Larval Feeding ◽  
Choristoneura Rosaceana ◽  
Periodic Field ◽  
Obliquebanded Leafroller ◽  
Two Generations ◽  
Seasonal History

AbstractSeasonal history, adult flight activity, and damage of the obliquebanded leafroller, Choristoneura rosaceana (Harris), on filbert were studied during a 7-year period between 1976 and 1984. Data from periodic field counts and moth catches in sex-attractant traps indicated two generations per year. The first-generation adult capture peak was generally higher than the second, except in 1978 when about an equal number of moths were trapped from both generations. A physiological time scale, using degree-days (DD), was devised for predicting emergence of obliquebanded leafroller adults. The first adults from overwintering larvae emerged at approximately 374 DD above a threshold of 10 °C starting 1 March. A total of 1172 DD were required between the first and the last adult emergence during the first generation and about 519 DD during the second generation. The obliquebanded leafroller causes both foliar and nut damage in filbert orchards of Oregon. Foliar damage was insignificant, but nut damage, caused exclusively by the first-generation larvae during June and early July, was highly destructive. Larval feeding on nuts caused staining and premature drop of infested nuts resulting in substantial yield reduction in heavily infested orchards.

scholarly journals Evidence for the Predisposition of Fungicide-Resistant Isolates of Venturia inaequalis to a Preferential Selection for Resistance to Other Fungicides

2001 ◽  
Vol 91 (8) ◽  
pp. 776-781 ◽  
Author(s):  
Wolfram Köller ◽  
W. F. Wilcox
Keyword(s):  
Fungicide Resistance ◽  
Venturia Inaequalis ◽  
Apple Scab ◽  
The United States ◽  
Cross Resistance ◽  
Resistance Development ◽  
Flexible Response ◽  
Sterol Demethylation Inhibitors ◽  
Selection For ◽  
Selection Of

In the United States, populations of the apple scab pathogen Venturia inaequalis have progressed through three consecutive rounds of fungicide resistance development, first to dodine, then to the benzimidazoles, and most recently to the sterol demethylation inhibitors (DMIs). Analysis of extensive monitoring data have to date provided no indication of detectable cross-resistance or partial cross-resistance of V. inaequalis populations to the three unrelated classes of fungicides prior to the selection of resistant subpopulations. However, in this study, resistance to both benomyl and DMIs developed to significantly higher frequencies within the previously established dodine-resistant population than in the population sensitive to dodine. Accelerated selection of phenotypes double resistant to dodine and the DMI fenarimol was apparent over the course of distinct seasons of apple scab management with either dodine or fenarimol. The data provide evidence for an accelerated speed of resistance development among phenotypes of V. inaequalis already resistant to an unrelated fungicide. This finding represents a departure from the previous model, which assumed entirely independent rounds of resistance developments. The data indicate that phenotypes of V. inaequalis might not only be selected for the trait of fungicide resistance but also for traits allowing a more flexible response to changes in the environment where they compete.

The Chimeric Bud-Sport ‘Delicious’ (Red) Mutant Strain, It, Expresses Lethal-Effect Resistance Against the Obliquebanded Leafroller (Lepidoptera: Tortricidae)

2020 ◽  
Vol 113 (5) ◽  
pp. 2285-2292
Author(s):  
Joseph Schwarz ◽  
Joshua Milnes ◽  
Jay Brunner
Keyword(s):  
Sublethal Effects ◽  
Gene Pyramiding ◽  
Lethal Effect ◽  
Natural Resistance ◽  
Adult Longevity ◽  
Choristoneura Rosaceana ◽  
Putative Gene ◽  
Obliquebanded Leafroller ◽  
Development Rates ◽  
Negative Impacts

Abstract Three ‘Red Delicious,’ Malus domestica Borkhausen (Rosales: Rosaceae), apple plantings, each representing a different sport, were evaluated for natural resistance against the obliquebanded leafroller (OBLR), Choristoneura rosaceana (Harris). The establishment of neonate larvae on apple foliage was not different between the three ‘Red Delicious’ plantings. Of the three ‘Red Delicious’ plantings, the one that most negatively impacted OBLR was the ‘It Delicious’ genotype. The ‘It Delicious’ genotype at the Sunrise Research Orchard exhibited essentially 100% mortality against OBLR when fed on spring and summer foliage, and mortality accumulated faster across instars than on other ‘Red Delicious’ plantings. The high mortality observed in the ‘It Delicious’ genotype points to the existence of a putative gene, which we propose as Cro1. The other ‘Red Delicious’ plantings, Columbia River Orchard and Tree Fruit Research and Extension Center Research Orchard treatments, showed negative impacts, especially when exposed to foliage from the summer compared to the spring period. Development rates in these treatments in spring were higher compared to summer, and there were direct relationships between development rates, pupal weights, and adult longevity for both males and females. These latter results suggest that sublethal effects could be present in these ‘Red Delicious’ cultivars, thus offering insights to a gene-pyramiding strategy for breeders to managing leafroller pests in Washington apple.

Nucleopolyhedrovirus infection in obliquebanded leafroller (Lepidoptera: Tortricidae)

2002 ◽  
Vol 134 (3) ◽  
pp. 303-309 ◽  
Author(s):  
I. Pronier ◽  
J. Paré ◽  
J-C Wissocq ◽  
C. Vincent
Keyword(s):  
Fat Body ◽  
Larval Mortality ◽  
Adult Emergence ◽  
Control Group ◽  
Choristoneura Rosaceana ◽  
Obliquebanded Leafroller ◽  
Naturally Occurring ◽  
The Family ◽  
Microscopic Studies ◽  
Occlusion Bodies

AbstractA virus isolated from obliquebanded leafroller, Choristoneura rosaceana (Harris), larvae collected in an apple, Malus domestica Borkh. (Rosaceae), orchard of Saint-Joseph-du-Lac (Quebec, Canada) was studied. Microscopic studies revealed that it was a uninucleocapsid nucleopolyhedrovirus from the family Baculoviridae. Larval mortality was approximately 75% (0% mortality in control group) in larvae infected as third instars immersed in a suspension of 1.7 × 108 occlusion bodies/mL. The average time for larval mortality was 23 ± 3 d after treatment. The majority (95.5%) of infected larvae died as fifth or sixth instars. Infection was observed primarily in fat body cells, and occasionally in the tracheal matrix and epidermis. Mean larval development time of infected larvae surviving to pupae was 20 ± 3 d, significantly greater than the 18 ± 3 d observed in control larvae. Adult emergence was significantly lower in pupae of treated larvae (73.6%) than in the control group (93.5%). Our work constitutes the first baseline study of naturally occurring virus of the obliquebanded leafroller.

Effect of certain monounsaturated dodecene and tetradecene acetates and alcohols on electroantennogram response and pheromone-mediated trap catch of the obliquebanded leafroller

2006 ◽  
Vol 138 (2) ◽  
pp. 218-227 ◽  
Author(s):  
R.M. Trimble ◽  
Ashraf M. El-Sayed
Keyword(s):  
Short Distance ◽  
Choristoneura Rosaceana ◽  
Inhibiting Activity ◽  
Trap Catch ◽  
Obliquebanded Leafroller ◽  
Baited Traps ◽  
Tetradecenyl Acetate ◽  
Pheromone Compound ◽  
Attraction Inhibitor ◽  
Stimulation Of

AbstractThe effect of certain monounsaturated dodecene and tetradecene acetates and alcohols on electroantennogram (EAG) response and pheromone-mediated trap catch was examined in male obliquebanded leafroller moths, Choristoneura rosaceana (Harris) (Lepidoptera: Tortricidae). The stimulation of antennae with 0.1 ng of (Z)-11-tetradecenyl acetate (Z11-14:Ac), the major pheromone compound of this species, elicited an EAG response. The use of 1 ng of (Z)-9-tetradecenyl acetate (Z9-14:Ac) or (E)-9-tetradecenyl acetate (E9-14:Ac) or 10 ng of (Z)-9-dodecenyl acetate (Z9-12:Ac) or (E)-9-dodecenyl acetate (E9-12:Ac) was required to elicit a response. One hundred nanograms of (E)-9-tetradecenol (E9-14:OH) were required to elicit a response from antennae. The stimulation of antennae with up to 100 ng of (Z)-9-tetradecenol (Z9-14:OH) did not elicit a response. The addition of 0.1 mg of Z9-12:Ac to 1 mg of synthetic C. rosaceana pheromone consisting of a 100:2:1.5:1 blend of Z11-14:Ac, (E)-11-tetradecenyl acetate, (Z)-11-tetradecenol, and (Z)-11-tetradecenal reduced the capture of moths in pheromone-baited traps by more than 72%. Trap catch was reduced by more than 90% by the addition of 0.01 mg of Z9-14:Ac or E9-14:Ac to 1 mg of C. rosaceana pheromone. There was no detectable reduction in trap catch when 1 mg of E9-12:Ac, Z9-14:OH, or E9-14:OH was added to 1 mg of C. rosaceana pheromone. There was a greater than 95% reduction in trap catch when sources of Z9- or E9-12:Ac were mounted at the entrances to traps, 10 cm from the pheromone source. Trap catch was not affected by placing sources of Z9- or E9-14:Ac at trap entrances. Four 1 or 10 mg sources of E9-14:Ac placed 1 m from a trap did not affect the number of male C. rosaceana captured. The study demonstrates that although a compound may have profound attraction inhibiting activity when mixed directly with C. rosaceana pheromone, this activity may be lost if the inhibitor is emitted a short distance from the pheromone. The study also demonstrates that a potent attraction inhibitor such as E9-14:Ac does not repel C. rosaceana males and must be present along with pheromone to affect the behavior of this species.

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