Effect of horticultural oil on oviposition behaviour and egg survival in the obliquebanded leafroller (Lepidoptera: Tortricidae)

2009 ◽  
Vol 141 (1) ◽  
pp. 86-94 ◽  
Author(s):  
A.H. Wins-Purdy ◽  
C. Whitehouse ◽  
G.J.R. Judd ◽  
M.L. Evenden
Keyword(s):  
Topical Application ◽  
Gravid Female ◽  
Management Program ◽  
Oviposition Behaviour ◽  
Contact Toxicity ◽  
Choristoneura Rosaceana ◽  
Pest Species ◽  
Egg Survival ◽  
Obliquebanded Leafroller ◽  
Important Pest

AbstractThe effects of the horticultural oil Purespray Green on oviposition behaviour and egg development in the obliquebanded leafroller, Choristoneura rosaceana (Harris), were investigated through dual-choice and no-choice bioassays and topical applications of oil to developing eggs. A residual 2% (v/v) oil spray on wax-paper and apple-leaf substrates significantly reduced both the number of eggs laid and egg survival in no-choice assays; however, this effect diminished 3 days after treatment. In dual-choice assays, females laid significantly fewer eggs on oil-treated apple leaves than on control leaves, but laid equal numbers of eggs on the oil-treated wax paper and the untreated wax-paper controls. Topical application of oil caused significant dose-dependent mortality of both newly laid eggs and eggs just before hatch, and these two egg stages were equally susceptible to the oil. Topical application of 2% oil caused >99% egg mortality. Our data indicate that gravid female C. rosaceana can assess and reject oil-sprayed surfaces and that the oil can kill eggs through both contact toxicity and suffocation. These characteristics suggest that highly purified horticultural oils like Purespray Green could play a role in an integrated pest management program for this important pest species.

Vine Weevil, Otiorhynchus sulcatus (Coleoptera: Curculionidae), Management: Current State and Future Perspectives

2022 ◽  
Vol 67 (1) ◽  
pp. 221-238
Author(s):  
Tom W. Pope ◽  
Joe M. Roberts
Keyword(s):  
Integrated Management ◽  
Crop Protection ◽  
Management Program ◽  
Pest Species ◽  
Horticultural Crops ◽  
Otiorhynchus Sulcatus ◽  
Key Factor ◽  
Important Pest ◽  
Black Vine Weevil ◽  
Management Approaches

Vine weevil, also known as black vine weevil, Otiorhynchus sulcatus, has been one of the most economically important pest species of global horticultural crops for the past five decades. This period has seen many changes in crop protection practices, including wide-scale adoption of biological controls such as entomopathogenic nematodes and fungi in place of conventional synthetic insecticides. Despite the experimental efficacy of these controls, growers continue to report significant crop losses associated with vine weevil infestation. We argue that simply switching from synthetic insecticides to biological controls, rather than using these controls as part of an integrated management program, is a key factor in the continued importance of this pest. An improved understanding of vine weevil biology and ecology is at the center of the development of truly integrated pest management programs. To this end, we identify opportunities created through recent vine weevil research and highlight key knowledge gaps in which further research may contribute to improved future management approaches.

Parasitoid guild and parasitism rate of the obliquebanded leafroller in IPM orchards and adjacent woodlands

2018 ◽  
Vol 98 (1) ◽  
pp. 36-45
Author(s):  
Jacinthe Tremblay ◽  
Paula Cabrera ◽  
Daniel Cormier ◽  
Jacques Brodeur ◽  
Éric Lucas
Keyword(s):  
Integrated Pest Management ◽  
Pest Management ◽  
Late Summer ◽  
Early Summer ◽  
Management Program ◽  
Choristoneura Rosaceana ◽  
Parasitism Rate ◽  
Obliquebanded Leafroller ◽  
Parasitism Rates ◽  
Parasitoid Guild

The obliquebanded leafroller (OBLR), Choristoneura rosaceana (Harris) [Lepidoptera: Tortricidae], a primary pest in Quebec apple orchards, can be naturally parasitized. Knowing that habitats around crop’s peripheries are reservoirs for natural enemies of pests, the objective of the present investigation was to assess parasitism and parasitoid guild composition associated with the OBLR. The two-year study included orchards under integrated pest management, their edges, and adjacent woodlands. Parasitism was assessed using sentinel OBLR larvae and considered spring, early summer and late summer. Parasitism rates between regions with different vegetation composition were not significantly different. The first year, late summer larvae showed higher parasitism in orchards (27%), compared to edges (7%) and woodlands (11%). The following year, larvae exposed in early summer had higher parasitism rate in edges (28%) compared to orchards and woodlands (17% in both zones). Nineteen parasitoid species parasitized sentinel larvae. The tachinid Actia interrupta (Curran), the most abundant species, represented 28 and 62% of species the first and the second year respectively. Our research demonstrates that natural biological regulation of the OBLR is the result of a highly diversified parasitoid guild and this should be taken into account in any Integrated Pest Management program.

Response of Tortricid Moths and Non-Target Insects to PheromoneTrap Color in Commercial Apple Orchards

2009 ◽  
Vol 44 (1) ◽  
pp. 69-77 ◽  
Author(s):  
Clayton T. Myers ◽  
Grzegorz Krawczyk ◽  
Arthur M. Agnello
Keyword(s):  
New York ◽  
Cydia Pomonella ◽  
Codling Moth ◽  
Oriental Fruit Moth ◽  
Choristoneura Rosaceana ◽  
Pest Species ◽  
Apple Orchards ◽  
Eastern United States ◽  
Obliquebanded Leafroller ◽  
Tufted Apple Bud Moth

Pheromone traps are a widely-used tool for monitoring pest activity in commercial apple orchards. Studies were conducted to evaluate delta-style traps painted with different colors (orange, red, yellow, green, blue, and white) for capture of obliquebanded leafroller, Choristoneura rosaceana (Harris), and oriental fruit moth, Grapholita molesta (Busck), as well as nontarget muscoid flies (Diptera: Muscidae) and honeybees, Apis mellifera L. An additional study evaluated plastic, four-sided LepTrap® traps of various colors in comparison with a standard delta trap for capture of obliquebanded leafroller, oriental fruit moth, tufted apple bud moth (Platynota idaeusalis (Walker)), and codling moth (Cydia pomonella L.). Capture of obliquebanded leafroller and oriental fruit moth was not significantly affected by trap color. Capture of nontarget flies and honeybees tended to be higher in blue and white (both painted and unpainted) delta-style traps in New York apple orchards, although there was some variability in this response by orchard site. There were no differences in capture of 4 pest species in Pennsylvania between colored, plastic LepTrap® traps and standard unpainted white delta-style traps. Given the observed differences in nontarget capture and the improved efficiencies of finding traps placed within tree canopies, we recommend using yellow, red, or orange delta traps for monitoring of obliquebanded leafroller, oriental fruit moth, and tufted apple bud moth in apple production areas in the eastern United States.

Percussion signals of Lygus rugulipennis Poppius (Heteroptera: Miridae)

2014 ◽  
Vol 9 (5) ◽  
pp. 543-549
Author(s):  
Sándor Koczor ◽  
Andrej Cokl
Keyword(s):  
Dominant Frequency ◽  
Laser Vibrometer ◽  
Pest Species ◽  
Adult Males ◽  
Tarnished Plant Bug ◽  
Lygus Rugulipennis ◽  
Important Pest ◽  
Low Pass ◽  
Males And Females ◽  
Study Laboratory

AbstractThe European tarnished plant bug (Lygus rugulipennis Poppius) is among the most serious pests in the family Miridae, and therefore there is increasing interest in understanding the behaviour of this species. In the present study, laboratory recordings were taken using a laser vibrometer on adult males and females to ascertain whether acoustic signals are involved in intraspecific communication. Recordings were both carried out on plant and loudspeaker membrane substrates. Males and females emitted vibratory signals and the present results indicate that these signals are important during courtship. The basic signal characteristics measured were the dominant frequency, pulse duration, repetition time and number of pulses per group within the signal. Male and female signals did not differ in respect to any of these characteristics. Plant recorded signals were longer because of different mechanical properties of substrates. Additionally, the high frequency components were attenuated due to the low-pass filtering properties of plants. As this is the first study on vibratory communication of the European tarnished plant bug, we believe these findings may contribute considerably to the better understanding of the mating behavior of this important pest species.

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.

Spider mites of agricultural importance in China, with focus on species composition during the last decade (2008–2017) 

2018 ◽  
Vol 23 (11) ◽  
pp. 2087 ◽  
Author(s):  
Peng-Yu Jin ◽  
Lu Tian ◽  
Lei Chen ◽  
Xiao-Yue Hong
Keyword(s):  
Species Composition ◽  
Dominant Species ◽  
Integrated Management ◽  
Management Strategies ◽  
Spider Mites ◽  
Management Program ◽  
Pest Species ◽  
Panonychus Citri ◽  
Important Species ◽  
River Region

Understanding pest species composition and their geographic distribution of important spider mites is fundamental and indispensable to establish an integrated pest management program. From a long-term survey during 2008–2017 in mainland China, we found that Tetranychus truncatus was the most frequently sampled Tetranychus spider mite (48.5%), followed by T. pueraricola (21.2%), T. kanzawai (12.5%), T. urticae (red) (5.7%) and T. urticae (green) (4.5%). Among them, T. truncatus was the major mite pest in the north of China. T. kanzawai was the dominant species in the Middle and Lower Reaches of the Yangtze River Region and T. pueraricola was the most important species in the southwest region. Other common and serious pests include Amphitetranychus viennensis (6.8%) and Panonychus citri (3.8%). This pattern was largely different from that in 2002–2004, when T. urticae (green and red) was believed to be the most serious mite pest. The factors involved in the change of species composition are not clear and need more exploration. We suggested that the increasing corn planting range may be partly responsible for the conversion of dominant species from other spider mites to T. truncatus. Further research on the mechanisms underlying the change of dominant species will help develop integrated management strategies.

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 Cryptic Diversity Hidden within the Leafminer Genus Liriomyza (Diptera: Agromyzidae)

Genes ◽  
2018 ◽  
Vol 9 (11) ◽  
pp. 554 ◽  
Author(s):  
Antonio Carapelli ◽  
Abir Soltani ◽  
Chiara Leo ◽  
Matteo Vitale ◽  
Moez Amri ◽  
...  
Keyword(s):  
Population Genetics ◽  
Species Delimitation ◽  
Decisive Role ◽  
Molecular Data ◽  
Point Of View ◽  
Species Differentiation ◽  
Pest Species ◽  
Human Diet ◽  
Important Pest ◽  
Highly Uniform

Leafminer insects of the genus Liriomyza are small flies whose larvae feed on the internal tissue of some of the most important crop plants for the human diet. Several of these pest species are highly uniform from the morphological point of view, meaning molecular data represents the only reliable taxonomic tool useful to define cryptic boundaries. In this study, both mitochondrial and nuclear molecular markers have been applied to investigate the population genetics of some Tunisian populations of the polyphagous species Liriomyza cicerina, one of the most important pest of chickpea cultivars in the whole Mediterranean region. Molecular data have been collected on larvae isolated from chickpea, faba bean, and lentil leaves, and used for population genetics, phylogenetics, and species delimitation analyses. Results point toward high differentiation levels between specimens collected on the three different legume crops, which, according to the species delimitation methods, are also sufficient to define incipient species differentiation and cryptic species occurrence, apparently tied up with host choice. Genetic data have also been applied for a phylogenetic comparison among Liriomyza species, further confirming their decisive role in the systematic studies of the genus.

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.

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