Relationships Among Pheromone Trap Catches of Male Corn Earworm Moths (Lepidoptera: Noctuidae), Egg Numbers, and Phenology in Corn

Latheef, M. A.; Witz, J. A.; López, J. D.

doi:10.4039/ent123271-2

Cited by 16 publications

(7 citation statements)

References 14 publications

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“…Studies on other Lepidoptera have correlated adult male trap capture with subsequent oviposition rates, larval populations, and crop damage (Ngollo et al 2000, Latheef et al 1991, Latheef et al 1993, Asaro and Berisford 2002, Buchelos et al 1999, Polavarapu and Seabrook 1992, Carter et al 1992. Such studies must address issues of trap interference, variable wind conditions, trap saturation, and drawing range, and many have had minimal success in correlating trap-captured adults with subsequent immature stages because of these confounding and complex variables (Elkinton and Cardé 1988, Sappington and Spurgeon 2000, Schouest and Miller 1994, Sweeney et al 1990).…”

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confidence: 97%

Trap Captures of Male Grapholita libertina (Lepidoptera: Tortricidae) Moths: Relationship to Larval Numbers and Damage in Wild Lingonberry1

Hillier

Dixon

Larson

2004

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The lingonberry fruitworm, Grapholita libertina Heinrich, is a tortricid moth whose larvae infest wild lingonberry (Vaccinium vitis-idaea L. variety minus Lodd) Þelds in Newfoundland, Canada. This study investigated the potential for predicting G. libertina larval damage by using adult pheromone trap captures. Spatial patterns of capture were studied in relation to subsequent larval and damaged berry distributions in four wild lingonberry Þelds during 1998, 1999 and 2000. A model was tested that incorporated the effects of resource availability and coincident plant composition on insect distribution. In 1998 and 2000, the mean adult capture/trap correlated well with larval (R 2 ϭ 0.38 Ð 0.63) and damaged berry (R 2 ϭ 0.41Ð 0.59) density within grids at each site. In 1999, larval and damaged berry densities were not signiÞcantly correlated to adult distributions, and were more dependant on a limited host berry distribution (R 2 ϭ 0.54 and 0.47, respectively). The results of this study suggest that correlation between adult trapping of G. libertina and subsequent larval distributions is dependant on a minimal host berry population. Other factors that may contribute variability are also discussed.

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confidence: 97%

Trap Captures of Male Grapholita libertina (Lepidoptera: Tortricidae) Moths: Relationship to Larval Numbers and Damage in Wild Lingonberry1

Hillier

Dixon

Larson

2004

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“…Published estimates of the abundance of O. insidiosus in sweet corn fields range between 0.35 and 5.89 individuals per plant (Musser and Shelton 2003b; Table 1. Estimates of Helicoverpa zea oviposition and consumption rates by Orius insidiosus in Minnesota sweet corn, extrapolated from data provided by this study and others (Latheef et al 1991;Musser and Shelton 2003b;Musser et al 2004;Wold et al 2001 (Musser and Shelton 2003b;Musser et al 2004;Wold et al 2001). Musser et al 2004;Wold et al 2001).…”

Section: Discussionmentioning

confidence: 92%

“…All counts were smoothed by calculating a double, three-day moving average (Hartstack and Hollingsworth, 1974;Lopez et al, 1979). The number of male moths captured in pheromone traps can be correlated with egg laying in adjacent silking corn fields (Latheef et al, 1991). Therefore, male moth catches were used as an estimate of H. zea prey availability to O. insidiosus.…”

Section: Prey Population Monitoringmentioning

confidence: 99%

Molecular gut-content analysis reveals high frequency of Helicoverpa zea (Lepidoptera: Noctuidae) consumption by Orius insidiosus (Hemiptera: Anthocoridae) in sweet corn

et al. 2018

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Management of corn earworm Helicoverpa zea in sweet corn grown for processing can be challenging due to the lack of effective transgenic and chemical control options. However, biological control by generalist predators can provide a significant impact on pests in this cropping system. One of the most ubiquitous predators of H. zea and other lepidopterans is the insidious flower bug, Orius insidiosus. This small hemipteran has been observed as an important mortality agent of H. zea in several cropping systems, but the strength of the trophic connection between these species has not been documented in sweet corn. Molecular gut-content analysis was conducted to test field-collected O. insidiosus for the presence of H. zea DNA using species-specific PCR primers developed and optimized for this project. Controlled feeding trials determined that the detectability half-life of this technique was 2.32 h. At peak predation in late August, 32% of O. insidiosus tested digitalcommons.unl.edu P e t e r s o n e t a l. i n B i o l o g i c a l C o n t r o l 1 2 1 (2 0 1 8) 2 positive for H. zea DNA. The date of peak predation also corresponded with peak silking of sweet corn plants, which is the most attractive crop growth stage to both H. zea and O. insidiosus. These results indicate that within a short window prior to collection from the field, on the peak date of predation, approximately one third of O. insidiosus in sweet corn had consumed one to two H. zea eggs and/or first instar larvae. The demonstration of this high frequency of predation allows for the assertion that O. insidiosus is a critical mortality agent of H. zea in sweet corn, and conservation biological control practices should be explored to protect and promote this key predator.

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“…The relationship between semiochemical monitoring data and insect density has been considered (in conjunction with a related concept, the effective attraction radius) for a number of bark beetle species [73], In the corn earworm, pheromone catch in cornfields has been related to egg numbers [74], and to infestation levels [75]. Captures of Heliothis species in pheromone traps have been correlated with oviposition in cotton [76].…”

Section: Types Of Monitoringmentioning

confidence: 99%

Application of Semiochemicals in Integrated Pest Management Programs

Bjostad

Hibbard

Cranshaw

1993

ACS Symposium Series

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Chemical communication is important in the life cycles of many insect species, principally for the location of mates and food. Structural identification and synthesis has been carried out for many semiochemicals, and a number of techniques have been developed to use these compounds as components of integrated pest management (IPM) programs. Semiochemicals have two main uses in IPM programs: monitoring insect pest populations and preventing agricultural damage by interfering with insect behavior. Pheromones are perhaps the most widely exploited semiochemicals at present, but recent efforts have extended increasingly to the identification and use of compounds involved in interspecific exchange of information as well.The use of semiochemicals to manipulate insect behavior has proved to be one of the most useful components of integrated pest management (IPM) programs. Semiochemicals are compounds that are emitted or displayed by one organism and that affect the behavior of another organism [/]. Perhaps the most important semiochemicals used by insects are those involved in locating mates and food, and at present these are the kinds of semiochemicals most widely exploited for insect control. Semiochemicals with many other kinds of ecological roles have also been characterized in insects, such as compounds that function as warnings, or compounds that mediate the collective activity of many partners in completing large tasks. A number of major reviews of the use of semiochemicals in IPM programs have appeared [7][8][9], as well as a critical review of semiochemical utility in general [10], An extensive list of companies that offer semiochemical lures, traps designed for semiochemical monitoring, and commercial systems for behavioral pest control has been compiled by Inscoe [11].Practical applications of semiochemicals in agriculture fall into two main categories, population monitoring and behavioral pest control. The main use at present is in monitoring insect pests with traps baited with semiochemicals, as a part of making decisions about pesticide application or other control techniques. A second use of semiochemicals is the direct prevention of insect damage by a variety of techniques, including the placement of a large number of semiochemical sources that disrupt the behavior of the insects, mass trapping, attracticides (insecticide lures), and enhancement of parasitoid activity.

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Relationships Among Pheromone Trap Catches of Male Corn Earworm Moths (Lepidoptera: Noctuidae), Egg Numbers, and Phenology in Corn

Cited by 16 publications

References 14 publications

Trap Captures of Male <I>Grapholita libertina</I> (Lepidoptera: Tortricidae) Moths: Relationship to Larval Numbers and Damage in Wild Lingonberry<SUP>1</SUP>

Trap Captures of Male <I>Grapholita libertina</I> (Lepidoptera: Tortricidae) Moths: Relationship to Larval Numbers and Damage in Wild Lingonberry<SUP>1</SUP>

Molecular gut-content analysis reveals high frequency of Helicoverpa zea (Lepidoptera: Noctuidae) consumption by Orius insidiosus (Hemiptera: Anthocoridae) in sweet corn

Application of Semiochemicals in Integrated Pest Management Programs

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