Ann Rucker
Rutgers University
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Featured researches published by Ann Rucker.
Ecology and Evolution | 2017
Anne L. Nielsen; Shelby J. Fleischer; George C. Hamilton; Tori Hancock; Gregorz Krawczyk; Jana C. Lee; Emily Ogburn; John M. Pote; Amy Raudenbush; Ann Rucker; Michael C. Saunders; Victoria Skillman; Jeanne Sullivan; Jody Timer; James F. Walgenbach; Nik G. Wiman; Tracy C. Leskey
Abstract Temperature‐based degree‐day models describe insect seasonality and to predict key phenological events. We expand on the use of a temperature‐based process defining timing of reproduction through the incorporation of female reproductive physiology for the invasive pentatomid species Halyomorpha halys, the brown marmorated stink bug. A five‐stage ranking system based on ovary development was able to distinguish between the reproductive statuses of field‐collected females. Application of this ranking method described aspects of H. halys’ seasonality, overwintering biology, and phenology across geographic locations. Female H. halys were collected in the US from NJ, WV, NC, OR, and two sites in PA in 2006–2008 (Allentown, PA only) and 2012–2014. Results identify that H. halys enters reproductive diapause in temperate locations in the fall and that a delay occurs in developmental maturity after diapause termination in the spring. Modification of the Snyder method to identify biofix determined 12.7‐hr photoperiod as the best fit to define initiation of reproduction in the spring. Applying the biofix, we demonstrated significant differences between locations for the rate at which the overwintering generation transition into reproductive status and the factors contributing to this difference require further study. For example, after including abiotic variables influencing development such as temperature and photoperiod (critical diapause cue), reproduction occurred earlier in OR and for an extended period in NJ. This data describe a method to investigate insect seasonality by incorporating physiological development across multiple regions that can clarify phenology for insects with overlapping generations.
Journal of Economic Entomology | 2012
Kris Tollerup; Ann Rucker; Peter W. Shearer
ABSTRACT Fruit orchards in New Jersey are usually isolated from neighboring farms and diversified, often containing separate plantings of peach (Prunus spp.) and apple (Malus spp.). These crops can suffer significant damage from oriental fruit moth, Grapholita molesta (Busck) (Lepidoptera: Tortricidae). This study evaluated the effect of managing G. molesta by using sex pheromone—based mating disruption applied to both peaches and apples (whole-farm mating disruption) rather than treating either crop alone. In year 1 of the experiment, G. molesta mating disruption applied to the adjacent peach and apple blocks provided better control than treating peaches or apples alone. During year 2, treating these adjacent blocks or only treating apples controlled G. molesta equally well. G. molesta populations were so low at the end of year 2 that mating disruption was not applied against this pest during year 3. This allowed us to determine whether applying mating disruption for two consecutive years controlled G. molesta well enough that it eliminated the need mating disruption for three consecutive years. The mean cumulative number of G. molesta captured in plots where both peaches and apples had been treated did not exceed two moths per trap in the third year of this experiment. In contrast, G. molesta capture rebounded during August in peaches and apples that had not been treated with mating disruption the previous 2 yr. Implications for managing G. molesta by using mating disruption as a “whole-farm” tactic as well applying it for two consecutive years and not a third year are discussed.
Arthropod Management Tests | 2017
Anne L. Nielsen; Ann Rucker
Arthropod Management Tests | 2013
Anne L. Nielsen; Ann Rucker
Arthropod Management Tests | 2013
Anne L. Nielsen; Ann Rucker
Arthropod Management Tests | 2012
Ann Rucker; George C. Hamilton
Arthropod Management Tests | 2012
Ann Rucker; George C. Hamilton
Arthropod Management Tests | 2012
Anne L. Nielsen; Ann Rucker
Arthropod Management Tests | 2012
Ann Rucker; George C. Hamilton
Arthropod Management Tests | 2017
Anne L. Nielsen; Ann Rucker