Lisa G Neven - Academia.edu (original) (raw)

Papers by Lisa G Neven

Journal of insect science, Jul 1, 2017

Codling moth (Cydia pomonella L.) is an internal feeding pest of apples and can cause substantial... more Codling moth (Cydia pomonella L.) is an internal feeding pest of apples and can cause substantial economic losses to fruit growers due to larval feeding which in turn degrades fruit quality and can result in complete crop loss if left uncontrolled. Although this pest originally developed in central Asia, it was not known to occur in China until 1953. For the first three decades the spread of codling moth within China was slow. Within the last three decades, addition of new commercial apple orchards and improved transportation, this pest has spread to over 131 counties in seven provinces in China. We developed regional (China) and global ecological niche models using MaxEnt to identify areas at highest potential risk of codling moth establishment and spread. Our objectives were to 1) predict the potential distribution of codling moth in China, 2) identify the important environmental factors associated with codling moth distribution in China, and 3) identify the different stages of invasion of codling moth in China. Human footprint, annual temperature range, precipitation of wettest quarter, and degree days 10 C were the most important predictors associated with codling moth distribution. Our analysis identified areas where codling moth has the potential to establish, and mapped the different stages of invasion (i.e., potential for population stabilization, colonization, adaptation, and sink) of codling moth in China. Our results can be used in effective monitoring and management to stem the spread of codling moth in China.

Hortscience, Feb 1, 2008

Organic production of pome and stone fruits in the United States has greatly increased during the... more Organic production of pome and stone fruits in the United States has greatly increased during the past few years. To compete and enter lucrative export markets, these fruit must meet stringent quarantine requirements. For some countries, these requirements dictate that the fruit crops must be treated with a synthetic chemical fumigant, which is not compliant with organic standards. Therefore, nonchemical quarantine treatments for organically produced pome and stone fruits have been developed using the Controlled Atmosphere/Temperature Treatment System (or CATTS) technology. This technology applies a short-term heat treatment under a low-O 2 /high-CO 2 environment, and is effective in controlling the most prominent quarantine insect pests while maintaining commodity quality. The technology has progressed beyond laboratory-scale research units to 1-to 2-ton commercial units. The development of these treatments and their effect on both insect mortality and commodity quality are discussed.

Proceedings of the National Academy of Sciences of the United States of America, Apr 8, 2013

Environmental Entomology, Feb 17, 2018

The oriental fruit moth, Grapholita molesta (Busck) (Lepidoptera: Tortricidae), is a primary pest... more The oriental fruit moth, Grapholita molesta (Busck) (Lepidoptera: Tortricidae), is a primary pest of stone fruits that cause significant economic damage. Larvae, which enter the host plant through shoot tips, damage shoots, and ripe fruits. Native to Asia, this pest now occurs in many fruit-growing countries, including the United States and Canada. Though the pest was previously reported from many states within the United States, its current distribution and the environmental variables that influence its distribution are not properly identified. The objectives of this study were to 1) identify the environmental factors associated with G. molesta current distribution, 2) predict the current distribution of G. molesta in Washington State (WA) using Maxent and Climex models, 3) identify those areas within WA best suited for establishment of pest free zones, areas of low pest prevalence, and pest free production areas, and 4) identify regions most at risk for further expansion of G. molesta populations as a function of climate change. The current models predicted a small portion of central WA is suitable to support G. molesta, which is consistent with observed distributions. However, climate change models predict that more areas will become suitable for the pest. These results indicate that action should be taken to monitor and reduce current populations of G. molesta to stem its potential expansion into the major commercial tree fruit production areas in the state.

Journal of Economic Entomology, Feb 1, 2013

The potential presence of codling moth, Cydia pomonella L., in apples shipped to countries within... more The potential presence of codling moth, Cydia pomonella L., in apples shipped to countries within the 30th latitudes has raised concerns that this pest could establish and spread in these countries. Previous research demonstrated that codling moth in apples handled under simulated commercial cold storage conditions and held under short day lengths could not break diapause and emerge in sufÞcient numbers to establish a minimum viable population. This study expands the in-fruit work by examining the ability of codling moth to establish a laboratory population under a short photoperiod of 12:12 (L:D) h, as compared with a long photoperiod of 16:8 (L:D) h. Codling moth larvae were collected from Þeld infested fruits in 2010 and 2011. Moths were collected from the infested fruits and separated into two groups representing the two daylength conditions. In total, 1,004 larvae were monitored for adult emergence and ability to generate a subsequent population. Larvae held under the photoperiod of 12:12 (L:D) h generated only one moth in the 2 yr period, whereas larvae held under the photoperiod of 16:8 (L:D) h generated 186 females and 179 males, that sustained subsequent generations on artiÞcial diet under laboratory conditions. These results indicate that under controlled environmental conditions, codling moth cannot complete diapause and emerge in sufÞcient numbers to sustain a viable population when held under a short photoperiod.

Journal of Economic Entomology, Oct 3, 2019

Native to Asia, the spotted lanternfly, Lycorma delicatula (White), is an emerging pest of many c... more Native to Asia, the spotted lanternfly, Lycorma delicatula (White), is an emerging pest of many commercially important plants in Korea, Japan, and the United States. Determining its potential distribution is important for proactive measures to protect commercially important commodities. The objective of this study was to assess the establishment risk of L. delicatula globally and in the United States using the ecological niche model MAXENT, with a focus on Washington State (WA), where large fruit industries exist. The MAXENT model predicted highly suitable areas for L.

Journal of insect science, Jun 23, 2015

The western cherry fruit fly is an economically important pest of sweet cherries in the western U... more The western cherry fruit fly is an economically important pest of sweet cherries in the western United States. The potential of this pest to establish and spread in areas in which it is not currently present has been the focus of recent research. Most published information on the thermal tolerance and optimal thermal range of this pest has focused primarily on the diapausing pupae and predictive phenology models. Microrespirometry and differential calorimetry can be useful tools in describing the thermotolerance and optimal thermal range of insects. This methodology was employed to investigate the effects of western cherry fruit fly adult age on the optimal thermal range. Newly emerged flies exhibited the widest optimal thermal range spanning from 6.6 to 42.2 C for a total range of 35.8 C during heating scans of 0.4 C/min from 2 to 50 C. This range diminished as the flies aged, with the shortest span observed with 28-d-old flies ranging from 10.5 to 37.8 C, a span of 27.2 C. Measurements of heat rate and oxygen consumption at isothermal, or static, temperatures indicated that all flies could survive exposure to 40 C for at least 20 min, and that metabolism was greatly reduced, with a concomitant reduction in oxygen consumption rate at 40 to 42 C. All flies exhibited a heat rate and oxygen consumption rate of zero when exposed to 45 and 50 C. The loss of thermotolerance in adult flies can influence its ability to establish and spread in climates where daily temperatures exceed the optimal thermal range of this species.

Environmental Entomology, Apr 2, 2021

The apple maggot fly, Rhagoletis pomonella (Walsh) (Diptera: Tephritidae), is a serious pest of a... more The apple maggot fly, Rhagoletis pomonella (Walsh) (Diptera: Tephritidae), is a serious pest of apple in North America that is subject to quarantine measures to prevent its spread to currently pest-free regions, including the tropics. How the fly may survive in warmer climates is unclear. Here, we studied the effects of exposing postchill puparia to simulated temperate and tropical environmental conditions on eclosion of R. pomonella from Washington State, U.S.A. Puparia were chilled for 0-30 wk at 3°C and then held under four postchill conditions:

PLOS ONE, Jun 3, 2019

Well-adapted and abundant insect pests can negatively affect agricultural production. We modeled ... more Well-adapted and abundant insect pests can negatively affect agricultural production. We modeled the abundance of two Rhagoletis fly (Diptera: Tephritidae) pests, apple maggot fly, Rhagoletis pomonella (Walsh), and western cherry fruit fly, Rhagoletis indifferens Curran, in Washington State (WA), U.S.A. using biologically relevant environmental variables. We tested the hypothesis that abundance of the two species is influenced by different environmental variables, based on the fact that these two species evolved in different environments, have different host plants, and that R. pomonella is an introduced pest in WA while R. indifferens is native. We collected data on fly and host plant abundance at 61 randomly selected sites across WA in 2015 and 2016. We obtained land-cover, climate, and elevation data from online sources and used these data to derive relevant landscape variables and modeled fly abundance using generalized linear models. For R. pomonella, relatively high winter mean minimum temperature, low elevation, and developed land-cover were the top variables positively related to fly abundance. In contrast, for R. indifferens, the top variables related to greater fly abundance were high Hargreaves climatic moisture and annual heatmoisture deficits (indication of drier habitats), high host plant abundance, and developed land-cover. Our results identify key environmental variables driving Rhagoletis fly abundance in WA and can be used for understanding adaptation of insects to non-native and native habitats and for assisting fly quarantine and management decisions.

Journal of Economic Entomology, Apr 1, 2012

Codling moth, Cydia pomonella L., is a cosmopolitan pest of pome and stone fruits. It has been id... more Codling moth, Cydia pomonella L., is a cosmopolitan pest of pome and stone fruits. It has been identiÞed as a quarantine pest of concern in a number of countries where it is not known to occur, most of them tropical or subtropical countries. Although considerable work has been done on the basic biology and physiology of this temperate pest, little is known on its potential to develop and establish in tropical environments with short photoperiods and few to no days below 10ЊC. Apples were harvested over three Þeld seasons (2007Ð2009) from unmanaged orchards in central Washington State and subjected to simulated commercial cold storage at 1.1 Ϯ 2ЊC for up to 119 d. After cold storage, infested fruits were held at 20ЊC under a 12:12 L:D photoperiod for up to 6 mo. Over the entire experiment only 27% of the larvae collected exited the fruit and cocooned. Of those 27%, only 1.06% of larvae held under a 12:12 L:D photoperiod successfully emerged as moths. No moths emerged when host fruit would be available in a representative importing country in the tropics over the 3 yr of testing. These results indicate that codling moth in apples from the PaciÞc Northwest pose little threat of surviving and establishing in tropical regions where daylength is insufÞcient to break diapause and the chilling requirement is not met.

![Research paper thumbnail of 131 Controlled Atmosphere Temperature Treatments for Disinfestation of `Bing' Sweet Cherry](https://attachments.academia-assets.com/120111474/thumbnails/1.jpg)

Hortscience, Jun 1, 2000

To determine when a paper is to be presented, check the session number in the Program Schedule or... more To determine when a paper is to be presented, check the session number in the Program Schedule or the Conference at a Glance charts. The Author presenting the paper is indicated by an asterisk. 38 POSTER SESSION 1 (Abstr. 001-011) Crop Protection Monday, 24 July, 1:00-2:00 p.m. 001 Viruses Associated to Alstroemeria Varieties and Epidemiology of Tomato Spotted Wilt in cv. 'Rosario'

Annual Review of Entomology, 2006

With world trade in agricultural commodities increasing, the introduction of exotic insects into ... more With world trade in agricultural commodities increasing, the introduction of exotic insects into new areas where they become pests will increase. The development and application of quarantine treatments or other mitigation approaches to prevent pest introduction in traded commodities raise many research and regulatory issues. The probit 9 standard for quarantine treatment efficacy has given way to riskbased alternatives. Varietal testing may have merit for some treatments or commodities but not for others. Development of generic treatments to control broad groups of insects or insects in all commodities can expedite new trade in agricultural products. Area-wide pest management programs lower pest levels before harvest and improve the quarantine security provided by any postharvest treatments. Systems approaches capitalize on cumulative pest mortality from multiple control components to achieve quarantine security in an exported commodity. Certain quarantine treatment technologies such as irradiation are not universally accepted, which is slowing their adoption. Standardized phytosanitary measures and research protocols are needed to improve the flow of information when countries propose to trade in a regulated commodity.

Entomologia Experimentalis Et Applicata, Feb 16, 2012

Hortscience, Aug 1, 2005

Yellow-and white-fl eshed peach [Prunus persica (L.) Batsch] and nectarine [Prunus persica (L.) B... more Yellow-and white-fl eshed peach [Prunus persica (L.) Batsch] and nectarine [Prunus persica (L.) Batsch var. nectarina (Ait) Maxim.] cultivars of mid-and late-season maturity classes were subjected to combined controlled atmosphere-temperature treatment system (CATTS) using heating rates of either 12 °C/hour (slow rate) or 24 °C/hour (fast rate) with a fi nal chamber temperature of 46 °C, while maintaining a controlled atmosphere (CA) of 1 kPa oxygen and 15 kPa carbon dioxide. Fruit seed surface temperatures generally reached 45 °C within 160 minutes and 135 minutes for the slow and fast heating rate, respectively. The total duration of the slow heating rate treatment was 3 hours, while 2.5 h was required for the fast heating rate treatment. Following treatment the fruit were stored at 1 °C for either 1, 2, or 3 weeks followed by a ripening period of 2 to 4 d at 23 °C and subsequent evaluation of fruit quality. Fruit quality was similar for both heating rate treatments. Compared with the untreated controls, CATTS fruit displayed higher amounts of surface injury, although increased injury was only an important factor to marketability in cultivars that had high amounts of surface injury before treatment. The percentage of free juice in the fl esh was slightly less in CATTS fruit early in storage but was often greater in treated fruit toward the end of the storage period. Slower rates of softening during fruit ripening were apparent in CATTS fruit. Soluble solids, acidity, weight loss and color all were either not affected or changed to a very small degree as a result of CATTS. Members of a trained sensory panel preferred the taste of untreated fruit over fruit that had been CATTS but the ratings of treated and nontreated fruit were generally similar and it is unclear whether an average consumer could detect the difference. Although further work needs to be done regarding the infl uence of CATTS on taste, it otherwise appears that CATTS does not adversely affect the marketability of good quality fruit and therefore shows promise as a nonchemical quarantine treatment for peaches and nectarines.

Journal of Agricultural and Food Chemistry, 1998

Temperature extremes are being investigated as an alternative method for postharvest control of q... more Temperature extremes are being investigated as an alternative method for postharvest control of quarantined insects. This study examined the heat shock response of cherry fruit under conditions that effectively destroy pests. Five different antibodies against members of the 70-kDa heat shock protein (HSP70) family were used to investigate the heat shock responses of treated cherry fruits. Western blots of total protein extracts revealed constitutive expression of heat shock cognate (HSC70) proteins. Each antibody recognized a pair of constitutively expressed HSC70 proteins that varied in size and relative abundance. Cherries subjected to heat treatment for 1 h at 45°C followed by transfer to cold storage (0°C) contained a 70-kDa polypeptide recognized by all of the antibodies used. In heat-treated fruits this induced polypeptide appeared at 12 h after heat treatment, disappeared by 24 h following treatment, and reappeared after 2 weeks in cold storage (0°C). Cold storage alone did not alter constitutive expression or induce novel polypeptides recognized by anti-HSP70 antibodies. Thirty minutes or more of treatment at 45°C was required to elicit the appearance of the 70-kDa polypetide recognized by all of the anti-HSP70 antibodies used.

Frontiers in Insect Science

How different macronutrients are utilized at various stages of pupal diapause and the effects of ... more How different macronutrients are utilized at various stages of pupal diapause and the effects of winter length on nutrient reserves remain poorly studied for most insects. Western cherry fruit fly, Rhagoletis indifferens (Diptera: Tephritidae), is a specialist on cherries in higher latitudes or elevations in western North America that exhibits a obligate pupal diapause requiring chilling before adult development can occur. We determined the relationship between metabolic reserves and diapause status in R. indifferens pupae, testing the hypotheses that lipids are the primary reserves utilized during diapause and that long periods of warmth deplete these reserves more than periods of cold. Effects of 0- to 20-week durations at 3°C and subsequent exposure to 23°C and 16:8 L:D (warm rearing conditions) for 0 to 7 weeks on lipid, protein, soluble carbohydrates, and glycogen reserves of R. indifferens pupae were determined. During diapause, lipid reserves were the primary source of energy...

Journal of Economic Entomology

Climate change is expected to alter pressure from insect pests and the abundance and effectivenes... more Climate change is expected to alter pressure from insect pests and the abundance and effectiveness of insect pollinators across diverse agriculture and forestry systems. In response to warming, insects are undergoing or are projected to undergo shifts in their geographic ranges, voltinism, abundance, and phenology. Drivers include direct effects on the focal insects and indirect effects mediated by their interactions with species at higher or lower trophic levels. These climate-driven effects are complex and variable, sometimes increasing pest pressure or reducing pollination and sometimes with opposite effects depending on climatic baseline conditions and the interplay of these drivers. This special collection includes several papers illustrative of these biological effects on pests and pollinators. In addition, in response to or anticipating climate change, producers are modifying production systems by introducing more or different crops into rotations or as cover crops or intercr...

Environmental Entomology, 2020

Western cherry fruit fly, Rhagoletis indifferens Curran, is a quarantine pest of sweet cherries i... more Western cherry fruit fly, Rhagoletis indifferens Curran, is a quarantine pest of sweet cherries in the Pacific Northwest of the United States that overwinters as diapausing pupae. Eclosion responses of R. indifferens puparia to different low temperature durations and postdiapause conditions affect the pest status of the fly. Here, we determined the effects of holding R. indifferens puparia at 3°C for 0, 1, 2, 5, 10, 15, and 20 wk on adult eclosion times and rates at two simulated temperate and two simulated tropical climate treatments over 40 wk. When puparia were chilled 0, 1, or 2 wk, adult eclosion across the four climate treatments displayed a bimodal distribution with low eclosion at 3 wk and high eclosion at 23–35 wk. When puparia were chilled ≤ 10 wk, there was a weaker bimodal distribution. However, when puparia were chilled 15–30 wk, eclosion was more synchronous and occurred at 5–7 wk across the four postchill climate treatments. Eclosion was greater at a postdiapause temp...