Seasonal Population Dynamics of Potato Psyllid (Hemiptera: Triozidae) in the Columbia River Basin

2020 ◽  
Vol 49 (4) ◽  
pp. 974-982
Author(s):  
Abigail L Cohen ◽  
Carrie H Wohleb ◽  
Silvia I Rondon ◽  
Kylie D Swisher Grimm ◽  
Isabel Cueva ◽  
...  
Keyword(s):  
Population Dynamics ◽  
Population Growth ◽  
Abiotic Factors ◽  
Insect Pest ◽  
Pest Species ◽  
Potato Psyllid ◽  
Bactericera Cockerelli ◽  
Weather Patterns ◽  
Degree Day ◽  
Seasonal Weather

Abstract Understanding factors that affect the population dynamics of insect pest species is key for developing integrated pest management strategies in agroecosystems. Most insect pest populations are strongly regulated by abiotic factors such as temperature and precipitation, and assessing relationships between abiotic conditions and pest dynamics can aid decision-making. However, many pests are also managed with insecticides, which can confound relationships between abiotic factors and pest dynamics. Here we used data from a regional monitoring network in the Pacific Northwest United States to explore effects of abiotic factors on populations of an intensively managed potato pest, the potato psyllid (Bactericera cockerelli Šulc), which can vector Candidatus Liberibacter psyllaurus, a bacterial pathogen of potatoes. We assessed effects of temperature on psyllid populations, and show psyllid population growth followed predictable patterns within each year, but there was considerable variation across years in psyllid abundance. Examination of seasonal weather patterns suggested that in 2017, when psyllid populations were less abundant by several orders of magnitude than other years, a particularly long and cold period of winter weather may have harmed overwintering populations and limited population growth. The rate of degree-day accumulation over time, as well as total degree-day accumulation also affected trap catch abundance, likely by mediating the number of psyllid generations per season. Our findings indicate that growers can reliably infer the potential magnitude of risk from potato psyllids using monitoring data, date of first detection, seasonal weather patterns, and population size early in the growing season.

scholarly journals Sulphur reduces egglaying in laboratory trials with tomato potato psyllid (Bactericera cockerelli)

2013 ◽  
Vol 66 ◽  
pp. 386-386
Author(s):  
R. Gardner-Gee
Keyword(s):  
New Zealand ◽  
Settlement Patterns ◽  
Insect Pests ◽  
Pest Species ◽  
Potato Psyllid ◽  
Bactericera Cockerelli ◽  
Laboratory Studies ◽  
Candidatus Liberibacter ◽  
Assay Design ◽  
Whole Plants

Sulphur is mainly used as a fungicide but is known to have insecticidal properties against some insect pests A series of laboratory studies was conducted to assess its effect on the tomato potato psyllid (Bactericera cockerelli; TPP) a recently established pest species in New Zealand that transmits the bacterium Candidatus Liberibacter solanacearum (Lso) Short assays (8805; 24 h) using dipped leaves indicated that fresh sulphur residues had no discernible impact on TPP settlement patterns or onleaf behaviour However longer assays (8805; 72 h) using whole plants indicated that sulphur residues can disrupt egglaying behaviour but the effect was dependent on the assay design In 72 h choice assays TPP laid fewer eggs on plants sprayed with sulphur compared with control plants In nochoice assays sulphur residues did not consistently reduce egglaying Together these results suggest that sulphur may slow the buildup of TPP populations within crops by deterring egglaying However the lack of repellence or antifeeding properties means that sulphur treatments alone may not be sufficient to prevent the transmission of Lso by TPP

scholarly journals Biorational insecticides for control of the tomato potato psyllid

2013 ◽  
Vol 66 ◽  
pp. 333-340 ◽  
Author(s):  
N. Jorgensen ◽  
R.C. Butler ◽  
J. Vereijssen
Keyword(s):  
Insect Pest ◽  
Field Trials ◽  
Control Measures ◽  
Potato Psyllid ◽  
Control Methods ◽  
Bactericera Cockerelli ◽  
Insect Pest Control ◽  
Beneficial Insects ◽  
Potato Crops ◽  
Laboratory Bioassays

Since its discovery in 2006 the tomato potato psyllid Bactericera cockerelli (ulc) (TPP) has been considered a significant pest of solanaceous crops in New Zealand resulting in an intensification of insect pest control measures often with the use of broadspectrum insecticides In the search for more sustainable control methods in outdoor potato crops several biorational insecticides were tested in laboratory bioassays to assess their effects on TPP behaviour and mortality The products tested were Organic JMS StyletOil Excel Oil EcoOil Neem 600 WP and Sap Sucker Plus Given the efficacy of JMS Stylet Oil Sap Sucker Plus and Excel Oil at reducing TPP numbers and their probing/feeding deterrent qualities these products are now being tested in a field trial The impacts of the tested biorational insecticides on beneficial insects are also being assessed in laboratory and field trials

scholarly journals A survey of Maori potato (taewa) seed tubers for the presence of Candidatus Liberibacter solanacearum

2013 ◽  
Vol 66 ◽  
pp. 356-364
Author(s):  
A.J. Puketapu ◽  
R. Gardner-Gee ◽  
L.K. Tooman ◽  
S.S. Beard
Keyword(s):  
Solanum Tuberosum L ◽  
Insect Pest ◽  
Potato Psyllid ◽  
Bactericera Cockerelli ◽  
Disease Symptoms ◽  
Greenhouse Trial ◽  
Seed Tubers ◽  
Seed Sources ◽  
Candidatus Liberibacter ◽  
Potato Yields

Taewa (Solanum tuberosum L) production is threatened by a new insect pest the tomato potato psyllid (Bactericera cockerelli Sulc) and the bacterium (Candidatus Liberibacter solanacearum (Lso)) vectored by the psyllid Lso is known to reduce potato yields and can infect seed tubers but less is known for taewa specifically In this study tubers from 17 taewa lines were tested for Lso using a qPCR assay grown in a greenhouse and assessed for symptoms of tuberborne Lso Lso was detected by qPCR in three tubers The Lsopositive tubers were from three lines from two North Island seed sources; no Lso was detected in the seven South Island lines tested In the greenhouse trial two of the three Lsopositive tubers emerged and one grew normally The greenhouse trial detected disease symptoms associated with Lso in several other lines but other potato viruses and diseases cause similar symptoms and this area needs further study

scholarly journals Effect of Climate Change on Introduced and Native Agricultural Invasive Insect Pests in Europe

Insects ◽  
2021 ◽  
Vol 12 (11) ◽  
pp. 985
Author(s):  
Sandra Skendžić ◽  
Monika Zovko ◽  
Ivana Pajač Živković ◽  
Vinko Lešić ◽  
Darija Lemić
Keyword(s):  
Climate Change ◽  
Biological Invasion ◽  
Insect Pests ◽  
Abiotic Factors ◽  
Insect Pest ◽  
Diet Breadth ◽  
Economic Damage ◽  
Pest Species ◽  
Invasive Insects ◽  
Factors Affecting

Climate change and invasive species are major environmental issues facing the world today. They represent the major threats for various types of ecosystems worldwide, mainly managed ecosystems such as agriculture. This study aims to examine the link between climate change and the biological invasion of insect pest species. Increased international trade systems and human mobility have led to increasing introduction rates of invasive insects while climate change could decrease barriers for their establishment and distribution. To mitigate environmental and economic damage it is important to understand the biotic and abiotic factors affecting the process of invasion (transport, introduction, establishment, and dispersal) in terms of climate change. We highlight the major biotic factors affecting the biological invasion process: diet breadth, phenological plasticity, and lifecycle strategies. Finally, we present alien insect pest invasion management that includes prevention, eradication, and assessment of the biological invasion in the form of modelling prediction tools.

scholarly journals Seasonal Population Patterns of a New Scale Pest, Acanthococcus lagerstroemiae Kuwana (Hemiptera: Sternorrhynca: Eriococcidae), of Crapemyrtles in Texas, Louisiana, and Arkansas.1

2020 ◽  
Vol 38 (1) ◽  
pp. 8-14
Author(s):  
Erfan Vafaie ◽  
Michael Merchant ◽  
Cai Xiaoya ◽  
John D. Hopkins ◽  
James A. Robbins ◽  
...  
Keyword(s):  
Population Dynamics ◽  
Insect Pest ◽  
Scale Insect ◽  
Apparent Difference ◽  
Little Rock ◽  
Degree Day ◽  
Insect Population Dynamics ◽  
Activity Difference ◽  
Sticky Tape ◽  
Seasonal Population

Abstract The crapemyrtle bark scale, Acanthococcus lagerstroemiae, is an invasive scale insect pest of crapemyrtles. Crawler populations were monitored using double-sided sticky tape on established crapemyrtle trees in Tyler (TX), Huntsville (TX), Dallas (TX), College Station (TX), Shreveport (LA), and Little Rock (AR) from 2015 - 2017 to determine crawler activity and determine if degree-day models could predict the first peak in crawler activity. Difference in crawler densities on upper and lower branches of trees was also determined by using double-sided sticky tapes. The first peak in crapemyrtle bark scale crawler activity was between March 26th and May 22nd across all locations and years, with multiple subsequent peaks per season frequently found, suggesting multiple generations. Using the average date (May 2nd) to predict the first peak crawler activity resulted in the lowest variance and was subsequently considered a better predictor compared to any degree-day model. There was no apparent difference in crawler activity between upper and lower branches of crapemyrtle trees across an entire season. This study provides the first set of population dynamics data for crapemyrtle bark scale in the U.S. and will help with future bark scale management decisions. Index words:, Crapemyrtle bark scale, invasive insect, population dynamics, Lagerstroemia spp Species used in this study: Crapemyrtle bark scale (Acanthococcus lagerstroemiae Kuwana); Crapemyrtle (Lagerstroemia spp.)

scholarly journals Population Dynamics of Six Major Insect Pests During Multiple Crop Growing Seasons in Northwestern New Mexico

Insects ◽  
2019 ◽  
Vol 10 (11) ◽  
pp. 369 ◽  
Author(s):  
Djaman ◽  
Higgins ◽  
O’Neill ◽  
Begay ◽  
Koudahe ◽  
...  
Keyword(s):  
Population Dynamics ◽  
Spodoptera Frugiperda ◽  
Trichoplusia Ni ◽  
Helicoverpa Zea ◽  
Spodoptera Exigua ◽  
Insect Pests ◽  
Potato Psyllid ◽  
Bactericera Cockerelli ◽  
Commercial Farm ◽  
Striacosta Albicosta

This study was conducted to monitor the population dynamics of six major insect pests at the NMSU Agricultural Science Center at Farmington (ASC-Farmington) and within an adjacent commercial farm (Navajo Agricultural Products Industry, NAPI) for more effective and efficient pest management during the 2013–2019 period. Specific pheromone traps, sticky and net traps were used to collects moths of beet armyworm (Spodoptera exigua), cabbage looper (Trichoplusia ni), corn earworm (Helicoverpa zea), fall armyworm (Spodoptera frugiperda), potato psyllid (Bactericera cockerelli), and western bean cutworm (Striacosta albicosta). These insects generally appear in early June and their population decreases toward the end of August/early September with different peak times and magnitudes during July and August. Bactericera cockerelli was not substantially present in the commercial farm due to intensive insecticide application. Overall, all six insect species were present at ASC-Farmington, with relative abundance, in percent of the total collected moths by all traps, varying from 6.5 to 19% for Trichoplusia ni, 16 to 29.2% for Spodoptera exigua, 1.5 to 20.6% for Striacosta albicosta, 10 to 25% for Helicoverpa zea, 18.5 to 25.6% for Spodoptera frugiperda and 8.5 to 26.9% for Bactericera cockerelli. In NAPI’s commercial field, while the potato psyllid Bactericera cockerelli was not recorded, Trichoplusia ni and Spodoptera exigua showed decreasing rates that varied from 27.5 to 4.2% and from 49.3 to 7.8%, respectively. Striacosta albicosta, Helicoverpa zea and Spodoptera exigua showed increasing rates varying from 2.9 to 28%, from 7.8 to 25.3% and from 10.9 to 52%, respectively. The results of this study could serve as a guideline for sustainable management strategies for each of the six species for production profitability.

scholarly journals Potential for Acanthoscelides obtectus to Adapt to New Hosts Seen in Laboratory Selection Experiments

Insects ◽  
2019 ◽  
Vol 10 (6) ◽  
pp. 153
Author(s):  
Uroš Savković ◽  
Mirko Đorđević ◽  
Biljana Stojković
Keyword(s):  
Population Dynamics ◽  
Population Growth ◽  
Host Plant ◽  
Mung Bean ◽  
Good Practice ◽  
Pest Species ◽  
Acanthoscelides Obtectus ◽  
New Host ◽  
Important Species ◽  
Laboratory Selection

Effective pest management strategies for a targeted pest species must rely on accurate, reliable and reproducible estimates of population dynamics. Importance of such approaches is even more conspicuous when assessing pest’s potential to utilize other stored products. Using an experimental evolution approach, we have focused our attention on a common bean pest, the seed beetle (Acanthoscelides obtectus). We looked into the potential to invade and sustain population growth on two suboptimal host plants (chickpeas and mung beans). Such an approach simulates steps of the host-shift process in storages. By analyzing population dynamics during initial encountering with a new host plant, we detected a population drop for both novel hosts. However, transgenerational development in a novel environment resulted in a constant population growth in chickpeas, but not in mung bean populations. Reversal of chickpea selected populations to original host plant has led to a severe decrease in population parameters due to low viability of immatures, while the opposite trend was detected in mung bean populations. This paper highlights the importance of good practice in estimating population dynamics for economically important species. With special emphasis on storage pest species, we discuss how this approach can be useful for estimating invading potential of pest insects.

Modelling the tri-trophic population dynamics of a host crop (Triticum aestivum; Poaceae), a major pest insect (Sitodiplosis mosellana; Diptera: Cecidomyiidae), and a parasitoid of the pest species (Macroglenes penetrans; Hymenoptera: Pteromalidae): a cohort-based approach incorporating the effects of weather

2020 ◽  
Vol 152 (3) ◽  
pp. 311-329 ◽  
Author(s):  
O. Olfert ◽  
R.M. Weiss ◽  
M. Vankosky ◽  
S. Hartley ◽  
J.F. Doane
Keyword(s):  
Population Dynamics ◽  
Insect Pest ◽  
Simulation Models ◽  
Life Cycles ◽  
Pest Species ◽  
Management Options ◽  
Sitodiplosis Mosellana ◽  
Wheat Midge ◽  
Major Pest ◽  
Trophic Analysis

AbstractThis paper describes a tri-trophic analysis of the ecological dynamics of a crop, an insect pest, and a natural enemy of the insect pest. Worldwide wheat (Triticum Linnaeus) (Poaceae) production in 2018–2019 was estimated at over 700 million metric tons in 2018–2019. Wheat midge, Sitodiplosis mosellana (Géhin) (Diptera: Cecidomyiidae), a serious insect pest of wheat, is widely distributed in many parts of the world where wheat production occurs. Macroglenes penetrans (Kirby) (Hymenoptera: Pteromalidae), a parasitoid of S. mosellana, has successfully established in most wheat midge-infested areas. Mechanistic, or process-based, population models were used in this study to assess the interactive population dynamics of the three species, based on their respective life cycles and meteorological factors. The models were validated with survey data from multiple sites over numerous years (1991–2016). These simulation models helped to detail our understanding of the tri-trophic population dynamics and will help guide pest management decisions both prior to the growing season and until wheat heading, when wheat is no longer susceptible to S. mosellana. The associated models also help identify gaps in system knowledge, provide a foundation for evaluating future innovative management options, and evaluate the potential impact of a changing climate.

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