SEASONAL ABUNDANCE OF FOLIAGE-DWELLING INSECT PESTS IN COMMERCIAL FIELDS AND INSECTICIDE-FREE PLOTS OF POTATO IN MANITOBA

1989 ◽  
Vol 121 (3) ◽  
pp. 253-265 ◽  
Author(s):  
D.G. Senanayake ◽  
N.J. Holliday
Keyword(s):  
Leptinotarsa Decemlineata ◽  
Insect Pests ◽  
Flea Beetle ◽  
Seasonal Abundance ◽  
Growing Seasons ◽  
Potato Beetle ◽  
Two Peaks ◽  
Potato Flea Beetle ◽  
Insecticide Sprays ◽  
Aphid Populations

AbstractPatterns of seasonal abundance of Colorado potato beetle, Leptinotarsa decemlineata (Say), potato flea beetle, Epitrix cucumeris (Harris), potato leafhopper, Empoasca fabae (Harris), and aphids on potato cv. Norland are reported for the 1983–1985 growing seasons in southern Manitoba. Each year, Colorado potato beetles and potato flea beetles underwent one generation on the crop. There were two peaks of leafhopper abundance in 1983 and 1984, but only one was evident in 1985. Aphid populations rose to a single peak in August of each year.In experimental plots in the absence of insecticides, Colorado potato beetles completely defoliated plants in two seasons out of the three. In commercial fields, insecticide sprays applied in July and early August greatly reduced populations of Colorado potato beetles for the rest of the season, and there was no defoliation at harvest. Insecticides had less effect on potato flea beetle populations. Leafhopper and aphid populations were small at the time of spraying.

scholarly journals POTENTIAL OF PROTEINASE INHIBITORS FOR THE PRODUCTION OF TRANSGENIC PLANTS TOLERANT TO INSECT PESTS. II. POTENTIAL LIMITATIONS

HortScience ◽  
1994 ◽  
Vol 29 (4) ◽  
pp. 249f-250
Author(s):  
Serge Overney ◽  
Dominique Michaud ◽  
Binh Nguyen-Quoc ◽  
Serge Yelle
Keyword(s):  
Leptinotarsa Decemlineata ◽  
Insect Pests ◽  
Proteinase Inhibitors ◽  
Cysteine Proteinase ◽  
Management Program ◽  
Potato Beetle ◽  
Perillus Bioculatus ◽  
Digestive Proteinases ◽  
Major Pest ◽  
Potential Risks

In recent years, several studies have demonstrated the potential of proteinase inhibitors (PIs) for controlling insect pests. Used as a component of an integrated pest management program, such an approach must, however, be considered with care, given the potential risks of interference on other control approaches. In particular, the effect of PIs on digestive proteinases of beneficial insects must be determined. As an example, this study analyzed the effect of oryzacystatins (OCs), two cysteine PIs isolated from rice, on digestive proteinases of Perillus bioculatus, a predator of the Colorado potato beetle (CPB; Leptinotarsa decemlineata Say), a major pest. Electrophoretic analyses showed the existence of several cysteine proteinase forms in the digestive tract of P. bioculatus. For each developmental stage, OCs dramatically inhibited proteolytic activity, showing an affinity between these inhibitors and the digestive proteinases of the predator. Despite their potential for controlling CPB, the two rice cystatins thus represent possible growth-suppressing compounds for the beneficial insect P. bioculatus. Work is currently under way to assess the compatibility of the two control approaches.

scholarly journals Pathogenicity of Beauveria bassiana isolates toward Leptinotarsa decemlineata [Coleoptera : Chrysomelidae], Myzus persicae [Homoptera : Aphididae] and their predator Coleomegilla maculata lengi [Coleoptera : Coccinellidae]

2005 ◽  
Vol 81 (1) ◽  
pp. 15-22 ◽  
Author(s):  
S.I. Todorova ◽  
D. Coderre ◽  
J.-C. Côté
Keyword(s):  
Beauveria Bassiana ◽  
Myzus Persicae ◽  
Leptinotarsa Decemlineata ◽  
Insect Pests ◽  
Green Peach Aphid ◽  
Coleomegilla Maculata ◽  
Potato Beetle ◽  
Potential Development ◽  
Beauveria Bassiana Isolates ◽  
Highly Virulent

Ten isolates of Beauveria bassiana from different sources and geographical sites were evaluated under laboratory conditions at a concentration of 107 conidia ml-1 for their pathogenicity against two insect pests, the Colorado potato beetle (Leptinotarsa decemlineata) and the green peach aphid (Myzus persicae), and their predator, the spotted ladybird beetle (Coleomegilla maculata lengi). Six isolates were highly virulent to all three insect species. Four others showed different degrees of specificity. The isolates 49, 233 and 210087 were the most interesting for their potential development as biological control agents because they were highly virulent for the two insect pests and caused low mortality in the coccinellid.

scholarly journals Insekticidni proteini in njihova uporaba za zatiranje koloradskega hrošča (Leptinotarsa decemlineata [Say, 1824])

2021 ◽  
Vol 117 (3) ◽  
pp. 1
Author(s):  
Primož ŽIGON ◽  
Jaka RAZINGER ◽  
Stanislav TRDAN
Keyword(s):  
Colorado Potato Beetle ◽  
Leptinotarsa Decemlineata ◽  
Insect Pests ◽  
Plant Protection ◽  
Management Strategies ◽  
Insecticidal Proteins ◽  
Potato Beetle ◽  
Genes Encoding ◽  
Leptinotarsa Decemlineata Say ◽  
Specific Proteins

<p class="042abstractstekst">Plants respond to pest attack, among other mechanisms, by producing specific proteins with insecticidal properties. Proteins with toxic effects on insects have also been discovered in many other organisms, especially fungi and bacteria. Due to their biological function, insecticidal proteins represent an important potential in the development of more environmentally friendly plant protection methods. Increasing knowledge about the mode of action of insecticidal proteins and the identification of genes encoding their synthesis enable the breeding of transgenic plants resistant to insect pests and the development of new bioinsecticidal agents. The Colorado potato beetle (<em>Leptinotarsa decemlineata</em>) is one of the most important pests of potato, so the study of such control methods is crucial for the development of sustainable integrated pest management strategies of potato. This review highlights the properties of some groups of insecticidal proteins and their modes of action, and summarizes examples of studies of their use for the control of Colorado potato beetle.</p>

scholarly journals Identifying Resistance to the Colorado Potato Beetle (Leptinotarsa decemlineata Say) in Potato Germplasm: Review Update

2021 ◽  
Vol 3 ◽  
Author(s):  
Silvia I. Rondon ◽  
Max Feldman ◽  
A. Thompson ◽  
Tiziana Oppedisano ◽  
Govinda Shrestha
Keyword(s):  
Colorado Potato Beetle ◽  
Leptinotarsa Decemlineata ◽  
Plant Traits ◽  
Insect Pests ◽  
Genetic Resistance ◽  
Genetic Material ◽  
Management Program ◽  
Sources Of Resistance ◽  
Potato Germplasm ◽  
Potato Beetle

Developing plant germplasm that contains genetic resistance to insect pests is a valuable component of integrated pest management programs. In the last several decades, numerous attempts have been made to identify genetic sources of resistance to Colorado potato beetle Leptinotarsa decemlineata Say (Coleoptera: Chrysomelidae). This review focuses on compiling information regarding general L. decemlineata biology, ecology, and management focusing on discussing biochemical and morphological potato (Solanum tuberosum L.) plant traits that might be responsible for providing resistance; the review ends discussing past efforts to identify genetic material and highlights promising new strategies that may improve the efficiency of evaluation and selection of resistant material. Measurement strategies, that begin with field screening of segregating populations or wild germplasm to narrow research focus can be useful. Identifying particularly resistant or susceptible germplasm, will help researchers focus on studying the mechanisms of resistance in much greater detail which will help the development of long-term sustainable management program.

scholarly journals AFLP-Based Genetic Linkage Map of the Colorado Potato Beetle Leptinotarsa decemlineata: Sex Chromosomes and a Pyrethroid-Resistance Candidate Gene

Genetics ◽  
2001 ◽  
Vol 158 (2) ◽  
pp. 695-700 ◽  
Author(s):  
David J Hawthorne
Keyword(s):  
Candidate Gene ◽  
Linkage Map ◽  
Colorado Potato Beetle ◽  
Leptinotarsa Decemlineata ◽  
Genetic Linkage ◽  
Genetic Linkage Map ◽  
Sex Chromosome ◽  
Pyrethroid Resistance ◽  
Codominant Markers ◽  
Potato Beetle

Abstract A genetic linkage map was constructed from an intraspecific cross of the Colorado potato beetle, Leptinotarsa decemlineata. This is an initial step toward mapping the loci that underlie important phenotypes associated with insect adaptation to an agroecosystem. The map was made with 172 AFLP and 10 anonymous codominant markers segregating among 74 backcross (BC1) individuals. Markers were mapped to 18 linkage groups and a subset of the markers with a mean intermarker distance of 11.1 cM is presented. A pyrethroid-resistance candidate gene, LdVssc1, was placed onto the map as well. The sex chromosome was identified by exploiting the XO nature of sex determination in this species using patterns of variation at LdVssc1 and the codominant markers.

Population-associated heterogeneity of the digestive Cys protease complement in Colorado potato beetle, Leptinotarsa decemlineata

2018 ◽  
Vol 106 ◽  
pp. 125-133 ◽  
Author(s):  
Asieh Rasoolizadeh ◽  
Marie-Claire Goulet ◽  
Jean-Frédéric Guay ◽  
Conrad Cloutier ◽  
Dominique Michaud
Keyword(s):  
Colorado Potato Beetle ◽  
Leptinotarsa Decemlineata ◽  
Potato Beetle
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