scholarly journals Efficacy of the Applied Natural Enemies on the Survival of Colorado Potato Beetle Adults

Insects ◽  
2021 ◽  
Vol 12 (11) ◽  
pp. 1030
Author(s):  
Vladimír Půža ◽  
Jiří Nermuť ◽  
Jana Konopická ◽  
Oxana Skoková Habuštová
Keyword(s):  
Emerging Adults ◽  
Natural Enemies ◽  
Colorado Potato Beetle ◽  
Leptinotarsa Decemlineata ◽  
Entomopathogenic Fungus ◽  
Entomopathogenic Nematodes ◽  
Field Application ◽  
Fungal Treatment ◽  
Potato Plants ◽  
Potato Beetle

Colorado potato beetle Leptinotarsa decemlineata is among the most destructive pests of potatoes quickly developing resistance to traditional insecticides. In the present study, we tested the effect of various species and strains of entomopathogenic nematodes on CPB adults, and subsequently, the most effective nematodes were applied alone and in combination with entomopathogenic fungus B. bassiana in pots with potato plants and in the field and their effect on the number of emerging adults was evaluated. In the experimental infections, both the nematode invasion and pathogenicity were variable, and, in several strains, the mortality reached 100%. In pot experiments, soil application of nematodes S. carpocapsae 1343 and S. feltiae Jakub and fungus significantly decreased numbers of emerging CPB adults, while, after the application on leaves, only fungal treatment was effective. The field application of fungus B. bassiana significantly decreased the number of emerging CPB adults in comparison to control sites by ca. 30% while the effect of nematodes and the nematodes–fungus combination was not significant. In conclusion, we demonstrate the necessity of thorough bioassays to select the most effective nematode strains. Entomopathogenic nematodes have the potential to effectively decrease the emergence of CPB adults, but further research is needed to improve the effectiveness in the field.

scholarly journals Transcriptomics-Based Approach Identifies Spinosad-Associated Targets in the Colorado Potato Beetle, Leptinotarsa decemlineata

Insects ◽  
2020 ◽  
Vol 11 (11) ◽  
pp. 820
Author(s):  
Pierre Bastarache ◽  
Gabriel Wajnberg ◽  
Pascal Dumas ◽  
Simi Chacko ◽  
Jacynthe Lacroix ◽  
...  
Keyword(s):  
Colorado Potato Beetle ◽  
Leptinotarsa Decemlineata ◽  
Insect Pest ◽  
Molecular Targets ◽  
Primary Method ◽  
Juvenile Hormone Esterase ◽  
Potato Plants ◽  
Potato Beetle ◽  
Potato Crops ◽  
Generation Sequencing

The Colorado potato beetle Leptinotarsa decemlineata is an insect pest that threatens potato crops globally. The primary method to control its damage on potato plants is the use of insecticides, including imidacloprid, chlorantraniliprole and spinosad. However, insecticide resistance has been frequently observed in Colorado potato beetles. The molecular targets and the basis of resistance to imidacloprid and chlorantraniliprole have both been previously quantified. This work was undertaken with the overarching goal of better characterizing the molecular changes associated with spinosad exposure in this insect pest. Next-generation sequencing was conducted to identify transcripts that were differentially expressed between Colorado potato beetles exposed to spinosad versus control insects. Results showed several transcripts that exhibit different expression levels between the two conditions, including ones coding for venom carboxylesterase-6, chitinase 10, juvenile hormone esterase and multidrug resistance-associated protein 4. In addition, several microRNAs, such as miR-12-3p and miR-750-3p, were also modulated in the investigated conditions. Overall, this work reveals a molecular footprint underlying spinosad response in Colorado potato beetles and provides novel leads that could be targeted as part of RNAi-based approaches to control this insect pest.

Susceptibility of Prepupae of the Colorado Potato Beetle (Coleoptera: Chrysomelidae) to Entomopathogenic Nematodes (Rhabditida: Steinernematidae, Heterorhabditidae)

1992 ◽  
Vol 27 (1) ◽  
pp. 37-43 ◽  
Author(s):  
William W. Cantelo ◽  
William R. Nickle
Keyword(s):  
Colorado Potato Beetle ◽  
Leptinotarsa Decemlineata ◽  
Laboratory Tests ◽  
Entomopathogenic Nematodes ◽  
Parasitic Nematodes ◽  
Individual Treatment ◽  
Regression Equations ◽  
Potato Beetle ◽  
Leptinotarsa Decemlineata Say ◽  
The Cost

This research investigated the ability of five species or strains of parasitic nematodes to control the Colorado potato beetle, Leptinotarsa decemlineata (Say), when beetle prepupae were released on potting soil containing the nematodes. The nematodes tested were: Steinernema carpocapsae Weiser (All strain); S. carpocapsae (Mexican strain); S. feltiae (= bibionis) (Filipjev) (strain #27); S. feltiae (strain #980) and Heterorhabditis bacteriophora Poinar. Six dosage levels ranging from 10.3 to 329.2 nematodes/cm2, in addition to the water-only controls, were used in these laboratory tests. Each dosage-strain combination was replicated four times with 20 prepupae exposed to each individual treatment. The five strains demonstrated 100% kill at 164.6 nematodes/cm2. Except for the Mexican strain of S. carpocapsae, every strain produced over 98% mortality at 82.3 nematodes/cm2. Dosage response regression equations were calculated for each strain. Although field applications probably would require higher rates to obtain the same mortality, the use of parasitic nematodes has potential for suppressing Colorado potato beetle populations. The cost or dosage rate of nematodes may have to be reduced before the control costs would be acceptable to a grower.

Growth and development of Colorado potato beetle larvae, Leptinotarsa decemlineata, on potato plants expressing the oryzacystatin II proteinase inhibitor

2015 ◽  
Vol 24 (4) ◽  
pp. 729-740 ◽  
Author(s):  
Aleksandar Cingel ◽  
Jelena Savić ◽  
Branka Vinterhalter ◽  
Dragan Vinterhalter ◽  
Miroslav Kostić ◽  
...  
Keyword(s):  
Colorado Potato Beetle ◽  
Leptinotarsa Decemlineata ◽  
Proteinase Inhibitor ◽  
Growth And Development ◽  
Potato Plants ◽  
Potato Beetle

INTERACTIONS AT THREE TROPHIC LEVELS: EDOVUM PUTTLERI GRISSELL (HYMENOPTERA: EULOPHIDAE), THE COLORADO POTATO BEETLE, AND INSECT-RESISTANT POTATOES

1989 ◽  
Vol 121 (10) ◽  
pp. 841-851 ◽  
Author(s):  
John R. Ruberson ◽  
Maurice J. Tauber ◽  
Catherine A. Tauber ◽  
Ward M. Tingey
Keyword(s):  
Colorado Potato Beetle ◽  
Leptinotarsa Decemlineata ◽  
Life History Traits ◽  
Glandular Trichomes ◽  
Trophic Levels ◽  
The Other ◽  
Edovum Puttleri ◽  
Potato Plants ◽  
Potato Beetle ◽  
Insect Resistant

AbstractResistant potato plants influenced the parasitoid Edovum puttleri Grissell directly, as well as indirectly through eggs of the parasitoid’s host, the Colorado potato beetle, Leptinotarsa decemlineata (Say). In the field, E. puttleri parasitized more egg masses on plants with no glandular trichomes or with glandular trichomes bearing only enclosed droplets of exudate than on plants with two types of glandular trichomes (one with exposed droplets and the other bearing enclosed droplets). Trichomes with exposed droplets entrapped numerous parasitoids. Although rearing L. decemlineata on resistant plants influenced many of the beetle’s life-history traits, it did not affect the suitability of their eggs for development and survival of preimaginal E. puttleri. However, eggs from L. decemlineata that were reared on resistant potato plants reduced the longevity of the parasitoids and also reduced the number of hosts (eggs) killed by parasitoids.

AN ATTACK ON A CICADA BY POLISTES RUBIGINOSUS

1933 ◽  
Vol 65 (6) ◽  
pp. 129-129
Author(s):  
Harold O'Byrne
Keyword(s):  
Natural Enemies ◽  
Colorado Potato Beetle ◽  
Leptinotarsa Decemlineata ◽  
Potato Beetle ◽  
Varied Diet

According to Ashmead (1896) and others, the wasps belonging to the genus Polistes usually feed their young chewed-up fragments of lepidopterous larvae. However, Riley (1873) mentions P. rubiginosus Lept. as one of the natural enemies of the Colorado potato beetle, Leptinotarsa decemlineata Say, whose larvae it carries to its nest. A varied diet is therefore to be expected in these wasps. Nevertheless, I was very much surprised when I came across a rubiginosus engaged in a violent struggle with a large cicada (identified as Tibicen auletes Germ. by Mr. William T. Davis), at Ranken, Missouri, on July 19, 1932.

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