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The control of Epicometis hirta Poda in apple orchards with azadirachtin

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2019
Authors
Vuković, Slavica
Lazić, Sanja
Gvozdenac, Sonja
Šunjka, Dragana B.
Article (Published version)
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Abstract
Epicometis hirta damages flowers and flower buds of stone fruits. The chemical control of this pest is not recommended because it is usually applied in the flowering period, when bees and other pollinators are present and can cause uncontrolled mortality for such important species. This experiment aimed to assess the efficacy of the biological (azadirachtin) and chemical (tau-fluvalinate) insecticides on E. hirta in apples. Before the application, the active ingredients’ content was determined and their physical and chemical properties were tested in accordance with the recommendations of FAO and WHO. The experiments were carried out during 2015 in Vojvodina province, Serbia (localities Čelarevo and Kovilj) in apple orchards, using standard OEPP methods and a modified method in accordance with the pest biology and apple phenofaze. Insecticides’ amounts were calculated for the amount of active ingredient L-1, then applied as follows, azadirachtin (10 g a.i. L-1) was applied at 0.3% conc...entration and tau-fluvalinate (240 g a.i. L-1) in an amount of 0.3 L ha-1. Three assessments were made, after one, three and seven days of the treatment, by counting the number of the dead + paralyzed beetles and determining the damage on apple flowers. The results were presented as an efficacy percentage (%). Also a laboratory test was carried out. In Čelarevo the efficacy of azadirachtin was very low (9.5 to 12.5%) while tau-fluvalinate ranged from 5.0 to 100%. In Kovilj the efficacy of azadirachtin, depended on the time of evaluation, and ranged from 37.5 to 68.6%, and tau-fluvalinate ranged from 73.3 to 100%. At both localities, flowers were completely damaged in the control, while the damage was less in treatments with insecticides. In laboratory conditions low mortality was registered after 24 and 48 h of exposure and only after 72 h the mortality ranged from 42.5 to 51.0%, depending on the insecticide. The flower damage was not as severe when compared to the control where the entire flowers were eaten. We can conclude that the biological insecticide azadirachtin exhibited mainly repellent and partially insecticidal effects on E. hirta in apple orchards.

Keywords:
Apple orchards / Azadirachtin / Epicometis hirta / Tau-fluvalinate
Source:
Acta Horticulturae, 2019, 1242, 775-778
Publisher:
  • International Society for Horticultural Science
Funding / projects:
  • Development of integrated management of harmful organisms in plant production in order to overcome resistance and to improve food quality and safety (RS-46008)

DOI: 10.17660/ActaHortic.2019.1242.115

ISSN: 0567-7572

Scopus: 2-s2.0-85070853042
[ Google Scholar ]
URI
http://fiver.ifvcns.rs/handle/123456789/1941
Collections
  • Radovi istraživača / Researchers' papers
Institution/Community
FiVeR
TY  - JOUR
AU  - Vuković, Slavica
AU  - Lazić, Sanja
AU  - Gvozdenac, Sonja
AU  - Šunjka, Dragana B.
PY  - 2019
UR  - http://fiver.ifvcns.rs/handle/123456789/1941
AB  - Epicometis hirta damages flowers and flower buds of stone fruits. The chemical control of this pest is not recommended because it is usually applied in the flowering period, when bees and other pollinators are present and can cause uncontrolled mortality for such important species. This experiment aimed to assess the efficacy of the biological (azadirachtin) and chemical (tau-fluvalinate) insecticides on E. hirta in apples. Before the application, the active ingredients’ content was determined and their physical and chemical properties were tested in accordance with the recommendations of FAO and WHO. The experiments were carried out during 2015 in Vojvodina province, Serbia (localities Čelarevo and Kovilj) in apple orchards, using standard OEPP methods and a modified method in accordance with the pest biology and apple phenofaze. Insecticides’ amounts were calculated for the amount of active ingredient L-1, then applied as follows, azadirachtin (10 g a.i. L-1) was applied at 0.3% concentration and tau-fluvalinate (240 g a.i. L-1) in an amount of 0.3 L ha-1. Three assessments were made, after one, three and seven days of the treatment, by counting the number of the dead + paralyzed beetles and determining the damage on apple flowers. The results were presented as an efficacy percentage (%). Also a laboratory test was carried out. In Čelarevo the efficacy of azadirachtin was very low (9.5 to 12.5%) while tau-fluvalinate ranged from 5.0 to 100%. In Kovilj the efficacy of azadirachtin, depended on the time of evaluation, and ranged from 37.5 to 68.6%, and tau-fluvalinate ranged from 73.3 to 100%. At both localities, flowers were completely damaged in the control, while the damage was less in treatments with insecticides. In laboratory conditions low mortality was registered after 24 and 48 h of exposure and only after 72 h the mortality ranged from 42.5 to 51.0%, depending on the insecticide. The flower damage was not as severe when compared to the control where the entire flowers were eaten. We can conclude that the biological insecticide azadirachtin exhibited mainly repellent and partially insecticidal effects on E. hirta in apple orchards.
PB  - International Society for Horticultural Science
T2  - Acta Horticulturae
T1  - The control of Epicometis hirta Poda in apple orchards with azadirachtin
EP  - 778
SP  - 775
VL  - 1242
DO  - 10.17660/ActaHortic.2019.1242.115
UR  - conv_2902
ER  - 
@article{
author = "Vuković, Slavica and Lazić, Sanja and Gvozdenac, Sonja and Šunjka, Dragana B.",
year = "2019",
abstract = "Epicometis hirta damages flowers and flower buds of stone fruits. The chemical control of this pest is not recommended because it is usually applied in the flowering period, when bees and other pollinators are present and can cause uncontrolled mortality for such important species. This experiment aimed to assess the efficacy of the biological (azadirachtin) and chemical (tau-fluvalinate) insecticides on E. hirta in apples. Before the application, the active ingredients’ content was determined and their physical and chemical properties were tested in accordance with the recommendations of FAO and WHO. The experiments were carried out during 2015 in Vojvodina province, Serbia (localities Čelarevo and Kovilj) in apple orchards, using standard OEPP methods and a modified method in accordance with the pest biology and apple phenofaze. Insecticides’ amounts were calculated for the amount of active ingredient L-1, then applied as follows, azadirachtin (10 g a.i. L-1) was applied at 0.3% concentration and tau-fluvalinate (240 g a.i. L-1) in an amount of 0.3 L ha-1. Three assessments were made, after one, three and seven days of the treatment, by counting the number of the dead + paralyzed beetles and determining the damage on apple flowers. The results were presented as an efficacy percentage (%). Also a laboratory test was carried out. In Čelarevo the efficacy of azadirachtin was very low (9.5 to 12.5%) while tau-fluvalinate ranged from 5.0 to 100%. In Kovilj the efficacy of azadirachtin, depended on the time of evaluation, and ranged from 37.5 to 68.6%, and tau-fluvalinate ranged from 73.3 to 100%. At both localities, flowers were completely damaged in the control, while the damage was less in treatments with insecticides. In laboratory conditions low mortality was registered after 24 and 48 h of exposure and only after 72 h the mortality ranged from 42.5 to 51.0%, depending on the insecticide. The flower damage was not as severe when compared to the control where the entire flowers were eaten. We can conclude that the biological insecticide azadirachtin exhibited mainly repellent and partially insecticidal effects on E. hirta in apple orchards.",
publisher = "International Society for Horticultural Science",
journal = "Acta Horticulturae",
title = "The control of Epicometis hirta Poda in apple orchards with azadirachtin",
pages = "778-775",
volume = "1242",
doi = "10.17660/ActaHortic.2019.1242.115",
url = "conv_2902"
}
Vuković, S., Lazić, S., Gvozdenac, S.,& Šunjka, D. B.. (2019). The control of Epicometis hirta Poda in apple orchards with azadirachtin. in Acta Horticulturae
International Society for Horticultural Science., 1242, 775-778.
https://doi.org/10.17660/ActaHortic.2019.1242.115
conv_2902
Vuković S, Lazić S, Gvozdenac S, Šunjka DB. The control of Epicometis hirta Poda in apple orchards with azadirachtin. in Acta Horticulturae. 2019;1242:775-778.
doi:10.17660/ActaHortic.2019.1242.115
conv_2902 .
Vuković, Slavica, Lazić, Sanja, Gvozdenac, Sonja, Šunjka, Dragana B., "The control of Epicometis hirta Poda in apple orchards with azadirachtin" in Acta Horticulturae, 1242 (2019):775-778,
https://doi.org/10.17660/ActaHortic.2019.1242.115 .,
conv_2902 .

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