Details
| Original language | English |
|---|---|
| Pages (from-to) | 976-989 |
| Number of pages | 14 |
| Journal | Journal of applied entomology |
| Volume | 147 |
| Issue number | 10 |
| Publication status | Published - 6 Dec 2023 |
Abstract
Understanding the cues used by insects to select their hosts is essential for developing sustainable control strategies, particularly for plant disease vectors. Pear psyllids (Cacopsylla pyri) are vectors of the bacterial disease pear decline caused by ‘Candidatus Phytoplasma pyri’. Yellow sticky traps are typically used to monitor pest insects, but they are non-specific and capture many beneficial insects, too. Against the background of improving visual traps, this research aimed to investigate the colour choice behaviour of C. pyri. Our first approach was to screen insect colour preferences by performing choice assays with different LED colour wavelengths in a small-scale choice arena under controlled conditions. Over six LEDs tested, there was a strong significant preference of C. pyri for green 1 (532 nm) followed by green 2 (549 nm). Yellow (576 nm), orange (593 nm), red 1 (619 nm) and red 2 (633 nm) were less attractive than green. Subsequently, the trapping of pear psyllids was tested in the field using newly developed traps covered with transparent-coloured PVC sheets with a similar wavelength of the preferred LEDs. Red and completely transparent traps have been used as control and combined in randomized blocks in a pear orchard. Field trials revealed that green traps ranging from 525 to 537 nm attracted significantly more pear psyllids than longer wavelength green (543 nm), red and transparent ones. The construction of specific green-coloured sticky traps seems promising for improving psyllid trapping, especially during an early infestation at low population densities. Thus, these visual traps should be considered in future and integrated into psyllid monitoring as part of integrated pest management.
Keywords
- IPM, colour sticky traps, colour vision, monitoring, pear decline, psyllids
ASJC Scopus subject areas
- Agricultural and Biological Sciences(all)
- Insect Science
- Agricultural and Biological Sciences(all)
- Agronomy and Crop Science
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In: Journal of applied entomology, Vol. 147, No. 10, 06.12.2023, p. 976-989.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Preference of pear psyllid (Cacopsylla pyri) for specific colour inspires new application in plant protection
AU - Czarnobai De Jorge, Bruna
AU - Meyhöfer, Rainer
AU - Jürgens, Andreas
AU - Gross, Jürgen
N1 - Funding Information: The authors are grateful to: The CNPq/DAAD grant which supported BCDJ's PhD Research Scholarship; Natalie Giesen, Thimo Braun, Sabine Wetzel (all JKI ‐Dossenheim, Germany) and Timo Michel (LUH) for their excellent technical assistance; Dr. Cornelia Dippel from Insect Services GmbH, Berlin, for providing the traps without charge. Open Access funding enabled and organized by Projekt DEAL.
PY - 2023/12/6
Y1 - 2023/12/6
N2 - Understanding the cues used by insects to select their hosts is essential for developing sustainable control strategies, particularly for plant disease vectors. Pear psyllids (Cacopsylla pyri) are vectors of the bacterial disease pear decline caused by ‘Candidatus Phytoplasma pyri’. Yellow sticky traps are typically used to monitor pest insects, but they are non-specific and capture many beneficial insects, too. Against the background of improving visual traps, this research aimed to investigate the colour choice behaviour of C. pyri. Our first approach was to screen insect colour preferences by performing choice assays with different LED colour wavelengths in a small-scale choice arena under controlled conditions. Over six LEDs tested, there was a strong significant preference of C. pyri for green 1 (532 nm) followed by green 2 (549 nm). Yellow (576 nm), orange (593 nm), red 1 (619 nm) and red 2 (633 nm) were less attractive than green. Subsequently, the trapping of pear psyllids was tested in the field using newly developed traps covered with transparent-coloured PVC sheets with a similar wavelength of the preferred LEDs. Red and completely transparent traps have been used as control and combined in randomized blocks in a pear orchard. Field trials revealed that green traps ranging from 525 to 537 nm attracted significantly more pear psyllids than longer wavelength green (543 nm), red and transparent ones. The construction of specific green-coloured sticky traps seems promising for improving psyllid trapping, especially during an early infestation at low population densities. Thus, these visual traps should be considered in future and integrated into psyllid monitoring as part of integrated pest management.
AB - Understanding the cues used by insects to select their hosts is essential for developing sustainable control strategies, particularly for plant disease vectors. Pear psyllids (Cacopsylla pyri) are vectors of the bacterial disease pear decline caused by ‘Candidatus Phytoplasma pyri’. Yellow sticky traps are typically used to monitor pest insects, but they are non-specific and capture many beneficial insects, too. Against the background of improving visual traps, this research aimed to investigate the colour choice behaviour of C. pyri. Our first approach was to screen insect colour preferences by performing choice assays with different LED colour wavelengths in a small-scale choice arena under controlled conditions. Over six LEDs tested, there was a strong significant preference of C. pyri for green 1 (532 nm) followed by green 2 (549 nm). Yellow (576 nm), orange (593 nm), red 1 (619 nm) and red 2 (633 nm) were less attractive than green. Subsequently, the trapping of pear psyllids was tested in the field using newly developed traps covered with transparent-coloured PVC sheets with a similar wavelength of the preferred LEDs. Red and completely transparent traps have been used as control and combined in randomized blocks in a pear orchard. Field trials revealed that green traps ranging from 525 to 537 nm attracted significantly more pear psyllids than longer wavelength green (543 nm), red and transparent ones. The construction of specific green-coloured sticky traps seems promising for improving psyllid trapping, especially during an early infestation at low population densities. Thus, these visual traps should be considered in future and integrated into psyllid monitoring as part of integrated pest management.
KW - IPM
KW - colour sticky traps
KW - colour vision
KW - monitoring
KW - pear decline
KW - psyllids
UR - http://www.scopus.com/inward/record.url?scp=85173852401&partnerID=8YFLogxK
U2 - 10.1111/jen.13194
DO - 10.1111/jen.13194
M3 - Article
VL - 147
SP - 976
EP - 989
JO - Journal of applied entomology
JF - Journal of applied entomology
SN - 0044-2240
IS - 10
ER -