Details
| Original language | English |
|---|---|
| Pages (from-to) | 275-289 |
| Number of pages | 15 |
| Journal | Entomologia Experimentalis et Applicata |
| Volume | 169 |
| Issue number | 3 |
| Early online date | 27 Jan 2021 |
| Publication status | Published - 15 Feb 2021 |
Abstract
Western flower thrips, Frankliniella occidentalis (Pergande) (Thysanoptera: Thripidae), is an economically important pest insect in vegetable and ornamental cultivation worldwide. Little is known about host plant resistance in the vegetative and generative phases of chrysanthemum [Chrysanthemum × morifolium (Ramat.) Hemsl. (Asteraceae)] and the role of resistance factors such as flavonols, flower color, and flower shape. We screened a broad range of chrysanthemum cultivars across two seasons to quantify resistance against Western flower thrips. Resistance was based on silver damage on the leaves, and relative flavonol content was measured using a Dualex Scientific 4 hand-held sensor. There was significant variation in silver damage between cultivars, indicating different levels of resistance. There was no correlation between the relative flavonol content in middle leaves and plant silver damage. A clearer resistance level discrimination by flavonols in resistant and susceptible cultivars would be possible in the future by comparing multiple leaf positions during the ontogenetic phases of plant development. Moreover, the influence of flower color and shape on resistance to thrips was investigated by counting the adult thrips and larvae on flowers. The results showed significant differences in flower color preference by adults, but not by larvae. Flower shape influenced thrips larvae and females, but not males. The importance of the results for resistance determination is discussed.
Keywords
- Asteraceae, chrysanthemum resistance, Dualex Scientific 4 sensor, flower color, flower shape, Frankliniella occidentalis, relative flavonol contents, resistance screening, silver damage, Thripidae, Thysanoptera, Western flower thrips
ASJC Scopus subject areas
- Agricultural and Biological Sciences(all)
- Ecology, Evolution, Behavior and Systematics
- Agricultural and Biological Sciences(all)
- Insect Science
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In: Entomologia Experimentalis et Applicata, Vol. 169, No. 3, 15.02.2021, p. 275-289.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - The role of plant physiology and cultivar of chrysanthemum in the resistance against Western flower thrips
AU - Rogge, Sina Alexandra
AU - Meyhöfer, Rainer
N1 - Funding Information: We thank Christina Paul, Marina Amelin, and Patricia L. Steinhoff for their help in the greenhouse and laboratory, and Dr. Christine Dieckhoff for the scientific discussion. Chrysanthemum plants were kindly provided by Deliflor Chrysanthemums (The Netherlands) and Brandkamp Company (Germany). The project was supported by funds of the Federal Ministry of Food and Agriculture (BMEL) based on a decision of the Parliament of the Federal Republic of Germany via the Federal Office for Agriculture and Food (BLE) under the innovation support program (ptble).
PY - 2021/2/15
Y1 - 2021/2/15
N2 - Western flower thrips, Frankliniella occidentalis (Pergande) (Thysanoptera: Thripidae), is an economically important pest insect in vegetable and ornamental cultivation worldwide. Little is known about host plant resistance in the vegetative and generative phases of chrysanthemum [Chrysanthemum × morifolium (Ramat.) Hemsl. (Asteraceae)] and the role of resistance factors such as flavonols, flower color, and flower shape. We screened a broad range of chrysanthemum cultivars across two seasons to quantify resistance against Western flower thrips. Resistance was based on silver damage on the leaves, and relative flavonol content was measured using a Dualex Scientific 4 hand-held sensor. There was significant variation in silver damage between cultivars, indicating different levels of resistance. There was no correlation between the relative flavonol content in middle leaves and plant silver damage. A clearer resistance level discrimination by flavonols in resistant and susceptible cultivars would be possible in the future by comparing multiple leaf positions during the ontogenetic phases of plant development. Moreover, the influence of flower color and shape on resistance to thrips was investigated by counting the adult thrips and larvae on flowers. The results showed significant differences in flower color preference by adults, but not by larvae. Flower shape influenced thrips larvae and females, but not males. The importance of the results for resistance determination is discussed.
AB - Western flower thrips, Frankliniella occidentalis (Pergande) (Thysanoptera: Thripidae), is an economically important pest insect in vegetable and ornamental cultivation worldwide. Little is known about host plant resistance in the vegetative and generative phases of chrysanthemum [Chrysanthemum × morifolium (Ramat.) Hemsl. (Asteraceae)] and the role of resistance factors such as flavonols, flower color, and flower shape. We screened a broad range of chrysanthemum cultivars across two seasons to quantify resistance against Western flower thrips. Resistance was based on silver damage on the leaves, and relative flavonol content was measured using a Dualex Scientific 4 hand-held sensor. There was significant variation in silver damage between cultivars, indicating different levels of resistance. There was no correlation between the relative flavonol content in middle leaves and plant silver damage. A clearer resistance level discrimination by flavonols in resistant and susceptible cultivars would be possible in the future by comparing multiple leaf positions during the ontogenetic phases of plant development. Moreover, the influence of flower color and shape on resistance to thrips was investigated by counting the adult thrips and larvae on flowers. The results showed significant differences in flower color preference by adults, but not by larvae. Flower shape influenced thrips larvae and females, but not males. The importance of the results for resistance determination is discussed.
KW - Asteraceae
KW - chrysanthemum resistance
KW - Dualex Scientific 4 sensor
KW - flower color
KW - flower shape
KW - Frankliniella occidentalis
KW - relative flavonol contents
KW - resistance screening
KW - silver damage
KW - Thripidae
KW - Thysanoptera
KW - Western flower thrips
UR - http://www.scopus.com/inward/record.url?scp=85099819135&partnerID=8YFLogxK
U2 - 10.1111/eea.13018
DO - 10.1111/eea.13018
M3 - Article
AN - SCOPUS:85099819135
VL - 169
SP - 275
EP - 289
JO - Entomologia Experimentalis et Applicata
JF - Entomologia Experimentalis et Applicata
SN - 0013-8703
IS - 3
ER -