Host selection by thrips is affected by the floral volatile profile of sunflower

Author:

Qu Hui1,Chuai Ze‐Run1,Zhang Wen‐Bing1,Zhang Jian1,Yun Xiao‐Peng2,Liu Jun3,Zhao Jun1,Li Hai‐Ping1ORCID

Affiliation:

1. College of Horticulture and Plant Protection Inner Mongolia Agricultural University Hohhot China

2. Plant Protection Department Inner Mongolia Academy of Agriculture and Animal Husbandry Hohhot China

3. Urad Front Banner Agriculture and Technology Promotion Center Bayannur China

Abstract

AbstractThrips, Frankliniella intonsa, is a highly polyphagous pest with a worldwide distribution. F. intonsa‐infested sunflower seeds show marked visual damage. The study findings revealed that significantly more F. intonsa infested confection sunflower compared to oilseed sunflower, via olfactometer bioassay studies, we found that compared with the flower and pollen of oilseed sunflowers, those of confection sunflowers attract F. intonsa. Considering this discrepancy in the preference of F. intonsa on oilseed and confection sunflowers, the volatiles of the flower and pollens of two sunflowers were analysed by gas chromatography‐mass spectroscopy. The behavioural responses of F. intonsa were assessed for these compounds using Y‐tube bioassays. Geranyl bromide, a unique volatile component of oilseed sunflowers, induced an assertive approach‐avoidance behaviour in F. intonsa, whereas the unique component ethyl isovalerate in confection sunflowers attracted F. intonsa. F. intonsa adults demonstrated significant attraction to the blends of confection sunflowers. Furthermore, field verification revealed that intercropping confection and oilseed sunflowers could effectively control F. intonsa. The study provided insights into the chemical cues used by F. intonsa in locating hosts. Therefore, oilseed sunflowers can be used as repellent plants to prevent F. intonsa invasion.

Publisher

Wiley

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