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Student 10-Minute Paper

Plant-Insect Ecosystems

Student Competition

Student

Grad Competition P-IE: Chemical Ecology 1

Identification of herbivore induced plant volatiles produced by strawberry plants in response to chilli thrips, Scirtothrips dorsalis Hood (Thysanoptera: Thripidae) damage

Monday, November 6, 2023
8:48 AM – 9:00 AM ET
Location: Gaylord National Resort & Convention Center, Maryland D
In-Person Student Competition
Herbivore induced plant volatiles (HIPVs) have been utilized for the management of many insect pests, but this avenue is not well explored for Chilli thrips, Scirtothrips dorsalis Hood (Thysanoptera: Thripidae) management in strawberries. Moreover, under current practices, thrips pests are controlled primarily with insecticides. Hence, there is a specific need to investigate alternative, more sustainable thrips management strategies. Therefore, the objectives of this study were, 1) identification of HIPVs in response to S. dorsalis infestation. The volatiles from plants of each cultivar (Radiance and Sensation®) were collected from plants being treated in the following ways- 1) clean plants, 2) plants infested with S. dorsalis only, 3) plants with mechanical injury. The volatiles were collected from the head space of the plants using push and pull system and identified through GC-MS. The results showed plants with S. dorsalis produced significantly higher number of green leaf volatiles (GLV) and terpenoids as compared to other treatments. Sensation® plants infested with S. dorsalis produced more GLV volatiles whereas Brilliance had a higher number of defensive volatiles such as sesquiterpenoids. The results of this study will enable the identification of potential plant volatiles that can be used as attractant or repellent against S. dorsalis and will help in developing integrated pest management strategy for S. dorsalis in Florida strawberry.