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Q&A ViewAttendees 4

Plant-Insect Ecosystems

10-Minute Paper

P-IE: IPM - General

Behavioural choices of Lygus lineolaris in semi-field strawberry arenas with integrated pest management strategies

Tuesday, November 2, 2021
4:18 PM - 4:30 PM MT
Location: Colorado Convention Center, Meeting Room 301-303
In-Person

    Presenting Author(s)

  • MS

    Mireia Solà Cassi

    Postdoc
    Université du Québec
    Montréal, Canada

    • Co-Author(s)

  • FD

    François Dumont

    Centre de recherche agroalimentaire de Mirabel (CRAM)
    Mirabel, Québec, Canada

  • ÃL

    Éric Lucas

    Professor
    Université du Québec
    Montréal, Québec, Canada

  • Caroline Provost

    Director, Researcher
    Centre de recherche agroalimentaire de Mirabel (CRAM)
    Mirabel, Québec, Canada

Lygus lineolaris (Palisot de Beauvois) (Hemiptera: Miridae) (TPB), threatens more than 130 economically essential crops. The need for efficient strategies to control this significant pest is urgent.

The objective was to characterize the preferred TPB host for feeding and oviposition under different strategies. Then, semi-field experiments were conducted with arenas simulating a strawberry field with predators, Nabis americoferus (Carayon) (Hemiptera: Nabidae) (P), and trap crops (buckwheat and canola) (TC). In each arena, 30 adult TPB were allowed to choose between 3 plants and 4 plant structures under the following treatments: i) 3 strawberry plants (Stw), ii) 3 Stw and 3 P, iii) 1 Stw and 2 TC, iv) 1 Stw, 2 TC and 3 P. The insect’s position was observed 4 times a day for 72h. Ten days later, adults were removed, plant structures cut and the number of L1 assessed.

Results showed that TPB distributes the exploitation of resources across the different hosts. A high percentage of TPB was found outside plants, especially when only strawberries were present. TC, especially canola, were the preferred host for both species while the least preferred feeding host remained the strawberry. The preferred plant structure for oviposition was the stem. TPB preferred to feed on flowers while Nabis was often found on the stem or the obverse leaf. Overall, results suggest that 1) the use of TC may reduce the pressure on strawberries and 2) Nabis presence may induce changes in TPB behaviour, shifting its feeding and oviposition preferences to less preferred hosts.