2A6WK6GB

2299

6 janvier 2021 16:24

6 janvier 2021 16:24

The egg parasitoid Trissolcus japonicus is the main candidate for classical biocontrol of the invasive agricultural pest Halyomorpha halys. The efficacy of classical biocontrol depends on the parasitoid’s survival and conservation in the agroecosystem. Most parasitoid species rely on floral nectar as a food source, thus identifying nectar sources for T. japonicus is critical. We evaluated the impact of eight flowering plant species on T. japonicus survival in the lab by exposing unfed wasps to flowers inside vials. We also measured the wasps’ nutrient levels to confirm feeding and energy storage using anthrone and vanillin assays adapted for T. japonicus. Buckwheat, cilantro, and dill provided the best nectar sources for T. japonicus by improving median survival by 15, 3.5, and 17.5 days compared to water. These three nectar sources increased wasps’ sugar levels, and cilantro and dill also increased glycogen levels. Sweet alyssum, marigold, crimson clover, yellow mustard, and phacelia did not improve wasp survival or nutrient reserves. Further research is needed to determine if these flowers maintain their benefits in the field and whether they will increase the parasitism rate of H. halys.

None

• AB - Utile à l'AB
• FREDO lutte
• GEO Etats-Unis

• biocontrol
• biological control
• brown marmorated stink bug
• conservation
• flowers
• longevity
• nectar subsidy
• samurai wasp
• survival

Insects

11

413

2020/7

24 juillet 2020

10.3390/insects11070413 Le DOI est une URL unique de référencement d'une publication. Il est donc plus fiable et permanent qu'une URL classique