Native Japanese Polygonaceae Species as Potential Native Insectary Plants in Conserving Indigenous Natural Enemies

Area of Science:

• Agricultural Science
• Ecology
• Entomology

Background:

• Conservation biological control (CBC) often relies on non-native plants, posing ecological risks.
• Native plants offer a sustainable alternative for enhancing natural pest enemies.

Purpose of the Study:

• Identify native plant species as alternatives to non-native insectary plants.
• Evaluate the potential of native Polygonaceae plants for promoting indigenous natural enemies (INEs).
• Assess the impact of Polygonaceae plants on pest suppression in vegetable crops.

Main Methods:

• Bio-prospecting of native plant species in organic field habitats.
• Open field experiments to assess the role of Polygonaceae plants in promoting INEs.
• Molecular analysis to track the migration of INEs between plants.

Main Results:

• Polygonaceae plants were identified as promising native insectary plants.
• Significantly higher densities of INEs (green lacewing, Orius spp.) were observed on eggplants with Polygonaceae plants.
• Reduced pest densities (thrips, whiteflies) were recorded on eggplants with Polygonaceae plants.

Conclusions:

• Polygonaceae plants effectively conserve and promote indigenous natural enemies.
• Native insectary plants, like Polygonaceae, contribute to sustainable pest management.
• This study supports the use of native plants in conservation biological control.