Overcoming the challenge of invasive Parthenium hysterophorus management through integration of Aspergillus allahabadii (Eurotiales: Aspergillaceae) and Zygogramma bicolorata (Coleoptera: Chrysomelidae) as biocontrol agents

Abstract

Parthenium hysterophorus is an invasive weed posing significant environmental challenges. This study explores the synergistic effects of the fungal strain Aspergillus allahabadii (P-Ph-13) and its interaction with the beetle Zygogramma bicolorata in controlling the weed. The combined action of A. allahabadii (P-Ph-13) and Z. bicolorata significantly suppressed the weed's germination and growth. Interaction with Z. bicolorata further boosted its effectiveness, decreasing seedling vigor by 78 % and increasing mortality by up to 42 % compared to the control group. Additionally, the interactive treatment severely disrupted the weed's physiological processes, causing extensive damage and ultimately leading to seedling death. These findings indicate that the synergistic effect of A. allahabadii and Z. bicolorata presents a promising strategy for managing Parthenium.

Keywords

• Parthenium hysterophorus
• Aspergillus allahabadii
• Zygogramma bicolorata
• Biological control
• Synergistic effect