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Post introductory risk assessment studies on Zygogramma bicolorata (Coleoptera: Chrysomelidae), a classical biological control agent of Parthenium hysterophorus (Asteraceae) in India

2008; Taylor & Francis; Volume: 18; Issue: 10 Linguagem: Inglês

10.1080/09583150802488808

1360-0478

P. N. Ganga Visalakshy, K. P. Jayanth, Sanjay Kumar Ghosh, MG Chaudhary,

Essential Oils and Antimicrobial Activity

Abstract Zygogramma bicolorata Pallister (Coleoptera: Chrysomelidae), a biological control agent of Parthenium hysterophorus L. (Asteraceae), was feeding on leaves of Helianthus annuus in India, raising concerns of its host range. Based on the age grading technique, it was shown that the majority of Z. bicolorata on sunflower plants at any time were reproductively immature. This establishes that Z. bicolorata does not pose any risk to sunflower in India.