The emergence of resistance among pests to conventional
pesticides underscores the necessity for substantial efforts in
identifying alternatives for managing cotton pests. So the
research aimed to use the photosensitizing compounds Rose
Bengal, Rhodamine B, and Methylene Blue for sustainable
and eco-friendly managing of cotton pests, mainly, the sec-
ond instar larvae of Earias insulana. Results indicated a high
efficacy of Rose Bengal when scored 1.24x10−5M and
1.26x10−4M LC50 and LC90, respectively followed by other
compounds. Rose Bengal, Rhodamine B and Methylene Blue
scored 2h highest LT50 at concentrations 3x10−5M. While LT50
values were 0.30, 0.55 and 1:45h at 1x10−4M. Rose Bengal
was high effective against E. insulana larvae compared to
Methylene Blue and Rhodamine B. Moreover, the findings
revealed a discernible negative correlation between the con-
centrations applied and the necessary median lethal time for
all tested compounds indicating their efficacy against E. insu-
lana larvae |
