JOURNAL OF LIAONING TECHNICAL UNIVERSITY

TOXICITY EFFECT OF DIFFERENT CONCENTRATIONS OF LAMBDA CYHALOTHRIN AGAINST PINK HIBISCUS MEALY BUGS (Maconellicoccushirsutus) UNDER LABORATORY CONDITIONS

Rahim Shah, Waseem Hayat, Abdur Rahman, Niamat Gul, Asad Ur Rehman, Mohammad Zubair, Ayesha Israr, Uzair Ahmad, Muhammad Afzal Ghani Sulehria, Yasir Ali *, Qaisar Hamad

Abstract

The current study was conducted to find out the effect of different doses of lambda cyhalothrin against pink hibiscus mealybugs, (Maconellicoccushirsutus) under laboratory conditions. This research work was conducted at the Department of Plant Protection, The University of Agriculture Peshawar during the year 2020. Four different concentrations 0.5%, 0.7%, 0.9% and 1.25% of lambda cyhalothrin were used against using dip and spray method. There were 5 treatments, and each treatment was replicated three times. The experiment was conducted in Complete Randomized Design. In leaf dip method experiment, the results showed that maximum mortality (93.33 %) was recorded at 1.25%, this was followed by 0.9 % with where 70% mortality was recorded after 72 hours. While minimum mortality (23.33%) at 0.5 %, followed by 0.7 % with (56.67%) was recorded. Similarly spray method, maximum mortality of pink hibiscus mealy bugs was recorded (43.33%) at dose rate of 1.25% of lambda cyhalothrin followed by dose rate of 0.9% with (40 %) mortality while minimum mortality (23.33%) was observed at dose rate of 0.5% followed by 0.7 % with (33.33 %) mortality recorded after 72 hours. The study revealed that 1.25 % concentration of lambda cyhalothrin was found effective against adult pink hisbiscus mealybugs in both the dip and spray methods and can be used against in M. hirsutus IPM program.

Keywords: Lambda Cyhalothrin, M. hirsutus, pink hisbiscus,