Farmanullah, Hayat Badshah, and Rakhmin Gul

pp. 17 - 23

Abstract

Studies on the efficacy of different insecticides against citrus psylla, Diaphorina citri (Hemiptera:
Psyllidae) were carried out at Agricultural Research Institute, Tarnab, Peshawar, Pakistan. Six insecticides
viz. Actara 25 WG, (thiamethoxam) Cascade 10 DC (Flufenoxuron), Match 050 EC (lufenuron), Thiodan 35
EC (endosulfan), Karate 2.5 EC (α-cyhalothrin), and Supracide 40 EC (methidathion), were tested for their
effectiveness against D. citri. After first spray overall mean population of D. citri was 3.63, 4.75, 5.59, 6.66,
7.47, 8.11 per six inches tender shoot on Actara 25 WG, Cascade 10 DC, Match 050 EC, Thiodan 35 EC,
Karate 2.5 EC and Supracide 40 EC treated plants respectively, while on control plants the population was
12.39. Similarly, after the second spray of each of the same insecticides the population of D. citri was 2.65,
4.23, 5.61, 6.41, 7.35 and 8.73 respectively. Where in controls there were 15.18 psyllids. Percent decrease
of D. citri population in comparison to control after the first spray was highest in Actara 25 WG (72.20)
followed by Cascade 10 DC (62.91), Match 050 EC (54.07), Thiodan 35 EC (47.61), Karate 2.5 EC (38.94)
and Supracide 40 EC (35.74). After the second spray percent decrease over control recorded was highest in
Actara 25 WG (83.54), followed by Cascade 10 DC (71.08), Match 050 EC (63.94), Thiodan 35 EC (60.79),
Karate 2.5 EC (52.52) and Supracide 40 EC (45.62).