The efficacy of TEPKI® in comparison some insecticides against the western flower thrips on greenhouse strawberry.
2013
Golmohammadi, Gholam Reza | Ghazavi, Mehran | Farazmand, Hossaien
The Western flower thrips, Frankliniella occidentalis (Thys.: Thripidae), is a key pest of greenhouse products, especially strawberry. Considering the high potential of this pest for developing resistance to insecticides, it is necessary to study the efficacy and mode of action of different insecticides against this pest. This research was conducted in a completely randomized design with 7 treatments and 4 replications in the greenhouses of Tehran (Varamin) and Alborz provinces. Treatments were dichlorvos at 1 ml/l, flonicamid (Tepeki® 50% WG) at 0.2 g/li, t, flonicamid (Tepeki® 50% WG) at 0.25 g/lit, flonicamid (Tepeki® 50% WG) at 0.3 g/lit, dichlorvus (EC 50)Neemarin® (EC 1500) at 2.5 cc/lit, Pyrethrum® (EC 5) at 4 cc/lit, and control (water spraying). The sampling was done one day before spraying and also on the 3rd, 7th and 17th day after treatment. Analysis of variance of data, followed by Duncan test, was done in SAS. In Tehran, 3 days after treatment, the mean efficacy percentage of Tepeki® at 3 g/lit, dichlorvus, Tepeki® at 0.25 g/lit, Tepeki® at 0.2 g/lit, , Neemarin® and Pyrethrum® were 82.35, 87.03, 69.35, 68.53, 56.95 and 55.94, respectively. On the 7th day after treatment, the highest and lowest mean efficacies were observed in Tepeki at 0.3 g/lit and , Neemarin® in which the mean efficacy percentage were 85.75 and 66.37, respectively. In Karaj, 3 days after treatment, the mean efficacy percentage of Tepeki® at 3 g/lit, Tepeki® at 0.25 g/lit, Tepeki® at 0.2 gc/lit, dichlorvos, , Neemarin® and Pyrethrum® were 80.46, 70.46, 75.38, 82.41, 61.39 and 47.42, respectively. In general, Tepeki had an acceptable control level in the greenhouse against F. occidentalis. Key words: efficacy, insecticides, flonicamid, thrips
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