| Re-evaluation of registered acaricides on two-spotted spider mite on greenhouse cucumber |
| Paper ID : 1247-3IICE (R1) |
| Authors: |
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Mostafa Mirzaei * Agricultural Zoology Research Department, Iranian Research Institute of Plant Protection, Agricultural Research, Education and Extension Organization (AREEO), Tehran, Iran |
| Abstract: |
| Tetranychus urticae Koch, is one of the major pests in greenhouse crops. This cosmopolitan and polyphagous species can cause qualitative and quantitative damage by suck the sap and spin webbing. A recent survey proved that the effectiveness of registered acaricides on this pest has decreased. Therefore, in order to re-evaluate the efficacy of registered acaricides, an experiment was designed to apply Pestout® 1, 3, 5 and 7.5 ml/l, Danisaraba® 1 ml/l, Dayabon® 8 ml/l, Kanemite® 1 and 1.25 ml/l, Abamectin® 0.6 ml/l, Tondexir® 3 ml/l, Oberon® 3 ml/l and control (water) on motile form of two-spotted spider mite (TSSM) on cucumber cv. Alfred in Pakdasht county. Randomized complete block design was used with three replications and the abovementioned 12 treatments in Aug-Nov 2018. Sampling of 20 leaves was used to assess the mortality rate of TSSM in each unit 1 day before and 1, 3, 7 and 14 days after treatment. Data was corrected by Henderson-Tilton formula. Mean comparison was performed by Duncan’s multiple range test in SAS software (P<5%). The results revealed that the highest efficiency was related to the Pestout 7.5 with 98.55% mortality 1 day after treatment. However, in the same day of assessment Pestout (3, 5 and 7.5 ml/l), Danisaraba, both rates of Kanemite and Oberon treatments showed more than 87% mortality without any significant differences. On the third day after treatment Kanemite (1.25 ml/l) with 100% mortality was the most efficient acaricide, although, without any significant differences with Pestout (3, 5 and 7.5 ml/l), Danisaraba, Kanemite (1 ml/l), Dayabon, Abamectin and Oberon. In contrast, the lowest efficiency was related to Tondexir with 64% mortality. On the seventh day after treatment, Pestout (7.5 ml/l) had the highest mortality rates (98.31%) and after that Kanemite (1.25 ml/l) (96.26%), Pestout (5 ml/l) (96.17%), Danisaraba (94.30%), Oberon (93.96%), Abamectin (92.21%), Kanemite (1 ml/l) (91.17%) and finally Pestout (3 ml/l) (89.76%) were located without any significant differences. Whereas, the lowest efficiency with 46% mortality was determined in Tondexir after 7 days. Ultimately, 14 days after treatment, the greatest rate of mortality recorded by Kanemite (1.25 ml/l with 84.6% mortality) and was not statistically different with Pestout (5 and 7.5 ml/l with 80.38 and 82.12% mortality, respectively), Oberon (80.46%) and Danisaraba (79.2%). Therefore, based on results, it can be concluded that Pestout (5 ml/l), Danisaraba, Kanemite (1.25 ml/l) and Oberon can recommend in controlling TSSM through interval on cucumber. |
| Keywords: |
| two spotted spider mite, greenhouse, cucumber, control, acaricides |
| Status : Paper Accepted (Poster Presentation) |
