Efficacy of new insecticides against pod borer on soybean.
2009
Keyhaniyan, A`li Akbar | Barari, Hassan | Qadiri Rad, Sa`id | Sharifi Ziveh, Parviz | A`ttaran, Mohammad Reza | Espahbodi Niya, A`bd Ol-Ali | Mohammadi Pur, A`li | Ahmadi, Mohammad | Saqqaei Niya, A`raz Mohammad | Heydar Zadeh, E. | Panj A`li Zadeh, Teymur
The soybean pod borer, Helicoverpa armigera is one the most important pest's of soybean in Iran. In recent years, the chemical control of this pest has become difficult because of less effect of the common insecticides. Therefore, the efficacy of the common and new insecticides from Sumitomo and Keshtgar companies on the pest larvae were tested in a Randomized Complete Blocks Design with six treatments and a control (only water) in four replications in three provinces, Ardebil, Golestan and Mazandaran during 2007-2008.The treatments were Sevin (carbaryl) (3kg/ha), Avaunt (indoxacarb)SC15 (250ml/ha), EC15 (250ml/ha),Pridalyl (sumipleo) EC50 (200ml/ha), Pridalyl (sumipleo)EC50(150ml/ha) and Tracer(spinosad) SC24 (150ml/ha). Insecticide application was carried out when the most pest eggs were hatched and very young larvae started feeding on terminal and apical buds and pods. Sampling and counting live larvae was done a day before and 1, 3, 7, and 10 days after treatment by randomly selected 10 plants from four middle rows in each replication. Data were analyzed with SAS software, the means were compared using Duncan and the larval mortality was calculated by Henderson- Tilton formula. The results of seven and ten days after insecticide application showed a significant difference among treatments at 1% and 5% level. Indoxacarb SC15 (250ml/ha.) and Carbaryl Avaunt EC15(250ml/ha) were both the most effective treatments and placed in the first group (A), Indoxacarb EC15(250ml/ha), Pridalyl EC50 (200ml/ha) and Pridalyl EC50 (150ml/ha) in second group (B) , wile Tracer SC24 (150ml/ha) placed in third group.
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