Effects of different application timings on insecticide efficacy against the European corn borer (Ostrinia nubilalis Hbn)
2018
Franeta, Filip | Milovac, Željko (http://orcid.org/0000-0002-6152-6538) | Tančić-Živanov, Sonja | Lalošević, Mirjana | Stanisavljević, Dušan | Vuković, Slavica | Petrić, Dušan
Maize (Zea mays L.) is the most widely grown crop in Serbia, while the European corn borer (Ostrinia nubilalis Hbn) is one of the most detrimental species. The larvae of the Europen corn borer (ECB) feed on almost all parts of maize plants causing severe damage to agricultural production. An integrated pest management approach should be implemented to manage this insect species. However, chemical treatment is the most commonly used method for the control of the ECB. The efficacy of various insecticides deployed for this purpose depend not only by the type of the active ingredient, but also by the used amount, type of application and most importantly application timing. The aim of this study was to evaluate the optimal application timing for achieving the highest efficacy rate against this pest. For this purpose an insecticide based on Chlorantraniliprole + Lambda-cyhalothrin was used in three application timings: one at the beginning of the ECB flight period, labelled as 'early' treatment, the second during the peak flight, labelled as 'regular' treatment, and the third two weeks after the peak flight, labelled as 'late' treatment. The results of the trial showed that the 'early' and 'regular' treatments provided the highest efficacy against the ECB, while the 'late' treatment had a significantly lower efficacy. The highest positive effects on yield were observed in the 'early' treatment. The 'late' treatment had a higher impact on yield in both years when compared to the 'regular' treatment.
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