Suppression of ostrinia nubilalis in corn with UAV - spray application

Stojanović, Zoran and Alvirović, Momir and Đorđević, Gordana and Petrović, Mladen and Cvijanović, Vojin (2024) Suppression of ostrinia nubilalis in corn with UAV - spray application. In: Proceedings of the XV International Scientific Agricultural Symposium “Agrosym 2024”. Faculty of Agriculture, East Sarajevo, pp. 766-772. ISBN 978-99976-816-8-3

Text Stojanović, Alvirović, Đorđević, Petrović, Cvijanović - Agrosym 2024.pdf - Published Version Available under License Creative Commons Attribution Non-commercial No Derivatives. Download (530kB)

Abstract

The corn borer (Ostrinia nubilalis), along with the cotton bollworm (Helicoverpa armigera) and the western corn rootworm (Diabrotica virgifera), is one of the most important corn pests. Over 600,000 hectares planted in corn in Serbia are threatened by this pest. Crop height and a lack of adequate machinery limit the effective control of this pest. In order to explore the possibility of suppressing corn borer by using unmanned aerial vehicles (UAVs) for crop protection, an experiment was conducted at the location of Sremska Mitrovica (Glac) close to the Sava River (44.953980, 19.664681). The date of the treatment was determined taking into account the intensity of the moth flight and the threshold. Treatments with the DJI AGRAS T30 drone were performed on 17 June 2022 and 20 July 2022 with 15 l/ha of working liquid with insecticide based on chlorantraniliprole (150 ml/ha), with the addition of adjuvant agent. In addition to the yield, the researchers also analyzed the place where the larvae of the corn borer penetrated into the stalk and the cob, the position of the hole in the trunk, cob damage, cob disease, and the number of pupae in the stalk. Within the trial variants, three randomized repetitions were designed in the form of microplots. The laboratory analysis of the sampled corn plants showed that the average yield in the control was 5.18 t/ha, while in the treatment it was 6.94 t/ha, which was a difference of 34% due to cob damages and diseases, stalk breakage and all other symptoms found only in the untreated variant. The difference in yield shows that the drone treatment is effective and economically justified.

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