Browsing by Subject "Pesticides"

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Comparison of hybrid rye and wheat for grain yield and other agronomic traits under less favourable environmental conditions and two input levels
(2025) Miedaner, Thomas; Lauenstein, Sophie; Lieberherr, Bärbel; Tan, Daniel
Agriculture in the European Union is constantly the subject of public debate, particularly concerning reduced mineral fertilisation and reduced chemical plant protection. Hybrid rye could play a special role in this context, as it usually requires less fertiliser and pesticides than winter wheat and has a high yield potential. In Germany, both crops can be grown on most sites. To test whether hybrid rye is competitive with winter wheat, a trial was conducted with 10 hybrid rye and 20 wheat varieties of all quality levels. The trial was grown for three years (2021, 2022, 2023) on three conventionally managed farms with 40–64 soil points (on a scale of 1–100) in south-west Germany. It was conducted with two input levels: I1, fertilisation (100–120 kg N/ha for hybrid rye; 140–180 kg N/ha for winter wheat), and chemical plant protection including growth regulators; I2, no chemical plant protection, and 20% reduced N fertilisation, one to three harrows. In eight out of nine location × year combinations, hybrid rye was significantly ( p < 0.001) superior to winter wheat in terms of grain yield under these conditions. On average, hybrid rye yielded 9.1 and 7.8 t ha −1 for I1 and I2, respectively, compared to 8.0 and 6.8 t ha −1 for wheat, respectively. A close correlation of the cultivar’s grain yield between I1 and I2 for both crops showed a missing cultivar × input level interaction. Under these conditions, hybrid rye produced higher grain yields and better baking quality than wheat in both input regimes, contributing to a more sustainable cropping system.
The roles of field assistant of pesticide company in Indonesia: a qualitative study
(2022) Yulianti, A; Istriningsih,; Dewi, Y A; Hanifah, V W; Herteddy, D; Suib, E; Sarwani, M
The pesticide market in Indonesia is highly competitive which leads the companies to constantly develop marketing strategies. Pesticide companies assign Field Assistants (FAs) to execute the promotional efforts and knowledge delivery to farmers to increase the sale. This study aimed to investigate FA roles as a promotional agent in technology dissemination to support their tasks in demand creation and technology adoption, respectively. The study was conducted from October to December 2020 in North Sumatra Province. Data was collected by interviewing individual FA representing five pesticide companies, both multinational and local companies. The descriptive qualitative method was used by employing an inductive theoretical model, then analyzed with coding techniques using NVivo. The result revealed that among 10 emerging roles from coding, the most dominant role was stakeholders’ engagement; whilst the least one was understanding farmers’ problems. The role also addressed an environmental issue through a stewardship program funded by the company. There were variations in the implementation of those roles among companies due to their limiting factors. Thus, FA roles are mainly working on promotional efforts embedded with extension activities in terms of knowledge transfer to farmers, technical advisory, on-farm demonstration plot, and expose or farmer field day.