Effect of fipronil seed treatments on the germination and early growth of rice

Influence of imidacloprid seed treatments on rice germination and early seedling growth

“…The experiment was replicated 3 times for each of four cultivars, Millin, Kyeema, M201 and Koshihikari, using a total of 1080 plants. Although not evaluated in experiments 1 to 3, the cultivar Millin was included in experiments 4 to 6 to allow a more valid comparison between the results of this study and an earlier study on fipronil seed treatments13 where longer‐term effects on plant growth were primarily evaluated using Millin and Kyeema.…”

“…The effects of fipronil seed treatment on the germination and growth of rice were investigated in an earlier paper13 using similar methodology to the present study. Although there was some variation between the groups of cultivars assessed in the two studies, the differences between the effects of the two chemicals highlight the variability in the response of rice to seed treatment.…”

“…186BA2005; Bayer CropScience Australia, Melbourne) was used in six separate experiments to determine the influence of imidacloprid seed treatment on the germination and growth of rice cultivars. The methodology used in all experiments was based on that previously used to evaluate plant responses to fipronil seed treatments 13. Sixteen rice cultivars were used during the study, ten of which were Australian commercial or experimental cultivars (Amaroo, Opus, Paragon, Illabong, Kyeema, Langi, YRB4, Quest, Reiziq and Millin).…”

“…Seeds were sown onto the soil surface (6 × 3 arrangement) in translucent HDPE trays (155 × 102 × 70 mm height) containing a 30 mm layer of ground and autoclaved topsoil (Birganbigil clay/loam)15 flooded to a depth of 20 mm with 1× Martin's rearing solution,16 a salt solution containing 75 mg L −1 total dissolved solids. This solution was originally developed for culturing aquatic insects, but has also been shown to be effective for rice plant culturing above soil substrates 13. The containers were placed in a seed germination cabinet (Thermoline, Sydney; 28 ± 1 °C:20 ± 1 °C, 12:12 cycle; 15:9 h light:dark illumination), and identical HDPE trays were then inverted over the plant containers to diffuse the light and reduce evaporation.…”