Search Results (2)

The mung bean (Vigna radiata (Linn) Wilczek.) is a major grain crop in China, but its yield is significantly impacted by weeds. However, no pre-emergence herbicides are registered for mung bean fields in the China Pesticide Information Network. Screening for efficient and safe pre-emergence herbicides could improve mung bean production efficiency. In this study, six pre-emergence herbicides were selected: 480 g/L alachlor (1935.00 g a.i ha⁻¹), 720 g/L metolachlor (1620.00 g a.i ha⁻¹), 100 g/L imazethapyr (100.50 g a.i ha⁻¹), 338 g/L oxadiazon (507.00 g a.i ha⁻¹), 330 g/L pendimethalin (144.00 g a.i ha⁻¹), and 480 g/L trifluralin (720.00 g a.i ha⁻¹). Through Petri dish screening, a spraying treatment was carried out before seed germination. By measuring the root length and shoot length, imazethapyr (100.50 g a.i ha⁻¹) and oxadiazon (507.00 g a.i ha⁻¹) were screened out. They were applied to potted plants and sprayed after sowing. The results showed that imazethapyr (100.50 g a.i. ha⁻¹) and oxadiazon (507.00 g a.i. ha⁻¹) had no inhibitory effect on the growth and development of the mung bean. Subsequently, experiments were conducted with imazethapyr (100.50 g a.i ha⁻¹) and oxadiazon (507.00 g a.i ha⁻¹) applied in the field. Compared to the control, under imazethapyr (100.50 g a.i ha⁻¹) and oxadiazon (507.00 g a.i ha⁻¹), the agronomic traits, photosynthetic pigment content, yield, and yield components were not inhibited; the activities of superoxide dismutase, peroxidase, and catalase were increased; and gas exchange and chlorophyll fluorescence were not inhibited. In addition, soil urease activity decreased and soil invertase and alkaline phosphatase activity increased after 60 d of treatment. In summary, imazethapyr and oxadiazon can effectively control weeds and increase mung bean yield. The purpose of this study is to screen out safe and efficient pre-emergence herbicides suitable for the Shanxi mung bean, which is of great significance due to its large-scale planting industrialization and the development of advantageous industries. Full article

The increasing utilization of nanoparticles (NPs) in agricultural practices has led to a surge in demand for nano-based products. Herein, we investigate the dose-dependent impacts of nickel hydroxide (Ni(OH)₂)/nickel (Ni) NPs, synthesized using Asparagus racemosus Linn. leaf extract, on the seed germination and growth of Vigna radiata (Linn.) Wilczek. In all seed samples, 100% germination was observed in Treatment 1 (2.74 mg mL⁻¹) and Treatment 2 (5.48 mg mL⁻¹) of Ni/Ni(OH)₂ NPs. However, in Treatment 3 (8.22 mg mL⁻¹) and Treatment 4 (10.96 mg mL⁻¹), the germination percentage was lower, reaching 80%. Further, Treatment 5 (13.70 mg mL⁻¹) of Ni/Ni(OH)₂ NPs showed a reduced germination rate of 60%, indicating a prolonged germination process at higher concentrations. Remarkably, the length of seedlings showed a significant increase in all experimental treatments compared to the control group, which received 5 mL of distilled water. Among the investigated parameters, Treatment 2 demonstrated the most promising outcomes, exhibiting the highest chlorophyll stability index (23.73%) and membrane stability index (67.89%) values, as well as the lowest root ion leakage (24.75%). These findings indicate that Ni/Ni(OH)₂ has the capacity to enhance seed germination and foster seedling growth. Full article