Agrochemicals application in soybean crop (Glycine max L Merr). Evaluation of the effect of different techniques on distribution efficiency
Soybean production conditions under no-tillage system increases the risk of developing fungal diseases. Field trials were carried out to evaluate application technologies efficiency and spray penetration in different levels of soybean canopy at R4 stage. Conventional flat fan XR110015 (AP), hollow cone 30HCX6 (HC) and air induction 110015 (AI) nozzles and two carrier volumes, 90 l ha-1 (BV) and 130 l ha-1 (AV) were evaluated. Water sensitive cards were placed on artificial supports in the upper (ES), middle (EM) and lower canopy (EI) levels in a randomized block design. Drops density, coverage area, efficiency and volume median diameter were recorded. AV and CH nozzles had significantly higher drops density than AP and AI in the upper side of artificial support at EM and EI levels, but differed only from AI with BV. CH nozzles had lower coverage than AI in EM and EI level with AV carrier and AI at EM level in BV. AI nozzles reach the highest product recovery rate at EM (28,83 – 18,67%) and EI (11,33 - 8,78%) in both AV and BV respectively. All nozzles had a very low efficiency to reach the underside leaves in the middle and lower level of the crop. This could be the reason of poor diseases control in those positions.
| Main Authors: | , , , , , , |
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| Format: | Digital revista |
| Language: | spa |
| Published: |
Facultad de Ciencias Agrarias y Forestales de la Universidad Nacional de La Plata
2018
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| Online Access: | https://revistas.unlp.edu.ar/revagro/article/view/7320 |
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