Hyperspectral classification of poisonous solanaceous weeds in processing Phaseolus vulgaris L. and Spinacia oleracea L.

Lauwers, Marlies; Nuyttens, David; Cauwer, Benny De; Pieters, Jan

doi:10.1016/j.compag.2022.106908

Cited by 5 publications

(1 citation statement)

References 26 publications

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“…For example, phenmedipham and bentazon are crucial postemergence contact herbicides for controlling emerged poisonous solanaceous weeds, e.g., Datura stramonium L. (jimson weed), Solanum nigrum L. ssp. nigrum and Chenopodium album (fat hen) in processing spinach (Spinacia oleracea L.) and common bean (Phaseolus vulgaris L.) [18]. For satisfactory control, these weeds should be targeted no later than the 2-leaf stage.…”

Section: Introductionmentioning

confidence: 99%

Performance of Drift-Reducing Nozzles in Controlling Small Weed Seedlings with Contact Herbicides

De Cauwer,

De Meuter,

De Ryck

et al. 2023

Agronomy

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In many EU countries, spray applications should comply with increasingly stringent requirements regarding the drift reduction class of spray nozzles. Many farmers fear that the use of drift-reducing nozzles producing coarse droplet spectra may compromise the performance of contact herbicides on small weed targets. This study examined the effects of various ISO 03 drift-reducing flat-fan nozzles (pre-orifice and single and dual flat-fan air induction nozzles) differing in spray drift reduction class and spray pressure (2.5 bar, 5.0 bar) on (1) spray coverage, (2) droplet characteristics and (3) efficiency of contact herbicides bentazon and phenmedipham against cotyledon and 2-leaf stage plants of Chenopodium album and Solanum nigrum. Performance was compared to that of an ISO 03 standard flat-fan nozzle producing a finer droplet size spectrum. All sprayings were performed at a spray volume of 200 L ha−1. In most dose–response experiments, several drift-reducing flat-fan nozzles performed equally well as standard flat-fan nozzles, regardless of herbicide, spray pressure, growth stage or weed species. However, droplet size spectra of air-induction nozzles were too coarse for an adequate spray coverage and efficient application of contact herbicides on cotyledon stage plants of S. nigrum. In addition, the performance of air-induction nozzles in controlling difficult-to-wet C. album weeds with phenmedipham was better at 5.0 bar than at 2.5 bar. In contrast with droplet size characteristics, spray coverage characteristics determined on water sensitive papers were not good proxies for estimating the biological efficiency of contact herbicides. Air induction nozzles at 5.0 bar allow efficient control of 2-leaf targets, but nozzles emitting finer droplet spectra, such as pre-orifice nozzles, should be preferred for controlling cotyledon stage weeds at low-herbicide doses.

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Section: Introductionmentioning

confidence: 99%