Drift curves from spray applications on commom bean crop

Abstract

In order to avoid the occurrence of drift in pesticide applications, it is fundamental to know the behavior of sprayed droplets. This study aimed to determine drift curves in pesticide applications on common bean crop under brazilian weather conditions, using different nozzle types and compared them with the "German" and "Dutch" drift prediction models. The experiment was conducted in Uberlândia, Minas Gerais/Brazil, in completely randomized design with ten replications and 4 x 20 split-plot arrangement in space. Drift deposited on collectors located over ground level was resulted by 150 L ha-1 carrier volume applications through four nozzle types (XR 11002 (fine droplets); AIXR 11002 (coarse droplets); TT 11002 (medium droplets); TTI 11002 (extremely coarse droplets)), collected in 20 downwind distances, parallel to the crop line outside the target area, spaced by 2.5 m. The tracer rhodamine B was added to the spray to be quantified by fluorimetry. Drift prediction models adjusted by exponential functions were obtained considering the 90th percentile for XR, TT, AIXR and TTI nozzles. It is suggested to use the estimated drift models from this study for each nozzle type in drift prediction evaluations on bean crops under brazilian weather conditions.

Dust drift during mechanical and pneumatic wheat sowing and insights into the physicochemical characteristics of the abraded dust

“…As expected, the average ground depositions with both seeders generally decreased with increasing distance from the sowing area (Table 4). Highest depositions generally were measured in the first few metres of the downwind area, as reported in various studies, 8,31–34 but dust drift percentages were much lower than spray drift values from horizontal boom sprayers 35–37 . This decrease in a.i.…”

“…Highest depositions generally were measured in the first few metres of the downwind area, as reported in various studies, 8,[31][32][33][34] but dust drift percentages were much lower than spray drift values from horizontal boom sprayers. [35][36][37] This decrease in a.i. deposited on the ground with increasing distance from the seeder generally is attributed to the coarse particles tending to deposit on the ground close to the drill.…”

Spray Drift and Caterpillar and Stink Bug Control From Aerial Applications With Electrostatic Charge and Atomizer on Soybean Crop

“…From the regression analysis, it can be observed that the power model showed good adjustment to the data. These models allow knowing the covered distances by the droplets after their generation, being very useful for the study of the environmental impact on applications and for the determination of the safety strips (Bueno et al, 2016).…”

Environmental risk for aquatic and terrestrial organisms associated with drift from pesticides used in soybean crops

“…H o w e v e r, s t u d i e s i n v o l v i n g t h e environmental risk, mainly due to drift, are still sparse, although there are already some models of drift forecasting that have recently been developed for the cultivation of coffee (Alves andCunha 2014), beans (Bueno et al 2016a) and soybeans (Bueno et al 2016b).…”