Knapsack sprayers: effort required for pumping lever operation

Lambrecht, Edson; Rosa, Douglas Silva da; Machado, Roger; Machado, Antônio Lilles Tavares; Reis, Ângelo Vieira dos

doi:10.1590/0103-8478cr20181012

Cited by 1 publication

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“…The relevance and the utilization of knapsack sprayers corroborated with the increasing demand of same resulted from growing concern in the application of pesticides (insecticides, fungicides and herbicides) on the farm to aid optimum yield of agricultural products and also, for fumigations in residential areas for health reason can in no way be over emphasise in the black nations of the world in which Nigeria is not exempted. [1] Lambrecht et al (2019) reported that manually operated knapsack sprayers are utilised to introduce various products like pesticides and bio-fertilizers that are enlisted in the phytosanitary control phase in diverse arable crops. Spray discharges are made by initiating and releasing liquid particles in order to control pests, increase productivity in farms, and collaborate with the world agricultural production.…”

Section: Introductionmentioning

confidence: 99%

“…Knapsack sprayers are employed on a large scale by small, medium, and large farmers as a result of their sizeable adaptability. This equipment has features that meet the existing needs in rural settings, as they have a low purchasing cost and permit products to be applied in individual societies [1]. A hand operated sprayer is a continuous type of sprayer with a fairly constant discharge rate.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Operations of Knapsack Sprayer and Its Impacts on Physiological Parameters of Selected Operators

Afolabi¹,

Adejumo²,

Atere³

et al. 2023

ENG

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The study was aimed at determining the impacts of operating Manually Operated Hand Lever Knapsack Sprayers (MOHLKS) on physiological responses of the operators as dependent on anthropometric variations and sex. Twenty eight subjects, (4 female, 24 male) Mean ± SD: Age 22.5 ± 1.92, 24.29 ± 2.2 years; Body Mass Index 24.6 ± 4.8, 21.7 ± 2.4 kg/m 2 were employed in the study. Selected anthropometric parameters of weight and height were used to determine body mass index (BMI), with these are arm-reach forward, elbow to fingertip, hand length and hand width were measured to establish human variations in diversity. Subjects undertook the operation at 5 replicates each, before and after which information about operators' body pain locations and body physiological changes of heart rates were obtained. Measured parameters were used in the determination of expended energy (EE), physiological cost (PC), oxygen intake (VO 2 ) and aerobic power (VO 2 max). Alongside with these were operational parameters of stroke, pace and time taken to get the operation done and environmental factors of temperature and relative humidity. The results revealed on the average that the BMI (24.61 ± 4.78 kg/m 2 ) in female operators was higher, this corresponded to PC and VO 2 , while the VO 2 max (34.83 ± 3.30 ml/min/kg) in males is higher. More EE was obtained in female subjects (3.53 ± 3.76 kCal/min) as compared to male subjects (3.42 ± 7.48 kCal/min). The main effects plot of operational factors on EE displayed the stroke made by the subjects during spraying operation as parameter with largest effect on EE. Regression equation for EE and PCI is given as PCI = 1.97 + 25.2 EE, while the P-value at α = 0.05 is 0.000 and R 2 = 98.8%. Post operational body pain showed that 19 out of 28 subjects incurred at least one type of body pain, with shoulder pain as most frequent. The results of the study suggest that early incidence of fatigue may occur in female operators as How to cite this paper:

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%