Modifications of a hydraulic sprayer (Hardi) for improved coffee spraying
Most of the spraying units that are introduced into East Africa for the purpose of coffee spraying are not suitable in one respect or another. The effect of the emitted spray of new equipment either lacks evenness or penetration: adjustments to spray varying stands of coffee are seldom provided for. In the past few years, attempts have been made to improve the performance of sprayers. In this particular work a hydraulic sprayer has been modified. Recent research on the spray requirements for CBD control were considered in the new design. It can be assumed, that when using a high standard of spray cover as that needed for CBD control, the resultant pattern of spray distribution will give excellent cover for leaf rust or insect control. The modified unit greatly improved the level of cover attained as compared to the original unit. A larger percentage of deposit was recorded in the higher standards and all branches that were randomly sampled had adequate cover. The most useful result in terms of direct saving in application cost was the reduction of volumes applied per unit area without any loss in efficiency. The modification also provided for flexibility of use in various plantings of different heights, density and configuration. The demonstration on the feasibility of using lower hydraulic pressures suggest that only limited wear of pump parts will occur and also that tractors with a lower power output can be used
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| Format: | biblioteca |
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1972
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| Subjects: | EQUIPO, EQUIPO DE FUMIGACION, METODOS, PULVERIZACION, VOLUMEN, CONTROL DE HONGOS, ENFERMEDADES FUNGOSAS, COLLETOTRICHUM, MAQUINARIA HIDRAULICA, PULVERIZADORES, COLLETOTRICHUM COFFEANUM, |
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| Summary: | Most of the spraying units that are introduced into East Africa for the purpose of coffee spraying are not suitable in one respect or another. The effect of the emitted spray of new equipment either lacks evenness or penetration: adjustments to spray varying stands of coffee are seldom provided for. In the past few years, attempts have been made to improve the performance of sprayers. In this particular work a hydraulic sprayer has been modified. Recent research on the spray requirements for CBD control were considered in the new design. It can be assumed, that when using a high standard of spray cover as that needed for CBD control, the resultant pattern of spray distribution will give excellent cover for leaf rust or insect control. The modified unit greatly improved the level of cover attained as compared to the original unit. A larger percentage of deposit was recorded in the higher standards and all branches that were randomly sampled had adequate cover. The most useful result in terms of direct saving in application cost was the reduction of volumes applied per unit area without any loss in efficiency. The modification also provided for flexibility of use in various plantings of different heights, density and configuration. The demonstration on the feasibility of using lower hydraulic pressures suggest that only limited wear of pump parts will occur and also that tractors with a lower power output can be used |
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