| 摘要 |
An apparatus and method for measuring agricultural spray deposits and maximum liquid formulation retention on plant leaf surfaces are disclosed. The apparatus includes a first chamber having an annular seal mounted thereon which defines a first cavity, and a second separable chamber also having an annular seal thereon defining a second cavity. Each chamber also includes at least one access port communicating with that chamber's respective cavity, and are aligned with their annular seals juxtaposed in an opposable relationship. Releasable force application means are also provided for forcing the chambers together with the seals in an abutting relationship. In use, a leaf of the target plant is inserted between the annular seals and the chambers are forced together, retaining the leaf between the seals and forming first and second accessible compartments defined by the leaf and the cavities of the first and second chambers, respectively. Test liquid, such as an agricultural spray of interest or a solvent for spray residues, may then be applied into one or both compartments through the access ports to selectively contact the upper or lower leaf surface. Following contact with the appropriate leaf surface, the liquid may be recovered and assayed to determine the volume of liquid retained on the leaf surface, or for the presence or amount of agricultural spray deposits on the leaf.
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