Abstract
Abstract S-ethyl dipropylthiocarbamate (EPTC, 2.24 kg/ha) inhibited epicuticular wax production by developing leaves of cabbage (Brassica oleracea L. capitata group cv. Market Prize). Similar inhibition of wax deposition was observed on abaxial (66.5%) and adaxial (67.5%) leaf surfaces. Wax bloom was absent on EPTC-treated plants, and its absence was associated with a marked reduction in surface fine-structure. No significant changes in cuticle thickness, structure, or morphology were observed due to EPTC-treatment as indexed by staining with Sudan III and IV and viewing with plane-polarized light. EPTC did not significantly affect the total weight of the cuticular membrane, cuticular wax, or cutin matrix, but there was a significant increase in the carbonate plus water soluble fraction (+33.4 μg/cm2), which approximately equaled the decrease in epicuticular wax weight (–28.8 Mg/cm2).
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