The disorder of potato tubers (Solanum tuberosum var. Russet Burbank) called "hollow heart" is manifested by the occurrence of hollow regions in internal parts of the tuber. The structure and composition of the suberin from the tissue lining of these internal cavities were determined by gas
Choice bioassays were used to determine repellency of homologous n-alkanes (C(8)H(18)-C(21)H(44)) to spider mites. When tested at 400 μg/cm(2), the C(15)-C(19) alkanes were highly repellent; the C(16) n-alkane, n-hexadecane, was most repellent. Subsequently the EC(50) values, the concentration at
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