FATE OF PENTACHLOROPHENOL IN COTTON

Pentachlorophenol (PCP) or its metabolites accumulated in quantities up to 2 p.p.m. in cottonseed kernels of bolls which were closed when sprayed, but was not detected in kernels from open bolls on the same cotton plants. Injecton of closed bolls with formulated PCP in diesel oil produced abortion of seed, but seed weight was not correlated with PCP content. When applied as single droplets to leaf blades, PCP accumulated in the glandular hairs along the veinlets, thus reducing the quantities translocated. Oat seedlings grown in pots with gram quantities of burrs which contained 11.9 p.p.m. of PCP equivalents did not absorb above 0.5 microgram. © 1969, American Chemical Society. All rights reserved.