Sinharaja Rainforest leech defense: canvas leech socks, tobacco water, and trail precautions?

Terrestrial land leeches (Haemadipsa zeylanica and the larger Haemadipsa ornata) are abundant in the leaf litter of Sinharaja, detecting approaching warm-blooded mammals via ground vibrations and carbon dioxide cues. Standard cotton socks are easily penetrated by leech mouthparts. The primary defense is wearing knee-high anti-leech socks woven from tightly woven, unbleached canvas or calico, pulled over trousers and laced tightly below the knee. Spraying boots and lower gaiters with a concentrated natural solution of steeped tobacco leaves or eucalyptus oil repels leeches effectively.