Benzine and alum were suggested for removing insects; diatomaceous earth and material similar to cat litter are still common for removing infestations.
Local residents detailed to me the consequences of drinking and bathing in benzine-spiked water over the years: skin conditions, birth deformities, cancers.
They would have had to stop about every 15 or 20 miles for gas, purchasing bottles of benzine, also known as ligroin, that was usually available from pharmacies.
A large quantity of benzine was poured on the remains and set alight, with tar thrown on to assist with the burning, which resulted in great clouds of black smoke.