Nekrasova, Z.N. 1938 Field tests of hydrogen sulfide as a control of the San José scale.. Review of Applied Entomology 26: 481.

Notes: In fumigation experiments in North Caucasus, 100% mortality of the San José scale (Aspidiotus perniciosus, Comst.) on grafting slips of apple, pear, plum and sloe was obtained in the second half of April by using hydrogen sulphide.