The Action of Certain Halogen Compounds on the Potato Eelworm, Heterodera schachtii

Considerable work has been done in Germany in recent years on the use of bleaching powder in controlling the sugar-beet strain of the nematode Heterodera schachtii. Laboratory work with a view to discovering the manner in which the chemical affects the nematode has been carried on extensively for some years by Molz, who concludes that the nematodes are stimulated to hatch by the supply of an abundance of oxygen, and are furthermore thigmotactically attracted and killed, so that, in the absence of suitable host plants, a large proportion of the nematode population may be destroyed.