He emigrated to South Africa during 1949, and from then until 1954 was a researcher at the International Locust Control Centre at Cape Town University, investigating methods of locust control and going on expeditions to the Kalahari Desert, the Knysna Forest, the Belgian Congo and Mozambique.
22.
He emigrated to South Africa during 1949, and from then until 1954 was a researcher at the International Locust Control Centre at Cape Town University, investigating methods of locust control and going on expeditions to the Kalahari Desert, the Knysna Forest, the Belgian Congo and Mozambique.
23.
Nontarget effects on some insects ( predatory and detritivorous beetles, some parasitic wasps and bees ) were also found in field trials of fipronil for desert locust control in Mauritania, and very low doses ( 0.6-2.0 g a . i . / ha ) used against grasshoppers in Niger caused impacts on nontarget insects comparable to those found with other insecticides used in grasshopper control.
