Bulletin of Entomological Research (1963) 54, 349-359

G.J.W. Dean (1963)
Field trials with a persistent stomach insecticide against populations of the Red Locust, Nomadacris septemfasciata (Serv.), in an outbreak area
Bulletin of Entomological Research 54 (2), 349-359
Abstract: Sexually-immature adult populations of Nomadacris septemfasciata concentrate on the islands of grass which remain unburnt after the annual dry season fires in the outbreak areas located in Zambia and Tanzania. Emulsified dieldrin solutions were sprayed as stomach poison from aircraft over the whole of individual grass islands, and elsewhere, in a broad swath around the perimeter of the tall grass islands. Dosages of 2.9 and 4.5 oz. dieldrin per acre alike caused 90% mortality within four days by the first method. In the second method, 21-89% mortality occurred within 14 days, increasing with higher dosage but not with wider swath. The use of dieldrin as a stomach poison is complementary to the older method of spraying 20% DNC in oil. Whilst dieldrin is cheap and effective against background infestation, DNC must continue to be used against mobile swarms because of its rapid contact action.
(The abstract is excluded from the Creative Commons licence and has been copied from Acridological Abstracts with permission by NRI, Univ. of Greenwich at Medway.)
Link to article at publishers website

Research topic(s) for pests/diseases/weeds:
control - general

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Nomadacris septemfasciata		Tanzania
	Nomadacris septemfasciata		Zambia