caa a22 4500 388105372 CHVBK 20180307125336.0 cr unu---uuuuu 161130e199912 xx s 000 0 eng 10.1017/S1742758400018890 doi S1742758400018890 pii (NATIONALLICENCE)cambridge-10.1017/S1742758400018890 The Bahi Plains—An Additional Red Locust Outbreak Area in Central Tanzania? [Elektronische Daten] Gregarious swarms of red locust, Nomadacris septemfasciata (Serville) capable of causing loss to agriculture originate from specific breeding areas in eastern and central Africa often referred to as outbreak areas. Typically these areas are poorly drained grassland plains that flood during the wet season and then dry out, creating sites for egg laying and stimulating growth of specific types of vegetation necessary for nymphal survival. During 1996, a significant upsurge of red locust occurred throughout central and western Tanzania. Populations also appeared in the Bahi Plains west of Dodoma, an area where significant infestations of red locust had not been recorded since the major plague of 1930-1944. Aerial spraying controlled 13,700 ha of nymphal bands and swarms. The 1996 upsurge could have been caused by a number of contributing factors: a prolonged drought leading to changes in vegetation; possible changes to flood water levels through diversion for irrigation; and either an undetected movement of red locust into the area from outside or localised breeding over several seasons. As a result of this outbreak the Bahi is likely to remain as a possible source of red locust swarms in the future and should be monitored closely. Copyright © ICIPE 1999 criquet nomade nationallicence les aires grégarigènes nationallicence Nomadacris septemfasciata nationallicence la Tanzanie nationallicence Bahi nationallicence IRLCO-CSA nationallicence red locust nationallicence outbreak area nationallicence Nomadacris septemfasciata nationallicence Tanzania nationallicence Bahi nationallicence IRLCO-CSA nationallicence Spurgin P. A. Australian Plague Locust Commission, GPO Box 858, Canberra, A.C.T Australia 2601 Chomba R. S. K. Ministry of Agriculture, Plant Protection Dept. P.O. Box 9071, Dar es Salaam, Tanzania International Journal of Tropical Insect Science Cambridge University Press 19/4(1999-12), 277-282 1742-7584 19:4<277 1999 19 JTI https://doi.org/10.1017/S1742758400018890 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1017/S1742758400018890 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Spurgin P. A. Australian Plague Locust Commission, GPO Box 858, Canberra, A.C.T Australia 2601 NATIONALLICENCE 700 1- Chomba R. S. K. Ministry of Agriculture, Plant Protection Dept. P.O. Box 9071, Dar es Salaam, Tanzania NATIONALLICENCE 773 0- International Journal of Tropical Insect Science Cambridge University Press 19/4(1999-12), 277-282 1742-7584 19:4<277 1999 19 JTI CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-cambridge