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The prevention of plagues of the red locust nomadacris septemfasciata






Acrida 7(1): 55-78

The prevention of plagues of the red locust nomadacris septemfasciata

In recent years the number of areas known to be capable of producing swarms of the red locust, N. septemfasciata, from an indigenous non-swarming population has increased, while the ability of the control organization to prevent swarms escaping has declined. This paper reviews the characteristics of the outbreak areas and examines the situations in which swarm escape is most likely to lead to a plague. There appears to be no way in which a potential outbreak area can be recognized on ecological grounds but the chance of a plague starting from presently unsuspected source is probably small. Some situations in which a known outbreak area can be discounted as a source of swarms in the immediate future can be recognized easily. Whether or not a plague occurs is likely to depend on the number and size of the escaping swarms and their movement, rather than on the weather in the invasion area. This suggests that some of the recognized outbreak areas are more likely than others to start a plague but, on present knowledge, none can be completely discounted. The current strategy of attempting to prevent swarm escape from the recognized outbreak areas is proving difficult to carry out for logistic and political reasons. However, the prerequisites for a strategy of tracking and destroying swarms after they have escaped do not exist over most of the invasion area. A strategy of plague termination by massive control in the major plague breeding areas might well fail and would in any case be more technically and politically difficult than the current outbreak area control policy, and would be likely to cost more. Similar objections apply to a policy of attempting to control the plague in one part of the invasion area only, with the partial exception of South Africa.


Accession: 006740628



Related references

Symmons, P.M., 1977: The prevention of plagues of the red locust, Nomadacris septemfasciata (Serv.). Studies in recent years have shown that the number of areas known to be capable of producing swarms of Nomadacris septemfasciata (Serv.) from an indigenous non-swarming population has increased, while the ability of control organisations to preven...

Bahana, J.W.; Byaruhanga, E.K., 1999: Advances and review of strategies for red locust plague prevention: the control of red locust, Nomadacris septemfasciata (Serville) into the 21st century. This paper gives an account of the activities of the International Red Locust Control Organization for Central and Southern Africa (IRLCO-CSA) in the management of the red locust (Nomadacris septemfasciata), other locust species and non-locust mig...

Shulov, As, 1970: The development of the red locust Nomadacris septemfasciata (Serv.), and the African migratory locust Locusta migratoria migratorioides (R. and F.), and its interruption under particular conditions of humidity

Bahana, J.W.; Ngazero, A.K., 1999: A locust plague in the making: upsurges of the red locust, Nomadacris septemfasciata (Serville) in Buzi-Gorongosa outbreak area, Mozambique in 1996. In 1996, many swarms of red locust, Nomadacris septemfasciata (Serville), formed in the Buzi-Gorongosa outbreak area in Mozambique. Some of these swarms migrated and crossed international boundaries, on a scale not seen since the last plague of 19...

Shulov, A.S., 1970: The development of eggs of the red locust Nomadacris septemfasciata (Serv.), and the African migratory locust Locusta migratoria migratorioides (R. and F.), and its interruption under particular conditions of humidity. The following is virtually the author's summary. Experiments were carried out in the laboratory in Israel on the development of embryos of Nomadacris septemfasciata (Serv.) and Locusta migratoria migratorioides (R. & F.) under controlled cond...

Albrecht, F.O., 1956: The anatomy of the red locust (Nomadacris septemfasciata Serville). Anti-Locust Bulletin, no. 23: 1-9

Materu M.E.A., 1984: The ecology and control of the red locust nomadacris septemfasciata. Insect Science & its Application 5(2): 79-82

Norris, M.J. \mrs. O.W.Eichards Norris, M.J., 1959: Reproduction in the red locust (Nomadacris septemfasciata Serville) in the laboratory. The following is virtually the author's summary. The effects of crowding and isolation on the duration of hopper life and on adult weight, colour and morphometrics of Nomadacris septemfasciata (Serv.) are compared. Locusts emerging as adults...

Richards, O.W., 1953: The Study of the Numbers of the Red Locust Nomadacris septemfasciata (Servllle). The following is virtually the author's summary. Methods of estimating the numbers of adults of Nomadacris septemfasciata (Serv.) were studied in the Eukwa Valley of south-western Tanganyika in July-September 1952. The two principal methods a...

Materu M.E.A., 1985: Control of the red locust nomadacris septemfasciata in africa in the seventies. This review summarizes the work of the International Red Locust Control Organization for Central and Southern Africa (IRLCO-CSA) in the control of the red locust (Nomadacris septemfasciata, Serville) in tis outbreak areas in Central and Southern A...