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Effects on non-target organisms of insecticides used to control desert locust, Schistocerca gregaria

environmental impact in ecologically sensitive areas

Eriksson, Helena (2008). Effects on non-target organisms of insecticides used to control desert locust, Schistocerca gregaria. Uppsala : Sveriges lantbruksuniv.
ISBN 978-91-85911-42-4
[Licentiate thesis]

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Concern for environmental impact of chemical insecticides used for desert locust control has increased and improved knowledge about insecticide impact on faunal non-target organisms (NTOs) in the natural environments of the desert locust is needed. In this thesis, I investigated the impact of chlorpyrifos and carbosulfan on NTOs. I aimed at identifying species that were vulnerable to insecticides under natural conditions in a desert locust breeding area; the Red Sea Coast of Sudan. Survival rate, abundance, activity, density and species richness in a treated and an untreated area were compared using pre- and post-spray monitoring periods. Suitable reaction indicators and methodologies, which had potential for environmental monitoring of control operations, were sought. Juvenile prawns of Metapenaeus monoceros, (Penaeidae), in the mangrove lagoon were affected negatively by an aerial application of chlorpyrifos. Adverse effects were also detected on antlions, Cueta sp., (Myrmeleontidae), and hoopoe larks, Alaemon alaudipes, (Alaudidae), counted along transects. Negative effects, considered attributable to the insecticide application, were found using pitfall trapping for i) the beetle Mesostena angustata, (Tenebrionidae), ii) crickets both at the species level, Gryllus bimaculatus, and family level, Gryllidae, and iii) arachnids. Dung beetles (Scarabaeidae: Scarabaeinae and Aphodiinae) sampled in dung pats placed in the field showed a response to carbosulfan within 24 h after application against desert locusts. Abundance of Onthophagus margaritifer (Scarabaeinae) declined after spraying. Numbers of Aphodius lucidus (Aphodiinae) and Aphodiinae beetles at the subfamily level increased. There was a marked difference in dung beetle abundance and species richness between two biotopes; Acacia tortilis shrubland and cultivated wetland. The results suggest that the studied organisms and the applied methodologies (simple, robust, and low-cost) could be useful for environmental monitoring of desert locust control. Follow-up studies and refinements of the methodologies are suggested.

Authors/Creators:Eriksson, Helena
Title:Effects on non-target organisms of insecticides used to control desert locust, Schistocerca gregaria
Subtitle:environmental impact in ecologically sensitive areas
Year of publishing :2008
Number of Pages:38
ALLI. Eriksson, H. & Wiktelius, S. Impact of chlorpyrifos used for desert locust control on non-target organisms in mangrove, an ecologically sensitive area. (Manuscript) II. Eriksson, H. & Isaksson, D. Short term assessment of dung beetle response to insecticide treatment against desert locust. (Manuscript)
Place of Publication:Uppsala
ISBN for printed version:978-91-85911-42-4
Publication Type:Licentiate thesis
Full Text Status:Public
Agrovoc terms:insecticides, chlorpyrifos, schistocerca gregaria, pest insects, environmental impact, side effects, prawns and shrimps, birds, tenebrionidae, gryllidae, arachnida, scarabaeidae, dung beetles, biodiversity, mangroves, monitoring, arid zones, sudan
Keywords:Penaeidae, Alaudidae, Myrmeleontidae, Scarabaeidae, Tenebrionidae, Gryllidae, arachnids, mangrove, arid, breeding area, monitoring, pest.
Permanent URL:
ID Code:1739
Department:(NL, NJ) > Dept. of Ecology
(S) > Dept. of Ecology
Deposited By: Helena Eriksson
Deposited On:12 Jun 2008 00:00
Metadata Last Modified:02 Dec 2014 10:13

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