Pest Management Science (2003) 59, 1250-1254

DiefAlla H. Al-Rajhy, Azzam M. Alahmed, Hamdy I. Hussein and Salah M. Kheir (2003)
Acaricidal effects of cardiac glycosides, azadirachtin and neem oil against the camel tick, Hyalomma dromedarii (Acari: Ixodidae)
Pest Management Science 59 (11), 1250-1254
Abstract: The cardiac glycoside, digitoxin, from Digitalis purpurea L (Scrophulariaceae), a cardiac glycosidal (cardenolide) extract from Calotropis procera (Ait) R Br (Asclepiadaceae), azadirachtin and neem oil from Azadirachta indica A Juss (Meliaceae) were tested for their effects against larvae and adult stages of the camel tick, Hyalomma dromedarii Koch (Acari: Ixodidae). The contact LC₅₀ values of the first three materials against adults were 4.08, 9.63 and >40.7 µg cm^-2, respectively, whereas the dipping LC₅₀ values of the four materials were 409.9, 1096, >5000 and >5000 mg litre^-1, respectively. Contact and dipping LC₅₀ values of the extract and azadirachtin against larvae were 6.16, >20.3 µg cm^-2 and 587.7 and >2500 mg litre^-1, respectively. Azadirachtin had no effects on egg production or feeding of adults up to 5000 mg litre^-1; however at 2500 mg litre^-1, it caused significant reduction in feeding activity of larve, prolonged the period for moulting to nymphal stage, and caused 60% reduction in moultability. Results of the two cardiac glycoside materials are comparable with those of several commercial acaricides. The risks and benefits associated with the use of cardiac glycosides are considered.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
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.
	Hyalomma dromedarii