Journal of Pest Science (2006) 79, 11-15

A.S. Abdel-Razek (2006)
Infectivity prospects of both nematodes and bacterial symbionts against cotton leafworm, Spodoptera littoralis (Biosduval) (Lepidoptera: Noctuidae)
Journal of Pest Science 79 (1), 11-15
Abstract: A study was made on the susceptibility of the cotton leafworm, Spodoptera littoralis (Biosd.), to the nematode, Steinernema carpocapsae (All) and Heterorhabditis bacteriophora. Three concentrations of each nematode species were used (75, 150, and 300 infective juveniles) for each treatment. The nematode, H. bacteriophora, gave 100% mortality 96, 90, and 48 h, respectively, post-treatment of S. littoralis larvae with 75, 150, and 300 infective juveniles. On the other hand, S. carpocapsae (All) gave 100% mortality 120, 90, and 56 h post-treatment, respectively. Therefore, H. bacteriophora was more potent against cotton leafworm than S. carpocapsae. Studies on the infestation intensity of the nematode species against the cotton leafworm showed the predominance of H. bacteriophora over S. carpocapsae, while in studies of the reproductive rate those of S. carpocapsae predominate. The bacterial symbionts of each nematode species were isolated and tested alone against cotton leafworm at concentrations ranging between 1×10² and 5×10³ bacterial cells/larva. The results showed a higher activity of Photorhabdus luminescens than that of Xenorhabdus nematophilus.
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Link to article at publishers website

Research topic(s) for pests/diseases/weeds:
biocontrol - natural enemies
Research topic(s) for beneficials or antagonists:
evaluation - screening - selection

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Spodoptera littoralis
Steinernema carpocapsae/Xenorhabdus nematophila (entomopathogen)	Spodoptera littoralis
Heterorhabditis bacteriophora/Photorhabdus (entomopathogen)	Spodoptera littoralis