Susceptibility of non-target aquatic macro-invertebrates and vertebrates to Piper guineense (Piperaceae) and Spilanthes mauritiana (Asteraceae) powder in Kilifi District, Kenya

Spala Oduor Ohaga, I. O. Ndiege, S. S. Kubasu, John C Beier, C. M. Mbogo

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Powders of Piper guineense and Spilanthes mauritiana, potential mosquito larvicides, were assessed to determine their impact on non-target aquatic macro-invertebrates and vertebrates. Field tests were conducted in Kilifi District Kenya on field populations of damselfly nymph (Gomphilidae), dragonfly nymph (Coenagrionidae), macro-dytiscids, micro-dytiscids (Dystiscidae), notonectids (Notonectidae), freshwater shrimps (Palaemonidae), tadpoles (Ranidae) and tilapia fish (Cichhdae). Artifical habitats were sampled and populations determined before and after application of the plant powder. Four doses (8.571, 5.714, 2.875 and 1.429 g L-1), were used in the trials and mortalities monitored after 24, 48 and 72 h. After 24 h, at 1.429 g L -1 of the powder from P. guineense and S. mauritiana, less than 20% mortality was obtained against gomphilids, coenagrionids, dytiscids, notonectids and palaemonids. At 48 h powder of P. guineense gave 8.8 and 45% mortality against micro-dytiscids and tadpoles at 8.571 g L-1, respectively. After 72 h at 2.847 g L-1, powder of S. mauritiana caused 6.9 and 35% mortality against micro-dytiscids and fish respectively. The LD50s (24 h) for the organisms varied from 12.2 to 39.2 g L-1 and 13.6 to 41.82 g L-1 for P. guineense and S. mauritiana, respectively. Both plant powders showed slight negative effects on non-target aquatic macro-invertebrates and vertebrates.

Original languageEnglish
Pages (from-to)86-93
Number of pages8
JournalInternational Journal of Zoological Research
Volume3
Issue number2
StatePublished - Dec 1 2007

Fingerprint

Spilanthes
Piper guineense
Piperaceae
Kenya
Asteraceae
powders
invertebrates
vertebrates
tadpoles
nymphs
Notonectidae
Ranidae
Coenagrionidae
larvicides
Palaemonidae
Zygoptera
Anisoptera (Odonata)
tilapia (common name)
fish
Culicidae

Keywords

  • Aquatic
  • Macro-invertebrates
  • Non-target
  • Powder
  • Vertebrates

ASJC Scopus subject areas

  • Animal Science and Zoology

Cite this

Susceptibility of non-target aquatic macro-invertebrates and vertebrates to Piper guineense (Piperaceae) and Spilanthes mauritiana (Asteraceae) powder in Kilifi District, Kenya. / Ohaga, Spala Oduor; Ndiege, I. O.; Kubasu, S. S.; Beier, John C; Mbogo, C. M.

In: International Journal of Zoological Research, Vol. 3, No. 2, 01.12.2007, p. 86-93.

Research output: Contribution to journalArticle

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abstract = "Powders of Piper guineense and Spilanthes mauritiana, potential mosquito larvicides, were assessed to determine their impact on non-target aquatic macro-invertebrates and vertebrates. Field tests were conducted in Kilifi District Kenya on field populations of damselfly nymph (Gomphilidae), dragonfly nymph (Coenagrionidae), macro-dytiscids, micro-dytiscids (Dystiscidae), notonectids (Notonectidae), freshwater shrimps (Palaemonidae), tadpoles (Ranidae) and tilapia fish (Cichhdae). Artifical habitats were sampled and populations determined before and after application of the plant powder. Four doses (8.571, 5.714, 2.875 and 1.429 g L-1), were used in the trials and mortalities monitored after 24, 48 and 72 h. After 24 h, at 1.429 g L -1 of the powder from P. guineense and S. mauritiana, less than 20{\%} mortality was obtained against gomphilids, coenagrionids, dytiscids, notonectids and palaemonids. At 48 h powder of P. guineense gave 8.8 and 45{\%} mortality against micro-dytiscids and tadpoles at 8.571 g L-1, respectively. After 72 h at 2.847 g L-1, powder of S. mauritiana caused 6.9 and 35{\%} mortality against micro-dytiscids and fish respectively. The LD50s (24 h) for the organisms varied from 12.2 to 39.2 g L-1 and 13.6 to 41.82 g L-1 for P. guineense and S. mauritiana, respectively. Both plant powders showed slight negative effects on non-target aquatic macro-invertebrates and vertebrates.",
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