, Volume 19, Issue 1, pp 9–21 | Cite as

Screening for highly effective isolates ofBacillus thuringiensis againstSpodoptera exempta andSpodoptera littoralis

  • M. Hamal
  • M. Brownbridge
  • M. Broza
  • B. Sneh


Several new isolates ofBacillus thuringiensis Berliner have shown significantly higher levels of insecticidal activity than the previous best isolates (Bt24-entomocidus and IH-A-aizawai) against bothSpodoptera littoralis Boisd. andSpodoptera exempta Walker. The best ones, in the following descending order of potency, were: againstS. littoralis — K26–21, MF4B–2, MR1–37, K28–30, K26–8; againstS. exempta — Bt-3, K30–3, HD-133, MR1–37, Bt-17, K26–8, K26–21, MF4B-2, HD-593. Larvae ofS. exempta were considerably more susceptible (4.12–1.25 fold) to some of the isolates (Bt-3, K30–3, HD-133, MR1–37, Bt-17, K26–8, HD-593) thanS. littoralis.

Key Words

Spodoptera littoralis Spodoptera exempta Bacillus thuringiensis biological control 


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Copyright information

© Springer Science + Business Media B.V. 1991

Authors and Affiliations

  • M. Hamal
    • 1
  • M. Brownbridge
    • 2
  • M. Broza
    • 3
  • B. Sneh
    • 1
  1. 1.Dept. of Botany and Institute for Nature Conservation Research, The George S. Wise Faculty of Life SciencesTel-Aviv UniversityTel AvivIsrael
  2. 2.The International Centre of Insect Physiology and Ecology (ICIPEMbita, South NyanzaKenya
  3. 3.Dept. of Biology, OranimHaifa UniversityQiryat TivonIsrael

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