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VOL. 9, ISSUE 9 (2024)
Studies on effect of Metarhizium (Nomuraea) rileyi (Farlow) against H. armigera (Hubner)
Authors
Momin A M, Salunkhe A J, Shinde P S, Mamlayya A B, Mane A B
Abstract
Metarhizium (Nomuraea)
rileyi is an effective entomopathogenic fungus having a specific host range
for many insect pests. Metarhizium (Nomuraea rileyi) (NR-DHA) strain of
entomopathogenic fungus was tested against the cotton bollworm, Helicoverpa
armigera (Hubner) larvae reared on artificial diet. Increased spore
concentration 2×103, 2×104, 2×105,
2×106, 2×107 and 2×108 were tested against
larvae of first instar to sixth instar. Mortality of larvae was increased as
increasing concentration of fungal spores. The
larvae became dead within one week after the treatment of N. rileyi. The
growth of fungus mycelium was observed on the outer surface of larval cadavers
on the fourth day. LC50 1.01×103(Ist instar), 5×104(IInd
instar), 2.9×105 (IIIrd instar), 1.97×106
(IVth instar), 2.5×107 (Vth instar), 8.2 ×108
(VIth instar) spores/ml was evaluated. Suppression of larval
populations was seen in the current studies.
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Pages:143-146
How to cite this article:
Momin A M, Salunkhe A J, Shinde P S, Mamlayya A B, Mane A B "Studies on effect of <i>Metarhizium</i> (<i>Nomuraea) rileyi</i> (Farlow) against <i>H. armigera</i> (Hubner)". International Journal of Entomology Research, Vol 9, Issue 9, 2024, Pages 143-146
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