ORIGINAL ARTICLE
Efficacy of three entomopathogenic fungi alone or in combination with diatomaceous earth modifications for the control of three pyralid moths in stored grains
1
Pests and Plant Protection Department, National Research Centre
El- Behouth St., P.O. Box 12622, Dokki, Cairo, Egypt
2
Inorganic Chemistry Department, National Research Centre
El- Behouth St., P.O. Box 12622, Dokki, Cairo, Egypt
Corresponding author
Shadia El-Sayed Abd-El-Aziz
Pests and Plant Protection Department, National Research Centre El- Behouth St., P.O. Box 12622, Dokki, Cairo, Egypt
Pests and Plant Protection Department, National Research Centre El- Behouth St., P.O. Box 12622, Dokki, Cairo, Egypt
Journal of Plant Protection Research 2012;52(3):359-363
KEYWORDS
Plodia interpunctellaEphestia kuehniellaEphestia cautellaBeauveria bassianaMetarhizium anisopliaeIsaria fumosoroseaDiatomaceous earths
TOPICS
ABSTRACT
The efficacy of Natural diatomaceous (DE) alone and combined with three fungal pathogens:
Beauveria bassiana, Metarhizium
anisopliae
and
Isaria
fumosorosea
against three moth species,
Plodia interpunctella
,
Ephestia cautella
and
E. kuehniella
was evaluated. Modified
diatoms with Calcium hydroxide (Ca-DE) and modified diatoms with Sodium hydroxide (Na-DE) were the highlight treatments against
tested insects and achieved the highest mortality percentages.
E. kuehniella
achieved the highest tolerant to tested DEs.
B. bassiana
was
the most effective fungus alone against the three tested insects. Ca-DE and Na-DE treatments strongly enhanced the potency of the tested
fungi.
E. kuehniella
was more susceptible to
M. anisopliae
and
B. bassiana
. Larvae of
P. interpunctella
and
E. cautella
were more tolerant to
I.
fumosorosea
alone than
E. kuehniella
. In most cases, DE combinations with tested fungi had synergistic effects, while in
E. cautella
, modi-
fied diatoms with Aluminium hydroxide (Al-DE) decreased the efficacy of
M. anisopliae
and
I.
fumosorosea
. Also, Al-DE and DE impaired
the efficacy of
I.
fumosorosea
against
E. kuehniella
. The egg production was highly suppressed by combination of Ca-DE followed by Na-
DE with tested fungi in comparison to untreated control.
The combination of Ca-DE/
Beauveria bassiana
strongly suppressed the number
of deposited eggs of
P.
interpunctella
(54.6±5.8 eggs/female), in comparison to untreated control (288.3±3.4 eggs/female).
The most effective DEs modification were Ca-DE and Na-DE had insecticidal, repellent and ovicidal effects against tested insects and
they had synergistic effects on the potency of tested fungi.
CONFLICT OF INTEREST
The authors have declared that no conflict of interests exist.
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| ISSN: | 1427-4345 |
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