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THE EFFECTS OF SEED
TREATMENTS WITH FUNGICIDES ON STEM ROT CAUSED BY SCLEROTIUM ROLFSII
SACC., IN PEANUT
DAVUT SONER AKGUL1,
HULYA OZGONEN2* AND ALI ERKILIC3
Abstract:
The effects and
the possibility of using some systemic fungicides as seed treatments
with different active ingredients against stem rot caused by
Sclerotium rolfsii in peanuts were investigated. The effects of
fungicides on mycelial growth of pathogen and seed germination of
peanuts In vitro were determined. Severity of disease and yield
were determined with pot experiments under controlled conditions as well
as field experiments which were conducted for two years. Fungicides
decreased the germination disorders caused by some fungal agents (Aspergillus
spp., Rhizopus sp., Penicillium spp.) in and/or on the
surface of seeds significantly and treatments provided an increase in
germination ratio of seeds by 64-96%. Seed treatments decreased the
disease severity in pot experiments under controlled conditions and
field experiments by 74.3% and 34.2%, respectively. Fungicides having
mixture of different active ingredients named tolclofos-methyl 200g/kg +
thiram, 200g/kg, carboxin 200g/L + thiram 200g/L, fludioxonil, 100g/L
and azoxystrobin 75g/L + fludioxonil 12.5g/L + metalaxyl-M 37.5g/L
decreased the disease severity of pathogen in all experiments
significantly and it was concluded that seed treatments with these
fungicides provided substantial contribution to control of disease.
1Manisa Viniculture Research Institute Manisa, Turkey
2Süleyman Demirel University, Agricultural Faculty, Department of Plant
Protection 32260 Isparta, Turkey
3
Çukurova University, Agricultural Faculty, Department of Plant Protection
01330 Adana, Turkey
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