Management of Stem Gall Disease of Coriander caused by Protomyces macrosporus Unger
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Date
2022
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Journal ISSN
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Publisher
DRPCAU, PUSA
Abstract
Coriander is one of the first spices to be used by mankind dates back to
5000BC. It is called as ‘Miraculous herb’ as all parts of the plant including seeds and
leaves are used both as spice as well as herbal medicine. Among various diseases
attacking coriander, stem gall disease caused by Protomyces macrosporusUnger is the
most devastating disease resulting 16-50 per cent yield loss.Considering the
seriousness of this disease, present investigation was carried out on various aspects
viz., survey, germplasm screening and integrated disease management at T.C.A.,
Dholi campus of Dr. Rajendra Prasad Central Agricultural University, Pusa, Bihar
during 2021-22. Survey conducted in two districts of Bihar i.e., Muzaffarpur and
Samastipur revealed maximum and minimum mean disease incidence of 49.86 and
18.42 per cent in Muzaffarpur and Samastipur district respectively. Out of twenty
coriander germplasm screened against the stem gall disease, only one germplasm
(RD-23) found moderately resistant. Under disease management, minimum PDI of
20.17 along with maximum yield of 1713.89 Kg/ha over control was recorded in
treatment involving seed treatment @10g/Kg seed & soil application @5g/ 3m2 of
Trichoderma asperellum + foliar spray with a ready formulation containing
Azoxystrobin 18.2%+ Difenoconazole 11.4% SC @0.1% at 45, 60 & 75 DAS.
However, highest ICBR of 1:2.50 was realized in seed treatment with a fungicidal
formulation containing Carboxin 37.5% + Thiram 37.5% WS @4g/Kg seed followed
by foliar spray with a ready formulation containing Azoxystrobin 7.1%+
Propiconazole 11.9% SC @0.1% at 45, 60 & 75 DAS.