Integrated disease management in barley (Hordeum vulgare L.) and evaluation
of fungicides for the control of Ramularia collo-cygni
1INTA Manfredi, 2 Fitopatología, FAUBA. firstname.lastname@example.org
It is possible to implement MIE
strategies to reduce the occurrence
of diseases thus reducing the
number of fungicide applications
per season in barley crop. It will be
important to continue and expand
this type of studies to provide
information for sustainable
Materials and Methods
Integrated disease management (IDM) proposes
strategies such as cultural measures, genetic resistance
and chemical control among others. Barley varieties in
Argentina are all susceptible to Ramularia Leaf Spot
(RLS, Ramularia collo-cygni).
-No presence of D. teres f sp
teres in the seeds analysed was
-RLS was the only disease
-The CE of the proposed
treatments was high and varied
between 70-100% achieving 1 t/
ha (average) more than the SF
control (3700 kg/ha, P<0.05)
Erreguerena IA1., Carmona MA2.
The objective was to evaluate the control efficiency
(CE) of fungicides registered for RLS in a context of
IDM of other diseases affecting the crop.
Trial in microplots (10 m2) with four replicates (DBCA) in
the EEA Balcarce with several IDM strategies:
1- Andreia variety, intermediate behavior to net spot
blotch (Drechslera teres f sp teres) Resistance.
2- Late sowing date (22/07) avoiding low temperatures
that favor scald (Rhynchosporium commune)
3- Seed health - Blotter test x freezing Exclusion.
4- Field without inoculum source (debris) Evasion.
5- Chemical control of RLS: six treatments with
fungicides applied in flag leaf stage and control without
fungicide (SF) (Table 1) Protection/Therapy.
Treatments Active ingredients Dose (cc/ha)
1 prothioconazole + trifloxistrobin 700
2prothioconazol + trifloxistrobin +
3fluxapyroxad + epoxyconazol +
4 isopyrazam + azoxistrobin 500
5clorotalonil + (prothioconazol +
trifloxistrobin) 1500 + 700
6chlorothalonil + (fluxapyroxad +
epoxiconazole + piraclostrobin) 1500 + 1200
7 no fungicide 0
Figura 1. RLS control efficiency (Abbot,1925) and yield).
Table 1. Description of chemical
120 Yield Control Eff iciency
Yield (t /ha )
Contr ol effic ien cy (%)