Palestra proferida no workshop “IRAC International Task Team Meeting”, realizado em Brasília, DF, no período de 3 a 5 de março de 2015.

1. Corn - summary
• Agreement
– Ensure growers are aware of thresholds for Refuge area and
reacting when GTED is observed in the Bt area;
– Q: what is the % survival that occurs when growers follow the
standard thresholds? A: need research
– Refuge size
• At least 10% - sprayed to control S. frugiperda (FAW) according to the threshold: at
least 20% Davis scale ≥3. Limit the number of insecticide sprays over the refuge
plants. Insecticide sprays should applied up to V4-V6 (regional input is needed)
• 5% unsprayed with seed treatment (it was later challenged by Dr. Celso Omoto
since there is not unsprayed option for Bt cotton and Bt soybean)
– Placement
• In field
– Strips are preferable over blocks (what’s the minimum
number of rows?) ; Block (800m); Perimeter (800m)

2. Corn - summary
• Agreement
– Implementation
• Who are the decision makers? They vary according to
the regions: consultants, technical managers, farmers
(large groups), dealers, Cooperatives, Industry sales
forces, etc.
• Important to engage stakeholders: ABRASEM will
engage ABRAMILHO
• Regional implementation: Foundations (e.g FAMASUL,
Fundacao MT, Fundacao Chapadao, etc), Cooperatives ,
etc.

3. • Agreement
– Insecticide spray over Bt corn
• Technologies with performance issues (FAW)
– spray when great than expected damage (GTED) is observed based
on monitoring;
• Technologies with no performance issues (FAW)
– Trait providers will establish their mitigation plan to react to GTED (e.g. if need
to spray refuge then scout the Bt field and if GTED is observed then spray
according to the mitigation plan established by the trait provider);
– Rotate MOA
• Refuge: 2 sprays up to V6. Different MoA than the MoA used in the seed treatment
Corn - summary