The leafhopper pest, which transmits the bacteria Spiroplasma and causes the disease known as ‘maize stunting’, is spreading across much of Argentina. The latest report from the National Monitoring Network of Dalbulus maidis indicates an anticipated general rise in leafhopper populations, which aligns with the seasonality and the presence of late maize crops. Despite this rise, experts are optimistic about the situation as the infectivity of the pest appears to be lower than in previous years.

According to the network's findings, while the majority of maize crops have already passed at least half of their susceptibility period to Spiroplasma, tests conducted in the northeastern and central northern regions of Argentina returned negative results for infectivity. This is a significant relief for farmers who worry about the impact of the leafhopper on their yields. The data suggests that the pest's impact may not be as severe this season, presenting a chance for agricultural initiatives to adapt and mitigate risks effectively.

However, it is important to note that in endemic areas, many crops are still in their vegetative stages. The coexistence of early and late maize varieties in the central northern regions raises concerns about the potential for early colonization and subsequent disease impact. Farmers and agricultural authorities must remain vigilant and prepared for any fluctuations in pest populations as the growing season progresses, to safeguard the maize production that is vital to the country’s food security and economy.