Amid the drought, wheat and corn were hit by hard frosts

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in the middle drought which affects wheat and has already caused Rosario Stock Exchange (BCR) In addition to giving up 130,000 hectares of grain in the agricultural zone, another problem was added over the weekend: Very low temperatures or frosts, which found many crops in different regions in stages close to flowering. This is the time when cereal plants are sensitive to these phenomena and can delay their development and lose more crops. It had an impact in the case of corn as well.

“Typically, most wheat varieties are cold-resistant down to -4°C in grass condition, up to Z3.1 on the Zadox scale,” said consultant Nicolas Marin Moreno. Scale is a convention that describes successive stages of winter grain development.

In the current situation, the harvest in Córdoba is already at Z4.3-Z4.5 (ear at the height of the neck of the last leaf) and in Olavaria, Buenos Aires, at Z3.5-Z3.9. (The flag sheet is fully visible). They are sensitive to low temperatures. “Areas with record low temperatures are likely to experience canopy and stem losses,” Marin Moreno warned.

It is still difficult to predict the degree of crop damage in each region, but the expert warned “Frosts in dry weather are more damaging than those that occur in good moisture conditions, and therefore they determine that plants will take longer to recover.”

In this context, he warned that a lot of wheat from Route 7 to Labulay, planted with a model to reach 50 kw/ha, will yield 15-20 kw/ha if there is no rain in the next few days.

Juan Pablo Yoele, councilor among other regions in the area of ​​the department of Marcos Juárez, southeast of Córdoba, “another dry autumn and without recharge leaves very little space in the traditional dry winter of the nucleus. in the region”, however “In all cases, the wheat sower expected that at some point the situation would change. But precipitation did not appear and strong cold appeared.

“It has never rained for nearly a month since the beginning of spring, but what never left us was the cold. In the middle of an endless dry winter The frosts continue with us and the warnings of the ghosts of the past come true. The memory of 2018 was fresh with the October 2nd frost and not so fresh a memory of the November 15th, 2007 frost where we had to go out in many lots to reseed corn and make decisions about what was left of wheat. noted.

For Joel, much of the long-cycle wheat is found between spiked juice and juice, which is to be expected. “Further damage already suffered by recent episodes of late freezes.”

“Poor root development of the crop will make the chances of recovery from the loss due to low moisture in the profile almost nil,” he said.

“Today, much of grower expectations are not met, with negative margins resulting from the average budget yield range ranging from 300-500 kg/ha to 2,000 kg/ha,” he said.

Regarding the early corn planted in September, Yoele noted that “despite the unfavorable start, it still has another story to tell.”

“Although it is known that maize seeds must have good moisture and temperature for effective implantation, The emergencies of the year meant that many lots were planted with just the right amount of moisture and cold to avoid missing the first harvest date.” remembered.

And he clarified: “In the phase of the harvest in which it is still found, the spike is kept 2-3 cm below the ground, frost damages the aerial part of the plant, which does not seriously damage the corn. However, if drought and low temperature conditions continue, the crop will not find the resources to recover, which could seriously affect the condition of the plants, without taking into account the spatial and temporal variations that already affect these lots.”

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