Amid low rainfall in São Paulo State since the end of the Summer (in late March), farmers have been concerned about the effects of the current lack of moisture on orange trees. According to Inmet (Brazilian Institute of Meteorology), it has not rained in SP for 50 days, the longest drought since 2012. To make things worse, last month was the hottest July in SP in all times.

For the oranges still on tree (from the 2022/23 season), although major damages have not been reported, the drought is concerning. In dry-land groves, some fruits wilted, reducing both quality and size for the in natura market, making them only suitable to the industry. Besides, some oranges and leaves fell off due to high water stress.

Also, the effects of greening on oranges have increased this year in many Brazilian areas. It is important to consider that, according to Fundecitrus, last year, greening affected 22.37 % of the orange trees in SP, the highest average.

On the other hand, the lack of rains is necessary to cause groves some water stress, which is crucial for blooming. According to Cepea collaborators, in northern SP, where groves are irrigated, many farmers began irrigating the plants in mid-June, and trees are now beginning to bloom. In these areas, conditions have been favourable so far. In dry-land groves, blooming is expected to occur as soon as it rains in the citrus belt.

BRAZILIAN MARKET IN JULY – The demand for citrus increased in Brazil in July, favoured by the atypical warm weather during the month. On the other hand, although the orange harvesting was in full swing in SP last month, industries’ purchases were high, which pushed up quotations.

In early September, orange trees bloomed in some orchards in São Paulo State (SP). These flowers will become the fruits from the 2022/23 season. Cepea collaborators reported higher blooming in irrigated orchards, majorly in northern and northwestern SP.

However, citrus farmers have been concerned about the effects of the weather on flower settlement. In dryland orchards, which count exclusively on rainfall for moisture, precipitation has been insufficient to trigger blooming.

According to Somar Meteorologia (weather forecast agency), rainfall was low in the major citrus-producing regions in SP in the first half of September. Thus, while it does not rain significantly, farmers are investing in plant nutrition in order to help on fruit set.

During fruit set (after blooming), temperatures and soil and air moisture deeply influence production. However, in the last years, high temperatures and rainfall below the average were common, limiting the output, largely in non-irrigated orchards.

Climatempo (weather forecast agency) forecasts rains for the second fortnight of September, and rainfall is expected to be within the average in the month in most citrus-producing regions in Brazil, except in southern SP. On the other hand, according to NOAA (National Oceanic and Atmospheric Administration), there is a 70 % chance that La Niña phenomena may return to Brazil until the end of 2021.

In Brazil, La Niña increases rainfall in the northeastern region and delays precipitation in the south. In southeastern BR, the scenario becomes similar to that in the southern area of the country, which concerns agents, in light of the current drought. For citrus farming, this delay may cause more damages to the 2022/23 harvest, since the coming months are critical for the development of trees, when higher moisture is needed.

BRAZILIAN MARKET IN SEPTEMBER – The demand for oranges increased in the in natura market in the first fortnight of September, favored by high temperatures and the payment of workers’ wages early in the month. As regards supply, the hot and dry weather in SP continued to limit the availability of high-quality fruits in the market (most of them are wilted and small-sized). In this scenario, prices increased.

The intense cold observed in São Paulo State (SP) in late July hit the orchards located in the citrus belt, with frosts registered in some areas. This scenario increased agents’ concerns about both orange production in the current season and the vitality of trees in the coming season – it is worth to mention that agents were already worried about these factors because of the lack of rains this year.

These agents are concerned about the vitality of the trees in all the groves hit by the recent frosts, since they are nearing the period of flower induction already debilitated by the lower rainfall in the last two years. However, it is worth to mention that it is still early to assess the damages caused by the bad weather, majorly the effects on the volume to be harvested next season.

Considering the current season (2021/22), the quality of the oranges on tree is expected to decrease, since some of the fruits affected by the frosts in late June/early July are dry and crystalised in the inside – these are undesired traits for both the in natura and the industrial segments, since the oranges have almost no juice in that condition. Besides, fruits dropped down in the areas that were already debilitated by the drought.

As regards next season (2022/23), the younger trees (which are currently sprouting) are expected to be the most damaged by the frosts. In the irrigated groves where flowering was anticipated, the effects of the bad weather are a concern too, since flowers may have been burned, as well as small fruits. It is worth to highlight that the recent frosts were not homogeneous, and it is still impossible to affirm that the volume to be produced in 2022/23 will be affected.

PONKAN TANGERINE – Although ponkan tangerine is more sensitive to temperature swings, the volume to be harvested in SP is not forecast to be affected, since the harvesting is practically over. On the other hand, in Minas Gerais, the volume to be harvested is higher, and there may be negative effects on the quality of the fruits.

TAHITI LIME – For this variety, although damages have not been assessed yet, concerns are higher, since tahiti lime is very sensitive to weather changes. Besides, differently from oranges, whose groves are mostly in the ripening stage or being harvested, development is at different stages among the regions with tahiti lime, with some of them in the flowering stage. According to Cepea collaborators, the intense cold caused the drop of some small fruitlets, flower buds and flowers.