The Phytosanitary Alert and Information Network (RAIF) of the Junta de Andalucía has issued a report on the phytosanitary evolution of citrus cultivation in the community during December.
Last month, the maximum temperatures in the main provinces/citrus areas of Andalusia remained at around 17.4 °C, i.e. almost 9% more than the maximum temperatures between 2000 and 2019. The minimum temperatures were 22% higher than the minimum temperatures recorded between 2000 and 2019, as they stood around 7.1 ° C, according to the RAIF.
The report also highlighted that there was an average of 82 l/m² of rainfall in the province in December, a volume higher than the one recorded in November and 12% higher than the historical record.
Producers continued harvesting medium orange and mandarin varieties during December. In general, the report states, the evolution of the phenological state K 'veraison' has advanced and is advancing satisfactorily in this campaign. The late varieties ended the month in K 'veraison'.
There was basically no risk of fruit fly bites in December due to the drop in temperatures and the record rainfall, the Junta de Andalucía stated. Despite the cool minimum temperatures recorded, this dipteran continued to be active in December because of the exceptionally warm maximum temperatures there were. However, the producers caught less than 0.5 flies/ trap /day, and the bite index values recorded remained below 1%.
According to the RAIF, due to the mild average temperatures in December, the red spider was detected –although, with a low level of attack– in the coastal provinces of Cadiz, Huelva, and Malaga. Its presence was especially prominent in Cadiz, where it was detected in nearly 3.2% of the leaves.
RAIF also asked producers to pay attention to the presence of Eutetranychus spp. In December, its presence was detected in an average of 8% of the leaves in the province of Cadiz, which was followed by Huelva with 5.5%.
The report also details the importance of sampling for the cotonet disease in contact areas between fruits or between fruits and leaves. At this time nymphs and adults can still be detected on leaves and fruits.