The Interprofessional Association of Lemon and Grapefruit (Ailimpo) analyzed the phytosanitary status of citrus fruits in the province of Malaga in its latest published report, corresponding to week 12 of 2021.
The association recommends observing new shoots, from the appearance of flower buds to the fall of styles, to detect the presence of the green bug (Closterotomus trivialis). This insect can cause damage to sprouts, the fall of flowers and freshly set fruits. However, it is necessary to ensure their presence before deciding to carry out your chemical control.
The province's citrus fruit crops are practically free of spider mites (Tetranychus urticae), according to the report. However, the report recommends keeping the plots free of weeds to avoid reservoirs and continue monitoring crops to detect possible foci and prevent their expansion.
Ailimpo reminded producers that there is an autochthonous auxiliary fauna that can exert control over the red spider, so it is advisable not to carry out unjustified treatments. In case of having to carry out any treatment, producers must take into account the phase in which the pest is to use the most suitable product.
The interprofessional also stated that the main method of control against the lemon moth (Prays citri) was using chemical treatments. However, they added, the floral elements with larvae or eggs must be quantified before carrying out a treatment, since newly emerging larvae are more sensitive. Likewise, it is necessary to look for the moment in which the flowers and freshly set fruits predominate with respect to the total floral elements.
In week 12, the average percentage of outbreaks with the presence of aphids (various species) rose to 5% in the control plots. These aphids hinder growth and lead to the subsequent appearance of black sooty molds. In addition, some species can transmit viral diseases, such as the Tristeza disease. Ailimpo recommends that producers that must carry out treatments make use of the correct dose of the product, alternate the active ingredients to avoid resistance, and choose the one that best controls the dominant species.
According to the report, 0.4 fruit flies (Ceratitis capitata) were caught per trap a day and there were no fruits affected. However, it is advisable to install pheromone traps in plots that haven't been harvested to detect their presence and to act if captures surpass the admitted threshold. The fruit of no commercial value in the harvested plots must be removed to avoid the reproduction of the pest, the interprofessional added.
Three percent of shoots are affected by the presence of whitefly (Aleurotrixus floccosus), 3% of fruits are affected by water mold (Phytophthora spp.), and the incidence of Paraleyrodes minei in leaves is 0.5 %.