Population fluctuation of agriculturally important species of the genus <em>Anastrepha</em> in three citrus varieties in Tamaulipas

In Tamaulipas, citrus production faces a phytosanitary risk due to the presence of Anastrepha ludens (Loew,1873), Anastrepha obliqua (Macquart, 1835), Anastrepha serpentina (Wiedemann, 1830), and Anastrepha striata (Schiner, 1868), since the females of these species oviposit inside the fruit, and the larval instars feed on them. However, the population fluctuation of these four species in the citrus-growing region of Tamaulipas remains unknown. The objective of this study was to determine the population fluctuation of A. ludens, A. obliquas, A. serpentina, and A. striata in Early orange (Citrus sinensis var. Navelina), Valencia orange (Citrus sinensis L. Osbeck) and Red grapefruit (Citrus paradisi Macfad var. Red Blush) cultivars in the municipalities of Güémez, Llera de Canales, Padilla and Victoria, Tamaulipas. To accomplish this, Multilure traps baited with hydrolyzed protein were deployed for 52 weeks, and the number of captured adults was recorded to calculate the FTD (Flies/Trap/Day) index. The data were then analyzed using analysis of variance and the Kruskal-Wallis test to assess differences among crops. The results showed that the average capture rates of A. ludens, A. serpentina and A. striata were similar in three citrus varieties, while the abundance of A. obliquas was significantly different in Valencia orange crop. Additionally, A. obliquas, A. serpentina and A. striata were recorded from January to August, whereas A. ludens was present from January to December, with peak abundance in March, May and October.