The biology and fecundity of the citrus red mite Panonychus citri (McGregor) (Acari: Tetranychidae) at different temperatures under laboratory conditions

Authors : İsmail KASAP

Pages : 593-600

View : 9 | Download : 6

Publication Date : 2009-12-01

Article Type : Research Paper

Abstract :The developmental time and fecundity of Panonychus citri insert ignore into journalissuearticles values(McGregor 1916); insert ignore into journalissuearticles values(Acari: Tetranychidae); on Washington navel sweet orange insert ignore into journalissuearticles values(Citrus sinensis insert ignore into journalissuearticles values(L.); Osb.); leaves were determined at 15, 20, 25, 30 and 35 ± 1 °C, 65 ± 10% RH, and a 16:8-h insert ignore into journalissuearticles values(L:D); photoperiod under laboratory conditions. Total development time of P. citri females was 37.2, 16.6, 12.2, 9.8, and 9.0 days at 15, 20, 25, 30, and 35 ± 1 °C, respectively. Total and daily egg production levels of P. citri were highest at 25 °C insert ignore into journalissuearticles values(25.6 and 2.1 eggs);, followed by 20 °C insert ignore into journalissuearticles values(22.1 and 1.8 eggs); and 30 °C insert ignore into journalissuearticles values(16.6 and 1.7 eggs);. The lowest total and daily egg production levels were at 15 °C insert ignore into journalissuearticles values(16.5 and 0.8 eggs);. The development threshold for female eggs and egg to adult stages was 9.22 °C and 9.77 °C, respectively, while total effective temperature was 100 and 192.30 degree-days, respectively. The intrinsic rate of increase insert ignore into journalissuearticles values(rm); at 30, 25, 20, and 15 °C was 0.148, 0.160, 0.111, and 0.042 females female-1 day-1, respectively.
Keywords : Key words Citrus Red Mite, degree day, development, life table, Panonychus citri