Effects of Temperature and Host Plant on Population Parameters of the Citrus Psyllid (Diaphorina citri Kuwayama)

Yun-Chung Fung, Chiou-Nan Chen
2006 Formosan Entomol   unpublished
109 (Rutaceae) 80 46 (Huanglongbing) (greening (Diaphorina citri Kuwayama) * (Rutaceae) (Murraya paniculata (L.) Jack) (Citrus reticulata Blanco) (Fortunella margarita (Lour.) Swingle) 16202428 32 o C (Diaphorina citri Kuwayama) 16 o C 56.659.9 56.7 28 o C 15.515.0 14.6 () 11.2512.75 13.00 o C (K) 250 28 o C 82.963.3 77.0% 16 o C 9.337.8 18.2% 16 o C 32 o C 28 o C 616.5523.5 795.5 (r) 28 o C 0.2540.221 0.182 () 28 o C 1.2891.247 1.196 ABSTRACT The development, survivorship, longevity,
more » ... ongevity, fecundity, and population parameters of the citrus psyllid, Diaphorina citri Kuwayama were studied at 16, 20, 24, 28, and 32 o C on three Rutaceae plants. The measured parameters listed below are for jasmine orange, Murraya paniculata (L.) Jack; ponkan, Citrus reticulata Blanco; and kumquat, Fortunella margarita (Lour.) Swingle, respectively. The average developmental period from egg to adult varied from 56.6, 59.9, and 56.7 days at 16 o C, to 15.5, 15.0, and 14.6 days at 28 o C. The low temperature developmental threshold from egg to adult was 11.25, 12.75, and 13.00 o C, and the cumulated effective temperature was 250 degree-days on all three plants. The survival rate also varied from 82.9, 63.3, and 77.0% at 28 o C, to 9.3, 37.8, and 18.2% at 16 o C. Adults reared at 16 o C on all three plants and at 32 o C on ponkan failed to survive and reproduce. The mean longevity of females decreased with increasing temperature. A female on average laid 616.5, 523.5, and 795.5 eggs at 28 o C. The cohorts reared at 28 o C had the highest intrinsic rate of increase (0.254, 0.221, and 0.182); finite rate of increase (1.289, 1.247, and 1.196); net reproductive rate (319.56, 265.27, and 380.68); and shortest population doubling time (2.7, 3.1, and 3.8days); and mean generation time (22.7, 25.3, and 32.7 days). Accordingly, we concluded that the optimal temperature range for D. citri population growth was 24-28 o C, and jasmine orange was the most suitable host plant among the three plants tested.
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