| The carmine spider mite, Tetranychus cinnabarinus Boisd is found to infest more than 120 host plants of economic value including crops, cotton, deciduous fruits, vegetables and ornamental plants and is widely distributed in different parts of the world. The mulberry morus alba L. is a favourable host of this serious mite. The development and population dynamics of the T.cinnabarinus on 3 mulberry varieties (fengchisang morus, husang morus, yu71-1 morus)were studied by methods of laboratory observation and population life table technique . The fecundity life tables of the laboratory population were constructed and analyzed using Jackknife techniques. And the resistance of three mulberry to carmine spider mite was assessed using the life table parameters. The results indicated that there were significant differences in the intrinsic rate of increase of the mite on different mulberry varieties, with that on yu71-1 morus higher, and that on fengchisang morus the lowest. There were also notable differences in the developmental duration, female adult longevity, egg and other examined parameters of the mite on different varieties in the laboratory. The population survival was analyzed by Weibull model, The population survival curve belongs to the type of Deevey I . The number of egg produced by mites on yu71-1 morus was the highest, followed by the mites on husang 32 morus, and the lowest was the mites on fengchisang morus. According to the life parameters of the experimental populations of the mite, Fengchisang morus was a resistant mulberry varieties to the mite, while yu71-1 morus was a susceptible one.
|
PDF Full Text Request