Effect of hosts and temperature on biological parameters of Bactrocera dorsalis (Hendel) adult

Temperature exhibited a large effect on the development and reproduction of oriental fruit fly adlut. The pre-ovipositon period and period of male from emergence to mature of oriental fruit fly shortened as the increase of temperature gradually. Mathematic models described the relationship between development velocities and temperatures were set up on seven species of fruits for pre-oviposition period,mature period,longevity,and fecundity of oriental fruit fly.Temperature could obviously affect the period of female pre-oviposition but plant hosts had no influence on it. The period of female pre-oviposition shortened with temperatures and were 41. 1,29. 1,13. 8,12. 9 and 15. 6 days at temperatures of 15,20,25,30 and 35℃,respectively when fed on guava. The peviods for fully mature of male adult were 21. 4,15. 7,12. 8,11. 5 and 10. 8 days respectively at above five temperatures. The longevity of adults varied obviously with the temperature,and were from 140- 190 days at 15℃ to 34- 37 days at 35℃.Host plants had a larger effect on the fecundity. The fecundities of oriental fruit fly fed on mango,guava,banana( Musa nana Lour),loquat( Eriobotrya japonica( Thunb.) Lindl.),common carambola( Averrhoa carambola L.),Chinese date( Ziziphus mauritiana Lam.) and orange( Citrus sinensis L.)were 1634. 3,1520. 6,1309. 1,1019. 8,983. 3,966. 3 and 912. 9 eggs,respectively at temperature of25℃.The female adult began to lay eggs after fully matured and the oviposition peak was 2- 3 days after emergence. Relationship between the daily fecundity and the time after emergence of oriental fruit fly reared on orange,and guava were regressed as model Y( fecundity) =- 3. 524 + 0. 707T- 0. 00679T2and model Y( fecundity) =- 20. 104 + 1. 9827T- 0. 0203T2. These two equations exhibited a bias distribution. The postponement of host supply could significantly decrease the fecundity of oriental fruit fly. The fecundities per female fed on guava under 25℃ were 968. 5,736. 6,710. 5,658. 3,644. 1 and576. 3,respectively if the adult was provided with hosts at 0,5,10,15,20 and 25 days after emergence.