The Population System And Integrated Quarantine And Management Of Melon Fly

With the method of system investigation, field management experiment and indoors feed experiment combine together, to investigate the indentfication, biology, ecology, integrated quarantine and management of melon fly.1. The identfication technology of melon flyThe adult and larva identfication key of majior quarantine fly having been found during Chinese exportand import quarantine were authorized, to satisfy the usage of melon fly 's celerity and authentic identification. The morphology character , the key points of identification and the integrated technology of melon fly's different stage were described.2. The biology speciality of melon flyThe emergence.feeding. copulation, oviposit and longevity of melon fly adult were particularity described. 7 generations per year in Sanming city, and the competition relationship among melon fly, oriental fruit fly and pumpin fruit fly were proved up.3. The population system of melon flyThe relationship of the population system among the others population system in melon garden ecosystem were proved up.By the indoors feeding experiment, the developmental durations and velocity were established. The threshold developmental temperature of melon fly egg, larva, pupa, preoviposition, and generation were 9.64 , 6.52, 8.13, 10.69, 10.39℃, respectively. The total effective temperature of melon fly egg, larva, pupa, preoviposition, and generation were 20.14 , 175.44, 232.56, 232.56 , 523.56 day-degree, respectively. The developmental durations forecast formula of melon flyegg, larva, pupa, preoviposition, and generation were N|= T_/o6f+1 q2\ 'M _ 175.44 + 9.65 N _ 23256 ±11.40 M _ 232.56 ± 11.81 M _ 523.56 ± 11.30W2 T-(6.52±1.26) ' "3 T-(8.13±1.35) ' * ^4 T-(lO.69±2.15) ' 5 T-(l0.39±2.10) 'respectively. The relationship model between developmental velocity and temperature of melon fly egg, larva, pupa, preoviposition, and generation were Y,=71.8103 + 1.9285T-0.0385T2, Y2=-324.5743 + 34.5201T--0.6953 T2, Y3= -368.5100 + 37.8012T-0.7612 T2, Y4=66.6363 + 1.2221 T-0.0213T2, Y5=-194.0366+18.8694T-0.3781 T2. respectively.By the indoors feeding experiment, the effect of humidity to developmental durations and survivor ratio of melon fly were much markedly different. The tropisms of melon to different color lights were much markedly different. The developmental duration of melon fly's egg under the different condition of illumination were much markedly different, but the developmental duration of melon fly's larva and pupa under the different condition of illumination were not markedly different. The oviposition selectivity to different color were much markedly different.At 30°C constant temperature, according to the test result, the generation developmental durations of melon fly reared on balsam pear- cucumbers sponge gourd were 44.82, 43.12 and 46.08d .respectively, and there were significantly ■ different between development durations of larvas pupa and generation , as well as the longevity of males on these three different host fruits. The fecundities of females that reared on balsam pears cucumbers sponge gourd were 878.41 s 895.65s 806.35eggs/$, respectively, significantly differento By the technology of life table, index of population trend (I) of melon fly laboratory population reared on balsam pears cucumbers sponge gourd were 228.39N 268.70s 201.59, respectively, net reproduction (Ro) were 9.2532s 94.0800s 48.9910, respectively, significantly differento The other parameter of life tables were no significantly differento Finite rate of increase all were over 1 showed that melon fly laboratory population reared on threes three host fruits all positively increased oBy the indoors feeding experiment, the soil depth of melon fly's pupation was 2~4 cm from the surface, the distribution probability of pupa in different soil depth were much markedly different. Among the rage of time of foundering, the pupa duration were much markedly different.