Validation of degree-day models for predict!ng the emergence of two fruit flies (Diptera: lephritidae) in northeast Egypt  

作　　者：Mohamed HBayoumy J.P.Michaud Faten AABadr Nabil MGhanim 

机构地区：[1]Faculty of Agriculture,Economic Entomology Department,Mansoura University,Mansoura,Egypt [2]Department of Entomology,Kansas State University,Agricultural Research Center-Hays,Hays,Kansas,USA [3]Agricultural Research Center,Plant Protection Research Institute,Dokky,Giza,Egypt

出　　处：《Insect Science》2021年第1期153-164,共12页昆虫科学（英文版）

摘　　要：We estimated thermal developmental thresholds(7o)and degree-day(DD)constants for the immature stages of two tephritid pests,Bcictrocera zonata(Saunders)and Ceratitis capitata(Weidenmann).Males of both species were trapped in an Egyptian guava orchard during the fruiting seasons of 2016 and 2017 and trap catches were compared with peak flights predicted by the DD model based on local weather data.Ceratitis capitata had faster development than B.zonata at 20 and 25°C,but their overall developmental rate was similar at 30 and 35°C.The thermal threshold of development(7o)of B.zonata was higher than that of C.capitata,indicating greater sensitivity to cold.Although 35°C yielded the fastest development of both species,survival was higher at 30°C,with B.zonata experiencing a slight advantage,suggesting better tropical adaptation.Immature development of B.zonata and C.capitata was estimated to require 338 and 373 d,respectively,and 616 and 424 DD for a complete generation.Trap catches over both seasons showed good correspondence to peaks of fly activity predicted by the DD models;deviations from expectation ranged from 0 to 7 d for both fly species.Both species had four overlapping generations per season,with B.zonata abundance peaking in the first generation in both years,but only in 2016 for C.capitata.The models predict about eight and 12 generations per year in northeast Egypt for B.zonata and C.capitata,respectively.These models should be useful for timing pest control measures to coincide with periods of peak fly activity in fruit orchards.

关 键 词：Bactrocera zonata Ceratitis capitata development forecasting thermal threshold 

分 类 号：Q96[生物学—昆虫学]