2835

2788

كارشناسي ارشد

حشره شناسي

اصفهان: دانشگاه صنعتي اصفهان، دانشكده كشاورزي

1383

چهارده، 122، [II]ص. : مصور، جدول، شكل، نمودار

حسين سيدالاسلامي

رحيم عبادي، بيژن حاتمي

4/5/1384

جهانگير خواجه علي، بهرام باني نسب

1396/02/31

كتابنامه

كشاورزي

مهندسي كشاورزي

ID2788

به فارسي و انگليسي: قابل رويت در نسخه ديجيتالي

Abstract Lepidosaphespistaciae Arch Hom Diaspididae is an important pest of pistachio insprayed orchards in Iran The parasitoids Coccobius testaceus Masi endoparasitoid Aphytis sp ectoparasitoid and Zaomma lambinus Walker hyperparasitoid had beenreported on L pistaciae in Isfahan but no information was available on biology andimportance of these species on pistachio The purpose of this study was to determinegeographical distribution of these species in Isfahan province phenology of thesespeciesto it s host and their relative importance To determine geographical distributionof those species and presence of other parasitoid species sampling was conducted in 5locations of pistachio production areas in Isfahan Also some morphologicalcharacteristic of those species were studied to differentiate between their developmentalstages Studies on phenology ofparasitoids with emphasis on C testaceus to their hostwas conducted in one orchard in 2003 and in two orchards in 2004 Sampling was in weekly intervals Samples were taken on defined surfaces of branches and leaves and in some cases on one hundred fruits or one hundred scales to evaluate seasonal population changes Sticky traps were used to monitor adult wasps Also sticky bands were used to monitor crawler s of host scale In three locations of five locations presence of three species that previously were reported was verified Also a new hyperparasitoid species Alberus sp was collected C testaceuswas overwintering as early stage larva within the host scale Those larvae start to develop in late winter sooner than oviposition of host Adult wasps emerged in early spring and another period of development of parasitoid was completed on ovipositing host In late spring emerged adults parasitised hosts on leaves fruits and branches and showed three fairly separate courses of development and activity through November Male individuals of C testaceus over wintered in mature larval stage Male larva feeds as ecto hyperparasitoid on mature larval and pupal stages of its own species or other parasitoids of L pistaciae It seems that Aphytis sp also show similar pattern of development and activity but further studies is recommended Z lambinus feeds as endo hyperparasitoid on mature larval stage of endo parasitoid and ecto parasitoid and rarely on pupal stage of endo parasitoid Alberus sp feeds as ecto hyperparasitoid on mature larval and pupal stages of endo parasitoid Percentage of parasitism by the C testaceus on end of overwintering generation of the host was about 35 to 50 and for summer generation on leaf about 60 on fruit about 90 and on growing branches about 70 Percentage of parasitism by the ecto parasitoid for summer generation of host on leaves was 60 Percentageof hyperparasitism on C testaceus on overwintering generation of host was 15 and on summer generation of host was 15 to 30 C testaceus with 5 periods of separable developmental stages probably 5 generations on two generations of host per year suitable synchronization to it s host and high parasitism in the low densities of host could be an important factor for natural control of it s host Presence of two hyperparasitoid and autoparasitism by C testaceusand also interaction between endo parasitoid and ecto parasitoid and a predator Cybocephalus fodori minor that feeds parasitized and non parasitized scales probably are negative factors in this host parasitoid system for control of L pistaciae in high populations elf U i l Lf AIJ I J I

حسين سيدالاسلامي

رحيم عبادي، بيژن حاتمي

جهانگير خواجه علي، بهرام باني نسب