• Title/Summary/Keyword: Trichogramma spp.

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In Vitro Rearing of parasitoids of Insect Pests in China

  • Li, Li-Ying
    • Korean journal of applied entomology
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    • v.31 no.3
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    • pp.241-246
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    • 1992
  • Since 1975, the studies on in vitro rearing Trichogramma spp., Anastatus japonicus Ashmead, Telenomus dendrolimusi Chu, Dibrachys cavus Walker, Habrobracon hebetor(Say), Bracon greeni Ashmead have been conducted successfully in China. The simulated “host-eggs" are made of polyethylene or polypropylene semispherical capsules, containing artificial diets, in which insectan pupal hemolymph is the main component. Manufacture of simulated “host larvae" are made of small rectangular parafilm of cotton-paper bags, containing artificial diets with insectan pupal hemolymph as the main component. Mass production of in vitro reared Trichogramma spp. and Anastatus japonicus and its utilization in the fields showed good effectiveness in controlling cotton bollworm, pine caterpillars, sugarcane borers and litchi stink bug.

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Preliminary Study on the Hymenopterous Parasites of Rice Stem Borers with Description of Two Previously Unrecorded Species form Korea (이화명충 기생봉에 관한 연구 -한국미기록 2종을 포함하여)

  • Chang Young Duck
    • Korean journal of applied entomology
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    • v.17 no.1 s.34
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    • pp.65-69
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    • 1978
  • An intensive survey of rice insect pests and their natural enemies with special references on parasites of rice stem-borers was made during the last 5 years(1973-77). The results were obtained as follows: 1. 15 species of hymenopterous parasites from the rice stem-borers were identified; Trichogrammatidae-2 spp, Scelionidae-1 sp, Braconidae-5 spp, Ichneumonidae-7spp. 2. The two Trichogrammatids species, Apanteles chilonis and Microgaster russata are first records from Korea. 3. Museum presence specimens of the 3 species: Trichogramma chilonis, Eriborus terebrans and Gombrus ruficoxatus, we previously identified in Korea, could not be located in this periods of study.

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Biological Characteristics and Mass Rearing System for Cadra cautella (Walker) as a Substitute Diet for Natural Enemies (천적의 대체먹이로서 줄알락명나방(Cadra cauteiia)의 생물적 특성과 대량사육)

  • 김정환;김용헌;고현관;한만위;이관석
    • Korean journal of applied entomology
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    • v.42 no.3
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    • pp.203-209
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    • 2003
  • Biological characteristics of the almond moth, Cadra cautella, of which eggs will be substitute diets for Orius spp. and Trichogramma spp., were investigated and a mass-rearing system for the moth was developed. At 25$^{\circ}C$, egg, larval, and pupal period was 4.2, 29.8 and 8.3 days, respectively, and adult longevity was 5.8 days for female and 4.8 days for male. Total number of eggs at 20, 25 and 30$^{\circ}C$ was 128.9,207.9 and 139.9, respectively. The moth could be successfully reared with all food substrates tested, of which rice bran (50%)+chick feed (50%) assumed to be proper for massrearing in view of cost. Eggs could be stocked at 9 C for 7 days, representing 82% hatchability. In the rearing cage (16${\times}$24${\times}$9cm) used, 1,000 eggs was better for initial level of inoculation, showing relatively high emergence rate and adult weight. Mass-rearing procedures were explained in detail.

Studies on the Seasonal Occurences of the Tobacco Budworm, Heliothis assulta H. (Lepidoptera: Noctuidae), and the Parasitism Ratio of Trichogramma spp. on the Eggs. (담배나방의 각태별 발생소장과 난기생봉의 기생율에 관한 조사)

  • Choi K. M.;Cho E. H.;So J. S.;Hwang C. Y.
    • Korean journal of applied entomology
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    • v.14 no.3 s.24
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    • pp.137-140
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    • 1975
  • Field experiments on red-pepper were conducted in Suweon area during 1972-1974 to determine the seasonal fluctuation of Heliothis assulta H. using black light traps and direct counts. Adult moths emerged in late May, and showed three peaks of fluctuation from late June to middle July, from middle August to late August, and in mid-September. Eggs were first discovered in the field in early July, with peak incidence Iron late August to early September. Larval peaks occurred in late July to early August, in late August and mid-September to mid-October Initial hatching in the field occurred in early July. The numbers of the first larval generation were the highest. The parasitization ratio of Trichogramma spp. on eggs averaged 51 percent during mid-July to mid-September. The numbers of Trichogramma spp. emerging from one tobacco bud-worm egg ranged from one to four, but in most cases one or two egg parasitizing wasps emerged.

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