Assessment of Trichogramma japonicum and T-chilonis as Potential Biological Control Agents of Yellow Stem Borer in Rice
文献类型： 外文期刊
作者：
Tang, Rui
1
;
Babendreier, Dirk
1
;
Zhang, Feng
1
;
Kang, Min
3
;
Song, Kai
4
;
Hou, Mao-Lin
5
;
作者机构： 1.Chinese Acad Agr Sci, Inst Plant Protect, MoA CABI Joint Lab Biosafety, 2 West Yuan Ming Yuan Rd, Beijing 100193, Peoples R China
2.CABI Europe Switzerland, Rue Grillons 1, CH-2800 Delemont, Switzerland
3.Dehong Prefecture Agr Bur, Plant Protect & Quarantine Stn, Dehong 678400, Peoples R China
4.Hebei Acad Agr & Forestry Sci, Dryland Farming Inst, Hengshui 053000, Peoples R China
5.Chinese Acad Agr Sci, Inst Plant Protect, State Key Lab Biol Plant Dis & Insect Pests, Beijing 100193, Peoples R China
期刊名称：INSECTS （ 影响因子：2.769； 五年影响因子：3.046 ）
ISSN： 2075-4450
年卷期： 2017 年 8 卷 1 期
页码：
收录情况： SCI
摘要： Two species of Trichogramma wasps were assessed for their effectiveness against yellow stem borer Scirpophaga incertulas. A laboratory cage test with T. japonicum and T. chilonis showed that both species parasitized yellow stem borer egg masses at 60.0% +/- 9.13% and 40.7% +/- 7.11%, respectively, with egg parasitism rates of 15.8% +/- 22.2% for T. japonicum and 2.8% +/- 5.0% for T. chilonis. Once the host eggs were parasitized, emergence rates were high for both species (95.7% +/- 0.12% for T. japonicum and 100% for T. chilonis). In paddy field trials, the two Trichogramma species were released at three densities (50,000/ha, 100,000/ha and 200,000/ha) in Southwestern China. Egg mass parasitism was 9% +/- 7.7% for T. japonicum and 15% +/- 14.1% for T. chilonis, and again only a relatively small fraction of eggs was successfully parasitized. No clear conclusion could be drawn on the most efficient release rate as no significant differences were found among the three release rates. A comparison of field-collected T. japonicum with T. japonicum and T. chilonis mass reared on Corcyra cephalonica showed significantly larger body size and ovipositor length in field-collected wasps, suggesting potentially higher effectiveness on yellow stem borer eggs after at least one generation on the target host. Factors contributing to the low field parasitism rates are discussed.
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