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首页> 外文会议>64th Annual Convention of the Sugar Technologists' Association of India Aug 17-19, 2002 Cochin (Kerala) >NATURALLY OCCURRING KEY MORTALITY FACTORS OF TOP BORER (SCIRPOPHAGA EXCERPTALIS WLK.) IN SUGARCANE RATOON IN U.P
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NATURALLY OCCURRING KEY MORTALITY FACTORS OF TOP BORER (SCIRPOPHAGA EXCERPTALIS WLK.) IN SUGARCANE RATOON IN U.P

机译：U.P.甘蔗RA中最主要虫（雄性短尾SC）的自然死亡关键因素

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The studies were undertaken to assess the impact of naturally occurring bio-agents, which govern the population dynamics of top borer in sugarcane ratoon agro-eco-system. the observations were recorded for two cropping seasons during 1997-98 and 1998-99 in sugarcane ratoon in field conditions at research farm of U.P. Council of Sugarcane Research, Shahjahanpur. The maximum incidence of top borer was 31.6 percent and 44.5 percent during June in 1997 and 1998 respectively, when the temperature was 38.1 and 40.1℃, Rh 57 and 55 percent and rainfall 60.4 and 27.2 mm, while minimum incidence was 3.5 and 4.1 percent during February in both the years. The prepupal stage was observed during January and February in ratoon. The natural enemies attacking egg masses were Telonomus spp. 4.5 percent and Trichogramma spp. 4.8 percent. The key mortality factors caused the death of eggs to the extent of 9.86 percent. The parasitization due to Rhaconotus scirpophage was 12.3 percent, Stenobracon deesae cam. 6.99 percent, Melcha ornatipennis Cam. 1.3 percent and Elasmus zehntneri Ferriere 2.1 percent during this period ranged from 18.0℃ to 33.0℃ and Rh 77 to 78 percent. It was further observed that the naturally occurring parasitoids do play a significant role in suppressing the population density of top borer. It is therefore, advocated that the naturally occurring bio-agents may be conserved in situ and augmented for further exploitation in I.P.M. techniques for the control of top borer (Scirpophaga excerptalis Wlk.)
机译：进行了研究以评估天然存在的生物因子的影响，这些因子控制着甘蔗再生农业生态系统中顶级bore虫的种群动态。在美国研究农场的田间条件下，在甘蔗再生区的1997-98年和1998-99年记录了两个种植季节的观测结果。 Shahjahanpur，甘蔗研究理事会。 1997年和1998年6月，最高bore虫的最高发病率分别为31.6％和44.5％，其中温度为38.1和40.1℃，Rh 57和55％，降雨为60.4和27.2 mm，而最低发病率在1997年期间为3.5和4.1％。两年都是二月。一月和二月在再生区观察到了产前期。攻击卵块的天敌是Telonomus spp。 4.5％和赤眼蜂属。 4.8％。关键的死亡因素导致卵的死亡达到9.86％。 Stenobracon deesae cam引起的Rhaconotus噬菌体的寄生虫率为12.3％。百分之6.99，Melcha ornatipennis Cam。在此期间，温度从18.0℃到33.0℃，Rh 77到78％，分别为1.3％和elasmus zehntneri Ferriere 2.1％。进一步观察到，天然寄生的寄生虫在抑制顶bore的种群密度方面确实起着重要的作用。因此，提倡天然存在的生物制剂可以原位保存并增加以进一步在I.P.M. bore虫控制技术（Scirpophaga excerptalis Wlk。）

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