论文部分内容阅读
本文报道了枣尺蠖（ Ｃｈｉｈｕｏ ｚａｏ Ｙａｎｇ） 核多角体病毒（ＣｚＮＰＶ） 活性的生物测定结果及在山西太谷枣树林间防治枣尺蠖的试验效果。以不同浓度该病毒悬液浸渍鲜枣树叶，饲喂感染３ 龄初枣尺蠖幼虫，病毒浓度对数值与死亡机率的回归直线方程为＾ｙ ＝ ０ ．２３１ ＋ ０ ．８５９ ｘ ；ＬＣ５０ 及９５ ％ 的置信限分别为３－６５ ×１０５ 及４－０４ ×１０４ ～３－１３ ×１０６ＰＩＢｓ／ｍ Ｌ。以２－５ ×１０５ 、１－２５ ×１０６ 、２－５ ×１０６ 、１－２５ ×１０７ 和２－５ ×１０７ＰＩＢｓ／ｍ Ｌ５ 种浓度病毒感染３ 龄初幼虫，其ＬＴ５０ 值分别为１０－０１ 、９－５７、９－０８ 、７－９４ 和７－４９ ｄ 。同一浓度病毒（２－５ ×１０６ ＰＩＢｓ／ｍＬ） 对不同虫龄感染力不同。幼虫死亡率随虫龄增大而降低，从２ 龄的９６－７ ％ 降低到４ 龄的３０－０ ％ ；ＬＴ５０ 值随着虫龄增大而增大，从２ 龄的５－９７ ｄ 增加到４ 龄的１２－５７ ｄ 。在山西太谷枣林枣尺蠖幼虫２ 龄、３ 龄占８５ ％ 时喷洒浓度为２－５ ×１０７ＰＩＢｓ／ ｍＬ 的病毒悬液，虫口减退率高，成本较低，可在生产上推广应用
In this paper, the bioassay results of Chihuo zao Yang nuclear polyhedrosis virus (CzNPV) activity and the control effect of Zizyphus jujuba cv. Ziziphus jujuba in Shanxi Taigu jujube forest were reported. With different concentrations of the virus suspension impregnated fresh jujube leaves, feeding 3-year-old juvenile Scirpus juvenile larvae, the logarithm of the virus concentration and the probability of death regression linear equation ^ y = 0. 231 + 0. 859 x; LC50 and 95% confidence limits were 3-65 × 105 and 4-04 × 104 ~ 3-13 × 106PIBs / m L. The larvae of 3rd instar larvae were infected with 5 concentrations of 2-5x105, 1-25x106, 2-5x106, 1-25x107 and 2-5x107 PIBs / mL of virus with LT50 values of 10-01 , 9-57, 9-08, 7-94 and 7-49 d. The same concentration of virus (2-5 × 106 PIBs / mL) had different infectivity to different insects. Larval mortality decreased with increasing age from 96-7% at 2 years to 30-0% at 4 years. The LT50 increased with the increase of worm age from 5-97 days of age 2 To the 4th age of 12-57 d. In the Taigu jujube jujube, Shanxi jujube larvae 2 years old, 85% of age 3 sprayed with a concentration of 2-5 × 107PIBs / mL of the virus suspension, high population decline rate, lower cost, can be applied in the production of