第25卷 第1期 浙 江 林 业 科 技 Vol. 25 No.1 2 0 0 5 年 1 月 JOUR. OF ZHEJIANG FOR. SCI. 2. Liandu Shuanxi Forestry Station of Lishui, Lishui 323000, China; 3. Xiangonghu Pear Company of Yunhe, Yunhe 323600, China) Abstract: Experiment of effect of 2.5% Lambda-cyhalothrin emulsifiable concentrate, 2.5% Lambda-cyhalothrin and 0.5% Matrine before fruit bag casing on rust spot rate resulted that application of 2.5% Lambda-cyhalothrin emulsifiable concentrate had the highest rust spot rate, with 78.44%, while that of 2.5% Lambda-cyhalothrin had lower one, with 17%, and 91% insecticidal effect, that 0.5% Matrine had 15% rust spot rate, but 71.85% insecticidal effect. Suggestion was offered to apply 1 500-fold 2.5% Lambda-cyhalothrin before bag casing. Key words: Cuiguan Pear; rust spot rate; Lambda-cyhalothrin; chemical control （上接第 38 页） Analysis on Growth Characteristics of 27 Families of Introduced Pinus taeda in Linan SHEN Zhen-ming，PAN Wei-hua，MEI Ai-jun (Linan Forestry Station of Zhejiang, Linan 311300, China) Abstract: Observation and analysis on growth and stability of 27 families of 5 provenances of introduced Pinus taeda in 1997 in Linan, Zhejiang province, the result showed that the growth of provenance of MG and TX were better. From the view of family, the growth of MG8, TX3 and MG5 were better, their height increment were respectively 116.8%, 110.1% and 108.2% of the local P. taeda, and their increment of D.B.H. were 108.8%, 119.4% and 107.6% of the local ones. Key words: Pinus taeda; provenance; family; growth characterisitic （上接第 45 页） Study on Growth and Phosphorous Removal effect of Lythrum salicaria in Eutrophia Water LIU Hua1，YANG Xia2 (1. Zhejiang Gongshang University College of Art Design, Hangzhou 310035, China; 2.Hangzhou Agriculture Academy, Hangzhou 310024,China ) Abstract: Study on growth and phosphorous removal of Lythrum salicaria in different levels of TP of eutrophia water resulted that it grew well and good phosphorous removal effect in 0 0.4mgL 1. During the 30 days experimental period, the highest removal percentage of TP in eutrophia water（TP0.4 mgL 1） reached more than 98%, which was higher than the control（Eichhornia crassipes）. In the first 10 days, Lythrum salicaria had the characteristics of quick reduction of TP Within the range of TP concentrations （0.05 mg L 1 to 0.4 mg L1） ， the removal percentage to TP positively correlated to TP concentrations. Key words: Lythrum salicaria；eutrophia water;P removal