红地球葡萄篱架栽培技术

红地球，别名晚红、大红球、金球红、美国红提，原产地美国，果穗圆锥型，单穗重一般800～1200g，最大单穗重可达2500g，紧密度适中，果粒圆球形，单粒重13g左右，最大单粒重可达23g，可溶性固形物14％～15％，无裂果。萌芽至开花约50d（天），开花至成熟约109d，结果枝率中等，不稳定，生长势中等偏强，耐肥性中等，不抗白腐病，耐湿性较差，但耐储运性好。遂昌县自2004年引种1670m^2，采用双十字V型篱架栽培，至2006年种植面积已达10hm^2，经过几年种植摸索，取得了一年培育苗架，二年产量达1562kg／667m^2，三年后稳产1500kg／667m^2，产值达12000元／667m^2的高效成果。现将有关栽培技术总结如下。

浙南柳杉毛虫发生规律及防治技术

柳杉毛虫(Dendrolimus latipennis Walker)在浙南山区一年发生一代,以卵在柳杉针叶腋间越冬,其周期规律,短周期26年,长周期29年,暴发后可连续为害3～4年。早春低温可使幼虫大量死亡。对10年以下柳杉被害死亡率为19.2%,10～20年生被害死亡率为35.3%。在柳杉毛虫4～5龄幼虫期进行每亩1kg白僵菌或每亩3kg烟剂进行防治,效果良好。

杉木化学去雄初步研究

Chemical emasculation experiment were carried out in biclonal seed orchard of Chinese fir (Cunninghamia lanceolata) in Suichang County, Zhejiang Province from 1996 to 2000. The chemical emasculation with the compound of 45% paraquat and 10% glyphosate were commonly used at present. The results showed that: (1) Under the suitable prescriptions, the compound of 45% paraquat and 10% glyphosate is one of the inexpensive, easy and ideal chemicals of emasculation. (2) In this experiment, the suitable spraying time is 20 days before the male cone begin to dust. For the sake of safety, if the spraying begin after the formation and differentiation of male cone, but before its growth and development, i.e. before the flow of tree liquid (in dormancy), the effect will be better. (3) The optimal mixture ratio of 45% paraquat and 10% glyphosate is (8 g:15 mL)～(8 g:25 mL), diluting 80 times when using. It is better to spray 3 times.