火力楠无性系种子园无根藤的防治应用

Prevention and Control of Cassytha filiformis in Clonal Seed Orchard of Phoebe Bournei

为探明不同浓度的灭草松和灭草松钠盐药剂对无根藤的防治应用及对火力楠叶片药害程度的影响,试验通过喷施0.5%和1.0%两种浓度的灭草松和灭草松钠盐药剂,对比4种处理下无根藤藤枯率和火力楠叶枯率。结果表明,两种浓度的灭草松和灭草松钠盐对防治无根藤均有成效,对火力楠叶片存在不同程度的药害影响,且4种处理下的无根藤藤枯率和火力楠叶枯率都具有显著性差异。使用1.0%浓度的灭草松钠盐防治效果最好,防治率为100%,且对火力楠叶片药害影响最小,为11.41%。通过研究筛选出防治无根藤的药剂和使用浓度,可以运用在火力楠种子园防治无根藤,施用一个月后即可达到较理想的防治效果。

In order to explore the application of different concentrations of bentazone and bentazone sodium salt solution in controlling Cassytha filiformis and the phytotoxicity on the leaves of Michelia macclurei,this experiment compared the withered rates of vines of C.filiformis and leaves of M.macclurei under four treatments(spraying a solution of 0.5%bentazone,0.5%bentazone sodium salt,1.0%bentazone,and 1.0%bentazone sodium salt).The results showed that all the solutions effectively controlled C.filiformis and were phytotoxic for leaves of M.macclurei to a certain extent.Meanwhile,there were significant differences between the withered rates under four treatments,in which 1.0%bentazone sodium salt solution was most effective for C.filiformis controlling(100%of withered vines)and least harmful for leaves of M.macclurei(11.41%of withered leaves).Based on this study,it was suggested that in M.macclurei seed orchards,an adequate control efficiency of C.filiformis could be reached by spraying 1.0%bentazone sodium salt solution for one month.