芹菜不同种植方式对3种蔬菜田烟粉虱的控制作用

通过在黄瓜、辣椒、番茄3种蔬菜田四周和行间间作芹菜(品种‘中华药芹’),研究芹菜不同种植方式和不同间作密度对3种蔬菜上烟粉虱的控制作用。结果表明,辣椒田以8∶1(每8行辣椒间作1行芹菜)、5∶1、3∶1的比例间作芹菜,烟粉虱虫口减退率最高分别可达62.45%、73.33%、86.67%,周植(在蔬菜种植小区四周"围栏状"种植1行芹菜,株距10cm)虫口减退率与芹菜间作5∶1相当;黄瓜田以1∶1和3∶1密度间作芹菜,烟粉虱虫口减退率最高分别可达77.14%、42.86%、5∶1间作时与对照差异不显著,周植芹菜仅在黄瓜生育前中期对烟粉虱有一定控制效果,在黄瓜生育后期无明显的控制效果;番茄田以3∶1与5∶1间作芹菜,烟粉虱虫口减退率最高分别可达90.12%、75.49%、8∶1间作时与对照差异不显著,周植芹菜仅在番茄生育前期对烟粉虱有一定控制效果,在番茄生育中后期无明显的控制效果。

Control effects of different planting ways of celery on Bemisia tabaci on three vegetable species

By intercropping and peripherally planting celery with cucumber,pepper,and tomato,the control effects of different planting methods on Bemisia tabaci in cucumber,pepper and tomato fields were studied.The results showed that the decrease rate of whitefly population reached 62.45％,73.33％ and 86.67％,respectively,when the intercropping proportions (pepper:celery) were 8∶1,5∶ 1,and 3 ∶ 1,and peripheral planting celery had similar control effect with the intercropping the at ratio of 5∶ 1 (pepper:celery).When the intercropping ratios (cucumber∶ celery) were 1∶1 and 3∶ 1 in the cucumber field,highest control effect on whitefly reached 77.14％ and 42.86％,respectively,but 5 ∶ 1 intercropping ratio was not significantly different from that of the control group.Only in the early and middle stage of cucumber growth,there was a certain control effect on whitefly when peripherally planting celery in the cucumber field,and no significant control effect was found in the late growth stage.When celery was interplanted with tomato by a ratio of 3∶ 1 or 5∶ 1,highest control effect on whitefly reached 90.12％ and 75.49％,respectively,but the control effect was not significant compared with that of the control when the celery was intercropped by a ratio of 8∶ 1.Only in the early stage of tomato growth,peripheral planting of celery had a certain control effect on whiteflies in the tomato field,and there was no significant control effect in the middle and late growth stage of tomato.