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首页> 外文期刊>Biocontrol Science and Technology >Effect of supplementary feeding of Oecophylla longinoda on their abundance and predatory activities against cashew insect pests
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Effect of supplementary feeding of Oecophylla longinoda on their abundance and predatory activities against cashew insect pests

机译：补饲长叶油菜对其腰果害虫的丰度和掠食性活动的影响

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Many studies have shown the efficiency of using weaver ants (Oecophylla species) as natural biocontrol agents against agricultural pests. Supplementary feeding could promote fast growth of this ant's population and discourage them from moving away. However, such artificial feeding might slow down ants search rates and in this way make them less efficient bio-agents. The experiments were conducted for two consecutive seasons at Naliendele Research Station. Cashew trees planted at a spacing of 12 m x 12 m in 2002 were used to investigate whether supplementary feeding could enhance foraging behaviour of Oecophylla longinoda. Fed O. longinoda colonies fed weaver ants (FWA) were supplemented with a 30% sugar solution and approximately 22 g of finely ground fish meat at two-week intervals while the unfed colonies unfed weaver ants (UWA) had access to only naturally occurring food sources. Weaver ant densities and pest damage were monitored fortnightly on newly damaged shoots, panicles and fruits and nut yields assessed after each harvest season. The results revealed that there was a significant difference (P 0.05) with higher weaver ant densities in the FWA compared to UWA colonies and significantly lower (P 0.05) pest damage levels were recorded on weaver ant treatments compared to plots without weaver ants. No significant differences (P 0.05) in yields and mean damage levels were recorded between the two weaver ant treatments. Highest nut yield (4.22 +/- 0.30 kg/tree and 5.37 +/- 0.27 kg/tree) was recorded in the fed colonies, followed by non-fed colonies (4.20 +/- 0.30 kg/tree and 4.88 +/- 0.24 kg/tree) and the least (2.66 +/- 0.19 kg/tree and 2.99 +/- 0.19 kg/tree) was recorded from the untreated controls in 2012/2013 and 2013/2014, respectively. The studies indicated that supplementary feeding could boost weaver ants to higher population levels without reducing their effectiveness as biocontrol agents.
机译：许多研究表明，使用织叶蚁（Oecophylla种）作为抗农业害虫的天然生物防治剂的有效性。补充喂养可以促进该蚂蚁种群的快速增长，并阻止他们迁徙。但是，这种人工喂养可能会减慢蚂蚁的搜索速度，从而使它们的生物制剂效率降低。实验在Naliendele研究站连续进行了两个季节。 2002年以12 m x 12 m的间隔种植的腰果用于调查补充饲喂是否可以增强长叶Oecophylla longinoda的觅食行为。以两周为间隔，向长饲喂的织叶蚂蚁（FWA）补充30％的糖溶液和约22 g细磨的鱼肉，而未饲喂的未饲喂织叶蚁（UWA）仅能获得天然食物资料来源。每两周对新近受损的芽，穗和果实进行Weaver蚂蚁密度和害虫损害监测，并在每个收获季节后评估坚果产量。结果表明，与UWA菌落相比，FWA中较高的编织蚁密度存在显着差异（P <0.05），与不使用编织蚁的地块相比，在编织蚁处理中记录的病虫害危害水平明显较低（P <0.05）。两种织叶蚁处理之间的产量和平均破坏水平没有显着差异（P> 0.05）。饲喂菌落的坚果产量最高（4.22 +/- 0.30 kg /树和5.37 +/- 0.27 kg /树），其次是非饲喂菌落（4.20 +/- 0.30 kg /树和4.88 +/- 0.24分别从2012/2013年和2013/2014年未经处理的对照中记录到的数据最少，分别为2.66 +/- 0.19 kg /棵和2.99 +/- 0.19 kg /棵。研究表明，补充饲喂可以将织布蚁提高到更高的种群水平，而不会降低它们作为生物防治剂的有效性。

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