New lethal liquid bait for control of pest ants

IF 4.3 1区 农林科学 Q1 ENTOMOLOGY
Asim Renyard, Kennedy Hoven, Charlotte Pinard, Gerhard Gries
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Abstract

An aqueous ant bait consisting of sucrose (4.55% w/v), essential amino acids (EAAs, 1%), and water is known to be highly appealing to multiple ant species throughout the foraging season. Here, we tested whether this bait, combined with boric acid as the lethal agent, has potential for control of pest ants. Specifically, we: (1) assessed bait lethality to diverse species of ants (European fire ants, Myrmica rubra, western carpenter ants, Camponotus modoc, thatching ants, Formica oreas); (2) tested the effect of boric acid concentration on mortality of M. rubra workers and colonies; (3) compared consumption, and demise timeline, of lethal liquid baits and lethal gel baits; and (4) investigated whether lethal liquid baits reduce the size of M. rubra colonies. In laboratory experiments, the bait induced rapid worker mortality (< 22 days) in all three species of ants tested. Increasing the concentration of boric acid from 1% to 5.4% accelerated the demise of only worker ants, but not queen ants, in M. rubra colonies, indicating that 1% boric acid is sufficiently lethal. Worker ants of M. rubra strongly preferred liquid baits to gel baits of identical nutrient composition, with the former bait accelerating worker demise. In a field experiment in a public park heavily infested with M. rubra, the 12 treatment colonies provided with a lethal liquid bait (4.55% sucrose; 1% EAAs; 1% boric acid) over 114 days significantly declined, whereas the 12 control colonies provided with the corresponding non-lethal bait did not. The bait, with appropriately adapted bait deployment protocol, should be tested for control of other pest ants, particularly those that preferentially feed on liquid foods.

Abstract Image

用于控制害蚁的新型致死液体诱饵
众所周知,一种由蔗糖(4.55% w/v)、必需氨基酸(EAAs,1%)和水组成的水性蚂蚁诱饵在整个觅食季节对多种蚂蚁具有很强的吸引力。在此,我们测试了这种饵料与作为致死剂的硼酸结合是否具有控制害蚁的潜力。具体来说,我们(1) 评估了饵料对不同种类蚂蚁(欧洲火蚁、红火蚁、西部木匠蚁、Camponotus modoc、茅草蚁)的致死率;(2) 测试了硼酸浓度对红火蚁工蚁和蚁群死亡率的影响;(3) 比较了致死液体饵料和致死凝胶饵料的消耗量和消亡时间轴;(4) 调查了致死液体饵料是否会减少红火蚁蚁群的规模。在实验室实验中,毒饵导致所有三种受测蚂蚁的工蚁迅速死亡(22 天)。将硼酸的浓度从 1%提高到 5.4%,只加速了工蚁的死亡,而没有加速红玛瑙蚁后的死亡,这表明 1%的硼酸具有足够的杀伤力。与营养成分相同的凝胶饵料相比,红花蚁工蚁更喜欢液体饵料,前者能加速工蚁的死亡。在一个被红蚁害严重侵扰的公共公园进行的现场实验中,12 个被施以致死液体诱饵(4.55% 蔗糖;1% EAAs;1% 硼酸)的处理蚁群在 114 天内显著减少,而 12 个被施以相应非致死诱饵的对照蚁群则没有减少。这种饵料,加上适当调整的饵料投放方案,应该用于控制其他害蚁,特别是那些以液体食物为食的害蚁。
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来源期刊
Journal of Pest Science
Journal of Pest Science 生物-昆虫学
CiteScore
10.40
自引率
8.30%
发文量
114
审稿时长
6-12 weeks
期刊介绍: Journal of Pest Science publishes high-quality papers on all aspects of pest science in agriculture, horticulture (including viticulture), forestry, urban pests, and stored products research, including health and safety issues. Journal of Pest Science reports on advances in control of pests and animal vectors of diseases, the biology, ethology and ecology of pests and their antagonists, and the use of other beneficial organisms in pest control. The journal covers all noxious or damaging groups of animals, including arthropods, nematodes, molluscs, and vertebrates. Journal of Pest Science devotes special attention to emerging and innovative pest control strategies, including the side effects of such approaches on non-target organisms, for example natural enemies and pollinators, and the implementation of these strategies in integrated pest management. Journal of Pest Science also publishes papers on the management of agro- and forest ecosystems where this is relevant to pest control. Papers on important methodological developments relevant for pest control will be considered as well.
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