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Flower diet enhances Adalia bipunctata larval development significantly when prey is limited
Entomologia Experimentalis et Applicata ( IF 1.9 ) Pub Date : 2021-05-05 , DOI: 10.1111/eea.13068
Liv Linea Holm 1 , Xueqing He 2 , Lene Sigsgaard 1
Affiliation  

Predaceous coccinellids can feed on non-prey food, but the ecological value of this feeding to maintain a coccinellid population is not well understood. Prey density can vary greatly in the field, whereas non-prey food sources such as pollen and nectar are more predictable. In the present study, Adalia bipunctata L. (Coleoptera: Coccinellidae) larval performance on pure and mixed diets of a high-quality non-prey food with varying amounts of prey was investigated. Rosy apple aphid, Dysaphis plantaginea Passerini (Hemiptera: Aphididae), served as prey in the experiment and was given to A. bipunctata larvae either ad libitum as a surplus diet or as a limited diet, the amount of which was selected so that it would limit larval development, according to a pilot study. Flowers of buckwheat, Fagopyrum esculentum L. (Polygonaceae), a high-value floral diet, served as the non-prey food. Newly hatched A. bipunctata larvae were reared on each of five diets: (1) flowers only, (2) limited prey only, (3) limited prey plus flowers, (4) surplus prey only, (5) surplus prey plus flowers. Larval survival, developmental time, and adult dry weight were measured. The addition of floral diet had a significant positive impact on A. bipunctata larval survival and development when prey diet was limited, survival ratio was 6× higher and developmental time was 25% shorter. In conclusion, A. bipunctata immature development can benefit from a floral diet supplemented to a prey diet, which indicates that the use of flowers in cropping systems can help to enhance biocontrol services by A. bipunctata.

中文翻译:

当猎物有限时,花卉饮食可显着增强 Adalia bipunctata 幼虫的发育

捕食性瓢虫可以以非猎物为食,但这种喂养对维持瓢虫种群的生态价值尚不清楚。猎物密度在野外可能会有很大差异,而花粉和花蜜等非猎物食物来源更容易预测。在本研究中,研究了Adalia bipunctata L.(鞘翅目:瓢虫科)幼虫在含有不同数量猎物的优质非猎物食物的纯饮食和混合饮食中的表现。玫瑰苹果蚜,Dysaphis plantaginea Passerini(半翅目:Aphididae),作为实验中的猎物,被给予A. bipunctata根据一项初步研究,幼虫可以随意作为多余的饮食或作为有限的饮食,其数量的选择是为了限制幼虫的发育。荞麦的花,Fagopyrum esculentum L.(蓼科),一种高价值的花卉饮食,作为非猎物食物。新孵化的A . bipunctata幼虫在五种饮食中分别饲养:(1)仅花,(2)仅有限猎物,(3)有限猎物加花,(4)仅剩余猎物,(5)剩余猎物加花。测量幼虫存活、发育时间和成虫干重。添加花卉饲料对A. bipunctata有显着的积极影响当猎物饮食有限时,幼虫的存活和发育,存活率是 6 × 更高,发育时间是 25%更短。总之,A. bipunctata 的未成熟发育可以从补充猎物饮食的花卉饮食中受益,这表明在种植系统中使用花卉有助于增强A. bipunctata 的生物防治服务。
更新日期:2021-07-12
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