Department of Zoology, Guru Nanak Dev University, Amritsar, Punjab, India.
Sci Rep. 2021 Jan 12;11(1):531. doi: 10.1038/s41598-020-80232-1.
The antibiosis effect of gallic acid on Spodoptera litura F. (Lepidoptera: Noctuidae) and its parasitoid evaluated by feeding six days old larvae on artificial diet incorporated with different concentrations (5 ppm, 25 ppm, 125 ppm, 625 ppm, 3125 ppm) of the phenolic compound revealed higher concentration (LC) of gallic acid had a negative impact on the survival and physiology of S. litura and its parasitoid Bracon hebetor (Say) (Hymenoptera:Braconidae). The mortality of S. litura larvae was increased whereas adult emergence declined with increasing concentration of gallic acid. The developmental period was delayed significantly and all the nutritional indices were reduced significantly with increase in concentration. Higher concentration (LC) of gallic acid adversely affected egg hatching, larval mortality, adult emergence and total development period of B. hebetor. At lower concentration (LC) the effect on B. hebetor adults and larvae was non-significant with respect to control. Gene expression for the enzymes viz., Superoxide dismutase, Glutathione peroxidase, Peroxidase, Esterases and Glutathione S transferases increased while the total hemocyte count of S. litura larvae decreased with treatment. Our findings suggest that gallic acid even at lower concentration (LC) can impair the growth of S. litura larvae without causing any significant harm to its parasitoid B. hebetor and has immense potential to be used as biopesticides.
没食子酸对斜纹夜蛾及其寄生蜂（鳞翅目：夜蛾科）的抑菌作用评价采用人工饲料喂养 6 日龄幼虫，不同浓度（5ppm、25ppm、125ppm、625ppm、3125ppm）的酚类化合物。结果表明，高浓度（LC）没食子酸对斜纹夜蛾及其寄生蜂（膜翅目：茧蜂科）的存活和生理有负面影响。斜纹夜蛾幼虫死亡率增加，成虫羽化率下降，且随着没食子酸浓度的增加，发育周期显著延迟，所有营养指标均显著降低。高浓度（LC）没食子酸对寄生蜂的卵孵化、幼虫死亡率、成虫羽化和总发育周期均有不利影响。在较低浓度（LC）下，寄生蜂成虫和幼虫的作用与对照相比不显著。超氧化物歧化酶、谷胱甘肽过氧化物酶、过氧化物酶、酯酶和谷胱甘肽 S 转移酶的酶活力增加，而斜纹夜蛾幼虫的总血细胞计数减少。研究结果表明，没食子酸即使在低浓度（LC）下也能损害斜纹夜蛾幼虫的生长，但对其寄生蜂（B. hebetor）没有造成任何显著伤害，具有作为生物农药的巨大潜力。
