Control ability of extrats fromAjuga plants on some pests

Darva, Bela; Toledano, Josep Coll; Chi, Defu; Li, Yuwen; Chuanling, Jin; Yanming, Lou; Tai, Wu Jing

doi:10.1007/bf02855410

Cited by 4 publications

(2 citation statements)

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“…More than 130 kinds of phytoecdysteroids have been found in both annuals and perennials plants (Laurence 2001). The most common compounds are 20-OH ecdysone, cyasterone, makisterone, ajugalactone, and makisterone (Darvas et al 1997). The concentration of phytoecdysteroids in plants is higher than that in insects (Qian et al 2015).…”

Section: Introductionmentioning

confidence: 99%

“…Phytoecdysteroids can be applied for the improvement of the output of silk and pest control (Chou and Lu 1980;Ninagi and Maruyama 1996). The pesticide characteristic of phytoecdysteroids on some pests, such as Clostera anastomosis (Linnaeus), Stilpnotia candida (Staudinger), Tuberolachnus salignus (Gmelin), Hyphantria cunea (Drury), Aporia crataegi Linnaeus, Malacosoma neustria testacea Motschulsky, Lymantria dispar L., Aphrophora intermedia Uhler, Parthenolecanium corni (Bouche), and Myzus persicae (Sulzer) have been studied (Shao et al 1997;Chi et al 1997a, b;Darvas et al 1997). In 2002, eight types of phytoecdysteroids extracted from Ajuga multiflora Bunge were found to have killing effects on the larvae of Cryptorrhynchus lapathi L. (Chi et al 2002).…”

Section: Introductionmentioning

confidence: 99%

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β-Ecdysterone accumulation and regulation in Ajuga multiflora Bunge suspension culture

2018

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Bunge cells contain β-ecdysterone (β-EC) that regulates the molting process of insect larvae. In this study, different conditions of culture have been studied to optimize the production of β-EC. Bunge growth fitted the curve of logistic equation with one growth cycle of 17 days. The electric conductivity of medium had a negative correlation with not only the weight of dry cell but also the β-EC accumulation, and thus, could be used for monitoring the peak of both cell growth and β-EC accumulation. The pH value of the culture medium varied from 4.67 to 5.84 and reached the maximum at the end of the culture (on the 17th day). The relation of cell growth and nutrient consumption in Bunge cell suspension culture was distinctly correlated. Continuous subculture caused a reduction in β-EC synthesis; passages 7-15, the β-EC content declined ( < 0.05). At passage 11, the β-EC content was only 42.72% of that at passage 5. Additives such as mevalonic acid (MVA), l-phenylalanine (l-Phe), α-pinene, terpineol, and nitric oxide (NO) in the suspension culture medium, could significantly promote the cell growth and stimulate β-EC accumulation. The optimal concentrations of l-Phe, MVA, terpineol, and α-pinene were 0.2 mmol/l, 10 mg/l, 1 mmol/l and 6 mmol/l, respectively, with the β-EC concentrations as 1.914 ± 0.1948 mg/g ( < 0.01), 6.012 ± 0.4252 mg/g ( < 0.01), 5.147 ± 0.4819 mg/g ( < 0.01), 2.801 ± 0.1253 mg/g ( < 0.01), respectively. The optimal concentration of sodium nitroprusside, the provider of NO, was 3 mmol/l with the β-EC concentration 2.87 ± 0.2493 mg/g ( < 0.01). The results offer a strategy for massive production of β-EC.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%