Influence of tannic acid on the insecticidal activity of a Bacillus thuringiensis serovar aizawai formulation against Spodoptera litura fabricius (Lepidoptera: Noctuidae)

2021 ◽  
Vol 157 ◽  
pp. 104558
Author(s):  
Shinji Isayama ◽  
Takeshi Suzuki ◽  
Madoka Nakai ◽  
Yasuhisa Kunimi
Keyword(s):  
Bacillus Thuringiensis ◽  
Tannic Acid ◽  
Insecticidal Activity ◽  
Spodoptera Litura ◽  
Lepidoptera Noctuidae

scholarly journals AKTIVITAS EKSTRAK BIJI TANAMAN MINDI MELIA AZEDARACH (L.) TERHADAP SPODOPTERA LITURA (F.) (LEPIDOPTERA: NOCTUIDAE)

2005 ◽  
Vol 5 (1) ◽  
pp. 11-16
Author(s):  
Hamdani Hamdani
Keyword(s):  
Biological Activity ◽  
Insecticidal Activity ◽  
Spodoptera Litura ◽  
Developmental Time ◽  
Seed Extract ◽  
Melia Azedarach ◽  
The Third ◽  
First Instar ◽  
Lepidoptera Noctuidae

Activity of Melia azedarach (L.) seed extract against armyworm Spodoptera litura (F.) (Lepidoptera: Noctuidae). This study was conducted to evaluate the effectivenes and biological activity of Melia azedarach L. (Meliaceae) seed extract against armyworm, Spodoptera litura F. The first instar larvae were fed extract-treated cotton leaves for 2 days, then were maintained on untreated leaves until the third instar stage. Records were kept in regard to the larvae mortality and developmental time of surviving larvae from first instar to third instar. The result showed that Melia azedarach L. seed extract at consentration of 50 g of seeds/l of water (5%) exhibited moderate insecticidal activity against S. litura larvae (43.33 - 68.33% mortality). Addition of detergen at 0.2% to extract did not increase insecticidal activity of the extract. However, boiling seed extract at consentration of 50 g of seeds/l of water (5%) during 10 until 20 minutes increased insecticidal activity of extract (66.67 - 68.33% mortality). Generally, M. azedarach seed extract treatment did not affect  developmental time of  S. litura larvae.

Insecticidal Activity and Histopathological Effects of Vip3Aa Protein from Bacillus thuringiensis on Spodoptera litura

2016 ◽  
Vol 26 (10) ◽  
pp. 1774-1780 ◽  
Author(s):  
Feifei Song ◽  
Yunfeng Lin ◽  
Chen Chen ◽  
Ensi Shao ◽  
Xiong Guan ◽  
...  
Keyword(s):  
Bacillus Thuringiensis ◽  
Insecticidal Activity ◽  
Spodoptera Litura ◽  
Histopathological Effects

Synthesis of thymyl esters and their insecticidal activity against Spodoptera litura (Lepidoptera: Noctuidae)

2019 ◽  
Vol 76 (3) ◽  
pp. 928-935 ◽  
Author(s):  
Sorachat Tharamak ◽  
Thitaree Yooboon ◽  
Anchulee Pengsook ◽  
Atcharee Ratwatthananon ◽  
Nutchaya Kumrungsee ◽  
...  
Keyword(s):  
Insecticidal Activity ◽  
Spodoptera Litura ◽  
Lepidoptera Noctuidae

scholarly journals Oligomer Formation and Insecticidal Activity of Bacillus thuringiensis Vip3Aa Toxin

Toxins ◽  
2020 ◽  
Vol 12 (4) ◽  
pp. 274 ◽  
Author(s):  
Ensi Shao ◽  
Aishan Zhang ◽  
Yaqi Yan ◽  
Yaomin Wang ◽  
Xinyi Jia ◽  
...  
Keyword(s):  
Amino Acid ◽  
Bacillus Thuringiensis ◽  
Complex Formation ◽  
Insecticidal Activity ◽  
Spodoptera Litura ◽  
Insecticidal Proteins ◽  
Proteolytic Activation ◽  
Oligomer Formation ◽  
Lepidopteran Insects ◽  
Substitution Mutations

Bacillus thuringiensis (Bt) Vip3A proteins are important insecticidal proteins used for control of lepidopteran insects. However, the mode of action of Vip3A toxin is still unclear. In this study, the amino acid residue S164 in Vip3Aa was identified to be critical for the toxicity in Spodoptera litura. Results from substitution mutations of the S164 indicate that the insecticidal activity of Vip3Aa correlated with the formation of a >240 kDa complex of the toxin upon proteolytic activation. The >240 kDa complex was found to be composed of the 19 kDa and the 65 kDa fragments of Vip3Aa. Substitution of the S164 in Vip3Aa protein with Ala or Pro resulted in loss of the >240 kDa complex and loss of toxicity in Spodoptera litura. In contrast, substitution of S164 with Thr did not affect the >240 kDa complex formation, and the toxicity of the mutant was only reduced by 35%. Therefore, the results from this study indicated that formation of the >240 kDa complex correlates with the toxicity of Vip3Aa in insects and the residue S164 is important for the formation of the complex.

Insecticidal activity of pogostone against Spodoptera litura and Spodoptera exigua (Lepidoptera: Noctuidae)

2013 ◽  
Vol 70 (3) ◽  
pp. 510-516 ◽  
Author(s):  
Si-Han Huang ◽  
Ji-Dong Xian ◽  
Song-Zhi Kong ◽  
Yu-Cui Li ◽  
Jian-Hui Xie ◽  
...  
Keyword(s):  
Insecticidal Activity ◽  
Spodoptera Litura ◽  
Spodoptera Exigua ◽  
Lepidoptera Noctuidae
Sign in / Sign up

Export Citation Format

Share Document