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 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 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

scholarly journals PENGARUH FRAKSI AKTIF AGLAIA HARMSIANA PERKINS (MELIACEAE) TERHADAP FISIOLOGI LARVA SPODOPTERA LITURA (F.) (LEPIDOPTERA: NOCTUIDAE)

2006 ◽  
Vol 6 (1) ◽  
pp. 1-8
Author(s):  
Eka Candra Lina ◽  
Djoko Prijono ◽  
Dadang Dadang
Keyword(s):  
Growth Rate ◽  
Relative Growth Rate ◽  
Topical Application ◽  
Insecticidal Activity ◽  
Spodoptera Litura ◽  
Preparation Method ◽  
Seed Extract ◽  
Active Fraction ◽  
Relative Growth ◽  
Lepidoptera Noctuidae

The effect of active fraction Aglalia harmsiana Perkins (Meliaceae) to physiology of Spodoptera litura (F.) (Lepidoptera : Noctuidae) larvae. This study was conducted to evaluate the physiological interferences in the soybean armyworm Spodoptera litura caused by active fractions of Aglaia harmsiana seed extract.  The activity of the test materials was assessed by dietary preparation and topical application method. Repeated fractionations of A. harmsiana extract by chromatographic methods yielded two active fractions, designated as fraction 2-7 (0.0184%) and 2-8 (0.3773%). The results showed that fraction 2-8 had strong insecticidal activity against S. litura larvae, with LC50 by topical application and dietary preparation were 0.49% and 0.0044%, respectively.  A sublethal treatment with the active fraction (LC25) reduced the relative growth rate, efficiency of conversion of ingested food, and efficiency of conversion of digested food by 52.9%, 42.9%, 49.6% with topical application and 66.7%, 50%, 63.8% with dietary preparation method.  The treatments with that fraction at LC10 and LC25 to the fourth instars reduced the activity of invertase enzyme by 34% and 47%, but increased the activity of trehalase by 6.2% and 12.5% as compared with controls.

scholarly journals Aktivitas biologi enam jenis ekstrak tumbuhan famili Asteraceae terhadap larva Spodoptera litura Fabricius (Lepidoptera: Noctuidae)

2017 ◽  
Vol 2 (1) ◽  
pp. 51
Author(s):  
Ratna Sari Dewi ◽  
Dadang Dadang
Keyword(s):  
Insecticidal Activity ◽  
Spodoptera Litura ◽  
Growth Regulation ◽  
Insect Pests ◽  
Test Method ◽  
Choice Test ◽  
Larval Feeding ◽  
Helianthus Annus ◽  
Elephantopus Scaber ◽  
Lepidoptera Noctuidae

Biological Activity of Six Plan Extract from Asteraceae on Spodoptera litura Fabricius (lipedoptera : Noctuidae) Larvae. Asteraceae is one of plant family that is known to have insecticidal activity to several insect pests, such as Parthenium argentatum, Crysanthemum cineariaefolium, and Agerantum houstoneanum. The aim of this study is to explore other asteraceae species in other to search for insecticidal activity to Spodoptera litura Fabricius (Lepidoptera: Noctuidae). Six species, Blumea balsamifera (leaf), Elephantopus scaber (leaf), Gynura procumbens (leaf) Artemisia vulgaris (leaf) Soncbus arvensis (leaf) and Helianthus annus (seed) were use in this study. Plant extract were obtained by meseration method using menthanol. The extract were bioassayed to the second instar larvae of S. litura to evaluate the mortality, antifeedant and growth regulation activity. Extract of B. balsamifera and E. scaber have high antifeedant activity at 5 % by reducing larval feeding 87.7% and 81.8% in no choice test, and 94.1% and 86.1% in choice test method, respectively Extract of H. annus, A. vulgaris, and E. scaber prolonged the development of larvae by 4.9, 4.1, 3.9 days, respectively. While extract of H. annus caused mortality of larvae by 86% at 5%.

scholarly journals Pathogenicity of Metarhizium rileyi (Farlow) Kepler, S.A. Rehner and Humber isolates against Spodoptera litura (Fabricius) and their extracellular enzymatic activities

2021 ◽  
Vol 31 (1) ◽  
Author(s):  
Gurmehar Kaur Grewal ◽  
Neelam Joshi ◽  
Yadhu Suneja
Keyword(s):  
Spodoptera Litura ◽  
Larval Mortality ◽  
Screening Methods ◽  
Metarhizium Rileyi ◽  
Percent Mortality ◽  
Commercially Important ◽  
Extracellular Enzymatic Activities ◽  
Chemical Pesticides ◽  
Lepidoptera Noctuidae

Abstract Background Spodoptera litura (Fab.) (Lepidoptera: Noctuidae) is a serious agricultural pest that infests many commercially important crops of Southeast Asian countries. Indiscriminate use of chemical pesticides has led to various health hazards as well as insecticide resistance. Entomopathogenic fungi (EPF) provide an important alternative as biological control agents. Metarhizium rileyi is an EPF with a specific host range for lepidopteran pests. The present study aimed to identify virulent M. rileyi isolate against S. litura larvae and analyse their extracellular cuticle-degrading enzyme activities. Results Three M. rileyi isolates viz M. rileyi NIPHM, M. rileyi MTCC 4254 and M. rileyi MTCC 10395 formulations were evaluated at different concentrations against 2nd instar larvae of S. litura. A maximum percent mortality of 63.33% was recorded in M. rileyi NIPHM (12 g/l), followed by M. rileyi MTCC 4254 (58.33%) at the same concentration, 10 days post-treatment. Maximum means of chitinase, protease and lipase activities (0.44, 1.58 and 2.95 U/ml, respectively) were recorded in the case of M. rileyi NIPHM. Correlation analysis was positive between enzyme activity and larval mortality. Conclusions Metarhizium rileyi NIPHM recorded the highest enzymatic activity and exhibited the maximum mortality rate against 2nd instar larvae of S. litura, suggesting the possible role of these enzymes in the pathogenicity of the fungus. Further knowledge in this regard may help in the development of enzyme-based screening methods for selecting virulent fungal isolates for the eco-friendly management of crop pests.

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