The fitness advantages of bistrifluron resistance related to chitin synthase A in Spodoptera litura (Fab.) (Noctuidae: Lepidoptera)

2021 ◽  
Author(s):  
Changwei Gong ◽  
Xuegui Wang ◽  
Qian Huang ◽  
Jinyue Zhang ◽  
Yuming Zhang ◽  
...  
Keyword(s):  
Spodoptera Litura ◽  
Chitin Synthase

scholarly journals Identification and Functional Analysis of Two Chitin Synthase Genes in the Common Cutworm, Spodoptera litura

Insects ◽  
2020 ◽  
Vol 11 (4) ◽  
pp. 253
Author(s):  
Hai-Zhong Yu ◽  
Ning-Yan Li ◽  
Yan-Xin Xie ◽  
Qin Zhang ◽  
Ying Wang ◽  
...  
Keyword(s):  
Spodoptera Litura ◽  
Biochemical Properties ◽  
Chitin Synthase ◽  
Expression Level ◽  
Transcriptional Analysis ◽  
Amino Acid Residues ◽  
Common Cutworm ◽  
The Common ◽  
Main Components ◽  
Important Enzyme

Chitin is one the main components of the insect cuticle, and chitin synthase (CHS) is an important enzyme required for chitin formation. CHS has been characterized in various insect species, but the structure and biochemical properties in Spodoptera litura have not been determined. In this study, we identified two CHS genes, SlCHS1 and SlCHS2, which encode proteins with 1565 and 1520 amino acid residues, respectively. Transcriptional analysis suggested that SlCHS1 has a high expression level in the integument whereas SlCHS2 showed the highest expression level in the midgut. During S. litura growth and development, SlCHS1 and SlCHS2 were both predominantly expressed in the fourth-instar larval stage. In addition, the expression of SlCHS1 and SlCHS2 could be induced by 20-hydroxyecdysone (20E). Silencing of SlCHS1 by RNA interference significantly inhibited the pupation and molting of S. litura larvae (RNAi), while knockdown of SlCHS2 had no significant effects on the S. litura phenotype. These results may provide a new molecular target for control of S. litura.

Negative cross resistance of Spodoptera litura Fabricius population of tomato to newer molecule spinetoram

ENTOMON ◽  
2019 ◽  
Vol 44 (2) ◽  
pp. 127-132
Author(s):  
M. Visnupriya ◽  
N. Muthukrishnan
Keyword(s):  
Spodoptera Litura ◽  
Laboratory Strain ◽  
Field Population ◽  
Resistance Ratio ◽  
Cross Resistance ◽  
In Vivo Toxicity

Field population of Spodoptera litura from tomato ( resistant to the majority of the conventional insecticide molecules) were subjected to the in vivo toxicity of spinetoram 12 SC to assess whether cross resistance exists or not. Untreated larvae of both field and laboratory strains showed no mortality during 48 hours of feeding. After 48 hours of feeding on spinetoram 12 SC treated leaves, LC50s of field larvae were 0.28, 0.93, 3.71 and 7.11 ppm for the 2nd, 3rd, 4th and 5th instars of S. litura respectively. However, in the laboratory strain these values were 1.12, 5.86, 36.72 and 91.55 ppm for 2nd, 3rd, 4th and 5th instars of S. litura respectively. Resistance ratio was 0.25, 0.16, 0.10 and 0.08 for the 2nd instar up to the 5th instar of S. litura.

Peramalan Serangan Hama Tanaman Tembakau (Nicotiana tabaccum) pada Fase Vegetatif di PT. Tarutama Nusantara Jember

2020 ◽  
Author(s):  
Irma Harlianingtyas ◽  
◽  
Ramadhan Taufika ◽  
Keyword(s):  
Spodoptera Litura ◽  
Nicotiana Tabaccum

Tembakau adalah produk pertanian semusim yang bukan termasuk dalam komoditas perkebunan. Produk ini dikonsumsi bukan untuk makanan tetapi sebagai pengisi waktu luang yaitu sebagai bahan baku rokok dan cerutu. Tembakau juga dapat dikunyah. Kandungan metabolit sekunder yang kaya juga membuatnya bermanfaat sebagai pestisida dan bahan baku obat. Salah satu tantangan dalam budidaya tembakau adalah adanya organisme pengganggu tanaman. Serangan hama dan penyakit dapat mempengaruhi kualitas maupun kuantitas hasil panen tembakau. Serangan hama dan penyakit yang paling banyak terjadi adalah pada saat fase vegetatif, karena pada vase ini semua bagian tanaman menjadi sasaran makanan bagi organisme pengganggu tanaman. Organisme pengganggu tanaman yang dianggap sebagai hama pada vase vegetattif tanaman tembakau adalah ualt tanah, ulat daun, belalang, kupu, gayas/jangkrik. Kegiatan penelitian ini dilakukan di PT Tarutama Nusantara Jember, data yang digunakan adalah data serangan hama yang terjadi pada seluruh kebun milik TTN dari tahun 2013 hingga 2019. Tujuan dilakukan penelitian ini adalah mengtahui prediksi serangan hama yang akan terjadi guna mempermudah perusahaan dalam menentukan strategi dan kebijakan guna meningkatkan produksi tembakau khususnya sebagai pelapis cerutu dekblad/wrapper. Metode penelitian yang digunakan untuk memprediksi serangan hama yang terjadi adalah metode regresi linier. Hasil penelitian menunjukkan prediksi serangan hama ulat tanah (Agrotis iplison) tahun 2021 sebesar 15,6%, ulat grayak (Spodoptera litura) sebesar 19,08%, serangan hama belalang sebesar 15,77%, dan serangan hama ketep (Setomorpha rutella) sebesar 15,23%, serta serangan hama jangkrik (Gryllidae) pada tahun 2021 adalah sebesar 8,20%.

Diverse sources of resistance to Spodoptera litura (F.) in groundnut

2019 ◽  
Vol 79 (01S) ◽  
Author(s):  
M. A. Saleem ◽  
G. K. Naidu ◽  
H. L. Nadaf ◽  
P. S. Tippannavar
Keyword(s):  
Recombinant Inbred ◽  
Spodoptera Litura ◽  
Hot Spot ◽  
Recombinant Inbred Lines ◽  
Insect Pest ◽  
Inbred Lines ◽  
Leaf Damage ◽  
Botanical Variety ◽  
Resistant Genotypes ◽  
Botanical Varieties

Spodoptera litura an important insect pest of groundnut causes yield loss up to 71% in India. Though many effective chemicals are available to control Spodoptera, host plant resistance is the most desirable, economic and eco-friendly strategy. In the present study, groundnut mini core (184), recombinant inbred lines (318) and elite genotypes (44) were studied for their reaction to Spodoptera litura under hot spot location at Dharwad. Heritable component of variation existed for resistance to Spodoptera in groundnut mini core, recombinant inbred lines and elite genotypes indicating scope for selection of Spodoptera resistant genotypes. Only 29 (15%) genotypes belonging to hypogaea, fastigiata and hirsuta botanical varieties under mini core set, 15 transgressive segregants belonging to fastigiata botanical variety among 318 recombinant inbred lines and three genotypes belonging to hypogaea and fastigiata botanical varieties under elite genotypes showed resistance to Spodoptera litura with less than 10% leaf damage. Negative correlation existed between resistance to Spodoptera and days to 50 per cent flowering indicating late maturing nature of resistant genotypes. Eight resistant genotypes (ICG 862, ICG 928, ICG 76, ICG 2777, ICG 5016, ICG 12276, ICG 4412 and ICG 9905) under hypogaea botanical variety also had significantly higher pod yield. These diverse genotypes could serve as potential donors for incorporation of Spodoptera resistance in groundnut.

PENGARUH PEMBERIAN KONSENTRASI BIOINSEKTISIDA DAUN DAN BIJI MIMBA (Azadirachta indica) TERHADAP KEMATIAN ULAT GRAYAK (Spodoptera litura)

2018 ◽  
Vol 10 (02) ◽  
Author(s):  
P. S. Ajiningrum ◽  
I. A. K. Pramushinta
Keyword(s):  
Spodoptera Litura ◽  
Leaf Extract ◽  
Final Analysis ◽  
Seed Extract ◽  
Mortality Data ◽  
Botanical Insecticide ◽  
Nutritional Content ◽  
Variant Analysis ◽  
The Tropics ◽  
Army Worm

Red spinach (Alternanthera amoena) is one of the vegetable commodities that many people in demand for consumption because of its high nutritional content. Efforts to increase the production of red spinach often experience various obstacles. The main obstacle that limits the productivity of red spinach in the tropics is the number of Plant Disturbing Organisms  in the form of pests and potential diseases that can attack and decrease the production of spinach. One of the pests that often attack spinach is the existence of army worm (Spodoptera litura F.). Therefore, farmers need a way to eradicate the pest. This research is experimental using Random Complete Group. The data obtained were analyzed with variant analysis (ANOVA) in one direction and continued with LSD (Least Significant Different) test. Provision of botanical insecticide done by spraying the extract of leaves and seeds mimba with concentration dose 0%, 5%, 10% and 15%. In the final analysis of mortality data of army worm (Spodoptera litura F.) treated with mimba leaf extract obtained significant value of 76.263 at a significant level of 0.05 so it can be concluded that there is influence of mimba leaf extract on mortality of army worm. In the final analysis of mortality data of army worm (Spodoptera litura F.) treated with mimba seed extract obtained significant value of 78.625 at a significant level of 0.05 so it can be concluded that there is an effect of mimba seeds extract on mortality army worm.   Keywords: mimba leaf extract,  mimba seed extract, red spinach (Alternanthera amoena), army worm (Spodoptera litura F.), botanical insecticide

Effect of Fungicides on Growth and Development of Spodoptera litura

2017 ◽  
Vol 3 (2) ◽  
Author(s):  
Kuldeep Srivastava ◽  
Sonika Sharma ◽  
Devinder Sharma ◽  
Ramesh Kumar
Keyword(s):  
Growth And Development ◽  
Spodoptera Litura

Integrated Management of Spodoptera litura: A Rewiew

2018 ◽  
Vol 4 (1) ◽  
Author(s):  
Kuldeep Srivastava ◽  
Devinder Sharma ◽  
AKD Anal ◽  
Sonika Sharma
Keyword(s):  
Spodoptera Litura ◽  
Integrated Management
Sign in / Sign up

Export Citation Format

Share Document