Interaction of Spinosad and Bacillus thuringiensis on Certain Toxicological, Biochemical and Molecular Aspects in the Egyptian Cotton Leaf Worm, Spodoptera littoralis (Boisduval) (Lepidoptera: Noctuidae)

2019 ◽  
Vol 27 (2) ◽  
pp. 508
Author(s):  
E.M. Abd El-Samei ◽  
H.M. Hamama ◽  
M.G.A.A. El-Enien ◽  
H.H. Awad
Keyword(s):  
Bacillus Thuringiensis ◽  
Spodoptera Littoralis ◽  
Cotton Leaf ◽  
Molecular Aspects ◽  
Egyptian Cotton ◽  
Lepidoptera Noctuidae

scholarly journals What You Eat Matters: Nutrient Inputs Alter the Metabolism and Neuropeptide Expression in Egyptian Cotton Leaf Worm, Spodoptera littoralis (Lepidoptera: Noctuidae)

2021 ◽  
Vol 12 ◽  
Author(s):  
Cansu Doğan ◽  
Gözde Güney ◽  
Kardelen K. Güzel ◽  
Alp Can ◽  
Dwayne D. Hegedus ◽  
...  
Keyword(s):  
Lipid Droplet ◽  
Spodoptera Littoralis ◽  
Cotton Leaf ◽  
Nutrient Inputs ◽  
High Fat ◽  
Adipokinetic Hormone ◽  
Developmental Duration ◽  
Genes Encoding ◽  
Egyptian Cotton ◽  
Lepidoptera Noctuidae

Graphical AbstractThe parameters examined in Spodoptera littoralis larvae in response to four different diets, high-fat, high-sugar, calcium-rich and plant-based are shown starting with the developmental duration, weight, triglyceride and trehalose levels, lipid droplet structure, and finally with expression of four neuropeptide genes encoding adipokinetic hormone (AKH), insulin-like peptide 1 (ILP1), insulin-like peptide 2 (ILP2) and short neuropeptide F (sNPF).

scholarly journals Combinational Effect of Rumex tingitanus (Polygonaceae) Hexane Extract and Bacillus thuringiensis  δ-Endotoxin against Spodoptera littoralis (Lepidoptera: Noctuidae)

2018 ◽  
Vol 2018 ◽  
pp. 1-7 ◽  
Author(s):  
Dhekra Mhalla ◽  
Dalel Ben Farhat-Touzri ◽  
Slim Tounsi ◽  
Mohamed Trigui
Keyword(s):  
Biological Activity ◽  
Chemical Composition ◽  
Bacillus Thuringiensis ◽  
Synergistic Effect ◽  
Spodoptera Littoralis ◽  
Insect Pests ◽  
Hexane Extract ◽  
Active Fraction ◽  
Lepidoptera Noctuidae ◽  
Potential Use

The increasing insect resistance against Bacillus thuringiensis delta-endotoxins is a serious problem which makes it urgent to look for new eco-friendly strategies. Combining these toxins with other biomolecules is one of the promising strategies against insect pests. In this work, we evaluated the bioinsecticidal potential of Rumex tingitanus extracts and B. thuringiensis strain BLB250 against Spodoptera littoralis (Lepidoptera: Noctuidae) larvae. The chemical composition of the hexane extract, the most active fraction, was analyzed to validate the correlation between chemical composition and biological activity. Among the tested extracts, only the hexanic extract showed toxicity against first and second instar larvae with LC50 of 2.56 and 2.95 mg g−1, respectively. The Bacillus thuringiensis BLB250 delta-endotoxins showed toxicity with an LC50 of 56.3 μg g−1. Therefore, the investigated combinational effect of BLB250 delta-endotoxins and R. tingitanus hexane extract proved significant synergistic effect against S. littoralis larvae. The GC-MS analysis of R. tingitanus hexane extract showed the richness of this extract in phytosterols such as β and γ-sitosterol (48.91%), campesterol (6.43%), and β-amyrin (8.92%) which are known for their insecticidal activity. This novel finding highlights the potential use of this combination against insect pests to prevent the appearance of resistance problems.

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