scholarly journals EFFECTS OF THREE PESTICIDES ON SOME BIOLOGICAL ASPECTS OF COTTON LEAF WORM (Spodoptera littoralis, BOISD) LARVAE UNDER LABORATORY CONDITIONS .

2012 ◽  
Vol 3 (12) ◽  
pp. 1345-1352
Author(s):  
E. Marzouk ◽  
M. Megahed ◽  
W. Abouamer ◽  
M. El-Bamby
Keyword(s):  
Spodoptera Littoralis ◽  
Cotton Leaf ◽  
Laboratory Conditions ◽  
Biological Aspects

scholarly journals Toxicological, biological and biochemical effects of two nanocomposites on cotton leaf worm, Spodoptera littoralis (Boisduval, 1833)

2020 ◽  
Vol 89 (2) ◽  
pp. 101-112
Author(s):  
Soheir F. Abd El-Rahman ◽  
Sayeda S. Ahmed ◽  
Mahmoud H. Abdel Kader
Keyword(s):  
Graphene Oxide ◽  
Mortality Rate ◽  
Spodoptera Littoralis ◽  
Larval Mortality ◽  
Adult Emergence ◽  
Pupal Weight ◽  
Cotton Leaf ◽  
Biochemical Effects ◽  
Total Carbohydrates ◽  
Biological Aspects

Cotton leaf worm, Spodoptera littoralis (Boisduval, 1833), is one of the most dangerous pests in Egypt, causing economically significant losses of different crops. The present study was aimed to evaluate toxicological, biological and biochemical effects of two nanocomposites, Silver (Ag) and graphene oxide (GO) nanomaterials over magnesium chlorophillin (Mg-Chl/Ag and Mg-Chl/GO) at three concentrations (1, 10, 100 ml/L) against 2nd instar larvae of S. littoralis. The results showed that larval mortality rate was positively correlated with the increase of concentrations of the tested nanocomposites and time after exposure. The mortality rate in nanographene oxide composite were higher than nano silver. LC50 (lethal concentration of 50% of a group of test larvae) values were 10.27 and 16.14 mg/L at Mg-Chl/Ag and Mg-Chl/GO compound at 2 h exposure to light. Some biological aspects of S. littoralis resulted from the treated 2nd instars larvae with two nanocomposites were recorded. Larval, pupal durations, pupation, adult emergence rate and pupal weight were significantly lower in all concentrations compared to untreated larvae. All tested samples showed decrease in total carbohydrates, total proteins and total lipids. Obtained results suggest that using silver and graphene oxide nanomaterials over the magnesium chlorophillin would be a useful component for controlling S. littoralis.

scholarly journals Field study on the effect of the Entomopathogenic Fungi Beauveria bassiana (Bals.) Vuil. On the cotton leaf worm Spodoptera littoralis (Boisd.) on potato plant.

2008 ◽  
Vol 2 (1) ◽  
pp. 24-32
Author(s):  
Sh. H. AL-Obaidi ◽  
L. K. AL-Ani ◽  
W. A. Hussain
Keyword(s):  
Field Study ◽  
Beauveria Bassiana ◽  
Entomopathogenic Fungi ◽  
Potato Plant ◽  
Spodoptera Littoralis ◽  
Infection Intensity ◽  
Soil Treatment ◽  
Cotton Leaf ◽  
Plant Yield ◽  
Potato Plants

A field study were conducted to evaluate the efficacy of the entomopathogenic fungi Beauveria bassiana as abiocontrol agent for the cotton leaf worm Spodoptera littoralis infesting potato plants. Results indicated that soil treatment of the entomopathogenic fungi significantly reduced the percentage of plant infestation to 64.3, 60.7 % after 14, 21 days. Results of the infection intensity also significantly reduced in treatment of entomopathogenic fungi in soil to 18.7, 9.9 pore/leaf after 14, 21 days of treatment.The results revealed the higher efficiency of entomopathogenic fungi on plant yield, it become 633.3 gm in entomopathogenic fungi in soil treatment.

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