Effects of Bio-Rational Insecticides on Selected Biological Aspects of the Egyptian Cotton Leafworm Spodoptera Littoralis (Boisd.) (Lepidoptera: Noctuidae)

Osman, Mohamed; Mahmoud, Mahmoud Farag

doi:10.2478/v10045-009-0018-0

Cited by 12 publications

(6 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It may be due to the former insecticides' ability to remove egg cortex. These findings are in conformity with those reported by Osman and Mahmoud (2009), who reported that Mectin and Spinosad had significant effects on the percentage of egg hatching of the Egyptian cotton leafworm, Spodoptera littoralis (Boisd. ).…”

Section: Discussionsupporting

confidence: 93%

Efficacy of eco-smart insecticides against certain biological stages of jasmine moth, Palpita unionalis Hb. (Lepidoptera: Pyralidae)

Mahmoud

2014

PESTIC PHYTOMED

View full text Add to dashboard Cite

SUMMARYThe efficacy of six eco-smart insecticides, Dipel 2x 6.4% WP (Bacillus thuringensis AI), Biofly 100% WP (Beauvaria bessiana AI), Radiant 12% SC (Saccharopolyspora spinosa AI), Mectin 1.8% EC (Streptomyces avermitilis AI), Nimbecidine 0.03% EC (Azadirachtin AI) and Bio-Power 50% EC (Beauvaria bessiana AI), were tested against eggs, larvae and pupae of the jasmine moth, Palpita unionalis Hb. and its parasitoid Apanteles syleptae under laboratory conditions. Data indicated that all tested insecticides had ovicidal activity against P. unionalis. Mectin was the most toxic among the tested insecticides against the egg stage, followed by Radiant or Dipel 2x, and their respective values of LC 50 were 0.005 cm/l, 0.006 cm/l and 0.055 g/l. Dipel 2x was the most toxic insecticide to the 1 st instar larvae of P. unionalis, whereas Mectin was the most toxic to both the 3 rd and 5 th instar larvae. Also, the results revealed that Mectin was the most effective against the pupal stage, followed descendingly by Radiant and Dipel 2x. The toxicity index values showed a superior efficiency of Mectin at LC 50 (100%) against eggs, 3 rd and 5 th instar larvae, and pupal stage, whereas Dipel 2x showed such superior efficiency at LC 50 (100%) only against 1 st instar larvae. The results showed that the percents of pupation and emergence of moths were significantly different in all treatments compared to control, while deformed pupae and malformed adults were insignificantly different when fifth instar larvae were treated with the tested insecticides. Moreover, the rate of P. unionalis adult emergence from treated pupae was concentration-dependent and significant differences were found between insecticide treatments and control. Generally, Mectin, Radiant and Dipel 2x caused the highest impacts on adult emergence and malformed adults percentages. Regarding the toxicity of insecticides to the endoparasitoid A. syleptae, the treated cocoons developed to adult stages with no significant differences compared to control. Meanwhile, the longevity of the emerged parasitoid adults did not differ among the insecticides treatments and control.

show abstract

Section: Discussionsupporting

confidence: 93%

Efficacy of eco-smart insecticides against certain biological stages of jasmine moth, Palpita unionalis Hb. (Lepidoptera: Pyralidae)

Mahmoud

2014

PESTIC PHYTOMED

View full text Add to dashboard Cite

show abstract

“…These results are in agreement with. Osman and Mahmoud (2009) mentioned that Dipel 2x, BioFly, Agrin, BioGaurd, Spinosad, Neemix, Mectin and Match provided higher mortality in the first instar larvae of Spodoptera littoralis compared to the third and fifth instar larvae, although Match, Mectin and Spinosad showed also excellent efficacy against the third larval stage at all tested concentrations.…”

Section: Resultsmentioning

confidence: 99%

Comparative Effect of Some Bio Insecticides with Chlorpyrifos on Cotton Leafworm

Amal

Hamid

Sobhy

2021

Egyptian Academic Journal of Biological Sciences, F. Toxicology

View full text Add to dashboard Cite

The cotton leafworm, Spodoptera littoralis (Boisd) is a key polyphagous pest in Egypt. Without a hibernation period, the cotton leafworm is active all year. It was the most destructive insect pest of the great variation of important vegetables and field crops, approximately 112 species belonging to 4411families are attacked by this pest. Among the wide range of hosts, cotton, soybean, maize, wheat and vegetable crops (e.g., tomato, potato and strawberry) are processes in insects such as chitin synthesis inhibitors, juvenile hormone mimics, and ecdysone agonists.This group of insecticides consists of various compounds acting on insects of different orders by inhibiting chitin formation, thereby causing abnormal endocuticular deposition and abortive molting. The activity of biochemical sites (IPM). They have high pathogenicity for target pests. Safe for most non-target organisms, and have good integration with other pest control methods (Ibrahim et al.,.2010).The principal aim of the present study was to evaluate the toxic effect of Dipel DF, Jojoba and Chlorypyrifos in addition to untreated check control against.S. littoralis

show abstract

“…Also, they reported that the percentages of deformed pupae and malformed adults were the highest with pyridalyl application (10.8 and 22.0%) comparing to spinosad application (2.2 and 3.3%), respectively. Osman and Mahmoud (2009) found that spinosad at its recommended rate against 3 rd instar larvae of S. littoralis susceptible strain resulted in 33.3% pupation, 13.3% adult emergence and 6.6% malformed adults. CONCLUSION…”

Section: Latent Effects Of the Tested Insecticides On S Littoralismentioning

confidence: 97%

Field Persistence of Some Novel Insecticides Residues on Cotton Plants and Their Latent Effects against Spodoptera littoralis (Boisduval)

El-Zahi

2013

Alexandria Science Exchange Journal: An International Quarterly

View full text Add to dashboard Cite

New insecticides that exhibited high compatibility with environment components are very promising substitutes for control of the economic insects. Simi-field experiments were conducted on profenofos and four novel insecticides viz., spinosad, emamectin-benzoate, pyridalyl and indoxacarb to investigate their efficiency and the field persistence of their residues against 4 th instar larvae of the cotton leaf worm, Spodoptera littoralis (Boisd.), field strain via determination of Lt 50 values. The recommended rates of these insecticides were sprayed on the foliage of cotton plants, var. Giza 86, in the field. Also, latent effects after feeding of larvae on sprayed leaves for 24 h were studied under laboratory conditions. Pyridalyl and emamectinbenzoate had significantly the most persistent residual activity with Lt 50 values of 6.74 and 5.51days, respectively. Whereas, indoxacarb, spinosad and profenofos displayed inferior persistence periods translated in Lt 50 values of 0.72, 1.33 and 1.55 days, respectively. The high efficiency of pyridalyl and emamectin-benzoate decreased gradually after spray causing 100, 100, 95, 87, and 72% larval mortality for pyridalyl and 100, 92, 88, 66, and 41% larval mortality for emamectin-benzoate after 0, 1, 2, 4, and 6 days of spray, respectively. Two days post spray, the toxic effect of profenofos declined sharply recording 94, 60, 45, 30, and 10% larval mortality after 0, 1, 2, 4, and 6 days of application, respectively. As the time after spray extended, the latent effects of the tested insecticides on survived larvae and consequent stages significantly decreased. Pyridalyl and emamectin-benzoate resulted in the superior latent effects even at the 6 th day of spray; causing larval duration of 20.1 & 19.6 days, 20.4 & 42.6% normal pupae and 26.7 & 55.2% normal adult emergence, respectively comparing to the other treatments. These results indicated that novel insecticides had the potentiality to be promising substitutes of conventional toxicants for S. littoralis control under field conditions.

show abstract

Effects of Bio-Rational Insecticides on Selected Biological Aspects of the Egyptian Cotton Leafworm Spodoptera Littoralis (Boisd.) (Lepidoptera: Noctuidae)

Cited by 12 publications

References 9 publications

Efficacy of eco-smart insecticides against certain biological stages of jasmine moth, Palpita unionalis Hb. (Lepidoptera: Pyralidae)

Efficacy of eco-smart insecticides against certain biological stages of jasmine moth, Palpita unionalis Hb. (Lepidoptera: Pyralidae)

Comparative Effect of Some Bio Insecticides with Chlorpyrifos on Cotton Leafworm

Field Persistence of Some Novel Insecticides Residues on Cotton Plants and Their Latent Effects against Spodoptera littoralis (Boisduval)

Contact Info

Product

Resources

About