Insect antifeeding azulene derivative from the brown alga Dictyota dichotoma

Saleh, Mahmoud A.; Abdel-Moein, Nadia M.; Ibrahim, N. A.

doi:10.1021/jf00126a054

Cited by 13 publications

(4 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…al 2007). Some of fractions derived from the algal extracts and after its purification and chemical characterization showed that they were either hydrocarbons or fatty acids (Sarkar et al, 1995) or some algae, such chlamydomonas and chorella spp liberate essential peptides and amino acids with different magnitude (Allen, 1956) ,sometimes some antimicrobial substances was found in green algae Chlorella and Scenedesmus (Saleh et al, 1984 andEl-Baz et al ,1985). Cyanobacteria produce numerous secondary metabolites exhibiting diverse bioactivities (Burja et al, 2001;Wiegand and Pflugmacher, 2005).…”

Section: Introductionmentioning

confidence: 99%

Comparative Toxic Activity of Four Algae, Against the 2nd and 4th Larval Instars of Black Cutworm, Agrotis Ipsilon (Hufnagel)

Abdel-Rahim

Mohamed

2013

Egyptian Journal of Agricultural Research

View full text Add to dashboard Cite

The dry biomass of four cyanobacterial microalgal strains Anabaena flos aquae, Anabanea laxa, Anabanea fertilissima and Nostoc muscorum was evaluated in invitro assay as a biopesticides against 2 nd and 4 th instars of Agrotis ipsilon. Larvae were fed on leaf discs painted with the algal solution for 24h. The 2 nd instar larvae were more susceptible than the 4 th ones to the four tested algal treatments. N. muscorum treatment was the most toxic one against the 2 nd and 4 th larval instars. Where, its LC 50 values were 45 and 150 mg/ml, respectively while, A. fertilissima was the least one, its LC 50 values were 250 and 660 mg/ ml, respectively. All the treated larvae were susceptible to four tested algal treatments and its resistance varied according to the larval instars and tested alga. Marked decrease in pupation for both 2 nd and /or 4 th instar by the four algal treatments, whereas, the 2 nd instar treated with N. muscorum alga exhibited the most suppressive decrease to 44%, as compared to control (97%). Significant reduction for pupal weight, where, 4 th instar treated with A. flos aquae alga recorded the highest pupal weight decrease to average 290mg, as compared to 484mg of control. Besides prolonging pupal duration where, treatment for both instar with A. flos aquae and A. laxa algae induced the longest period and increased the pupal malformation percent where, 4 th instar treated with N. muscorum and A. flos aquae algae induced noticeable percent reached to21.3 and20% and increased adult malformation to30 and20% respectively, as respect to control. However, the larval treatment of 2 nd instar with N. muscorum and A. fertilissima algae had the strongest effect in larval duration increase to average25 and 25.8day as compared to20.4day of control. In addition, the larval treatment of 4 th instar with the four algae decreased the adult fecundity and fertility. Moreover, N. muscorum and A. flos aquae algae inhibited the adult fecundity and eggs fertility to zero, as compared to505eggs/female of control. Marked declining of adult longevity with N. muscorum, A. flos aquae and A.laxa to average 7day, as compared to11day of control. Also, the treatment with the three algae disorder the sex ratio of males and females, as compared to that of control. While the larval treatment with A. fertilissima alga didn't affect the pupal malformation, eggs fertility, adult longevity and sex ratio.

show abstract

Section: Introductionmentioning

confidence: 99%

Comparative Toxic Activity of Four Algae, Against the 2nd and 4th Larval Instars of Black Cutworm, Agrotis Ipsilon (Hufnagel)

Abdel-Rahim

Mohamed

2013

Egyptian Journal of Agricultural Research

View full text Add to dashboard Cite

show abstract

“…These compounds called secondary plant metabolites that play a vital role in plant defense against insects and pathogens via toxicity and repellency effects (Karban& Chen, 2007,Eldoksch& El-Sebae,2009. Many essential oils and their active constituents have been reported to exhibit various antifungal, antibacterial, insecticidal and insect antifeeding properties (Saleh et al,1984;El-Sebae, 1987;Isman, 2000;Choi et al,2004;Eldoksch& El-Sebae,2005;. The two-spotted spider mite, TetranychusurticaeKoch (Acari: Tetranychidae), is one of the most serious pests of vegetables, fruits and ornamental plants in Egypt and worldwide (Eldoksch et al, 1991;Hosny et al,2003).…”

Section: Introductionmentioning

confidence: 99%

Fumigant Toxic Action and Repellent Effects of Plant Essential Oils against Two Spotted Spider Mite Tetranychus urticae koch (Acari: Tetranychidae)

2012

Alexandria Science Exchange Journal: An International Quarterly

View full text Add to dashboard Cite

Three plant essential oils extracted by hydrodistillation from three medicinal plants namely,clove, Eugenia caryophyllata (Myrtaceae),basil, Ocimumbasilicum and peppermint, Menthapiperita (Lamiaceae) were tested for their fumigant toxic action and repellency effects against adults of the two spotted spider mite, Tetranychusurticae. A filter paper diffusion bioassay without allowing direct contract and dipping method respectively was used. Responses varied according to oil type and dose.In a petri dish 90x10mm as a test chamber at the high dose 200 µl /L air , clove oil gave 100% mortality after 24h of exposure against adult T.urticaewhereas 87.5 and 85.1% mortality were obtained with basil and peppermint oils respectively. The LC 50 values of essential oils of clove, basil, andpeppermint against adult T. urticae were 32.2, 66.7 and 62.5 µl/L air, respectively. This indicates that the vapors of essential oil of clove exhibited the highest toxic effect on mites whereas basil and peppermintshowed relatively the least toxic action. Essential oils of clove, basil, and peppermint proven to have repellent effects with ED 50 s of 1.63, 3.43 and 4.88% respectively.The presentresults show that essential oils of the tested plants have the potential to be used in integrated pest management programs as safer alternative to conventional acaricides to control T.urticae on economic plants in commercial agriculture.

show abstract

“…An emerging alternative to random chemical synthesis is the study and exploitation of naturally occurring products with pesticidal activities to identify such leading molecules (Pillmoor et al, 1993 andBrent, 1996). Research on natural products and essential oils derived from plants has led to exploring many of biologically active chemicals useful in plant protection mainly against insect pests, weeds and plant pathogenic fungi and bacteria (Saleh et al, 1984;Bowers, 1985;Duke, 1986;El-Sebae, 1987;Bentley et al, 1988;Eldoksch et al, 1996;Eldoksch et al, 2001 andEl-Sebae, 2005). The present study was conducted to investigate the acaricidal activity of certain plant extracts and oils and some of their major components against the twospotted spider mite, Tetranychus urticae (Koch) under laboratory conditions which could enable a determination of the necessary structures for their acaricidal action and to predict the possible structureactivity relationships.…”

Section: Introductionmentioning

confidence: 99%

Acaricidal Activity of Plant Extracts and Their Main Terpenoids on The Two- Spotted Spider Mite Tetranychus Urticae (Acari: Tetranychidae)

2009

Alexandria Science Exchange Journal: An International Quarterly

View full text Add to dashboard Cite

The acaricidal activity of certain natural plant extracts and some of their main terpenoids was evaluated against the female adults of the two-spotted spider mite, Tetranychus urticae (Koch) under laboratory conditions using the slide dip and surface residue techniques. The relationship between chemical structure of terpenes and acaricidal efficacy was evaluated. The results revealed that peppermint, thyme, caraway and clove extracts were the most effective against the spider mite, followed by chenopodium and visnaga extracts and then eucalyptus and sweet basil which showed relatively the least miticidal activity. Of the terpenoids tested, the monoterpene hydrocarbons limonene and ocimene were completely ineffective on the mite at all concentrations tested, whereas, the oxygenated terpene alcohols menthol and linalool exhibited promising acaricidal activity. The phenolic compound thymol was the most active among tested terpenoids followed by carvone, a monocyclic ketone and the main constituent of caraway oil and proved to be biologically more active against mites than camphor (the bicyclic monoterpene ketone).Visnagin, a furanochromone with one methoxy group, was significantly more toxic against adult spider mite than khellin which has two methoxy groups. The results obtained suggest that certain terpenoids of plant origin can be used as potential parent structures for new acaricides and as alternative and safe acaricidal agents.

show abstract

Insect antifeeding azulene derivative from the brown alga Dictyota dichotoma

Cited by 13 publications

References 3 publications

Comparative Toxic Activity of Four Algae, Against the 2nd and 4th Larval Instars of Black Cutworm, Agrotis Ipsilon (Hufnagel)

Comparative Toxic Activity of Four Algae, Against the 2nd and 4th Larval Instars of Black Cutworm, Agrotis Ipsilon (Hufnagel)

Fumigant Toxic Action and Repellent Effects of Plant Essential Oils against Two Spotted Spider Mite Tetranychus urticae koch (Acari: Tetranychidae)

Acaricidal Activity of Plant Extracts and Their Main Terpenoids on The Two- Spotted Spider Mite Tetranychus Urticae (Acari: Tetranychidae)

Contact Info

Product

Resources

About