Insect Hormones and Insect Chemical Ecology

Morgan, E. David; Wilson, Ian D.

doi:10.1016/b978-0-08-091283-7.00053-9

Cited by 31 publications

(34 citation statements)

References 427 publications

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“…In turn, plants have developed an efficient defense mechanism, in which polysaccharides and secondary metabolites provide chemical barriers against animal and microbial predators (Wedge and Camper, 2000). A large number of plant products have shown their biological activity of different types (Grainge and Ahmed, 1988;Morgan and Wilson, 1999), either in their natural forms or in their conjugated forms (glycosides, glycoproteins, etc.) which enable easier transportation of these natural products in plant organisms (McMurry and Begley, 2005).…”

Section: Introductionmentioning

confidence: 99%

Can juvenogens, biochemically targeted hormonogen compounds, assist in environmentally safe insect pest management?

Wimmer

Kuldová

Bennettová

2006

Insect Biochemistry and Molecular Biology

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Section: Introductionmentioning

confidence: 99%

Can juvenogens, biochemically targeted hormonogen compounds, assist in environmentally safe insect pest management?

Wimmer

Kuldová

Bennettová

2006

Insect Biochemistry and Molecular Biology

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“…3 , 4 Since then, the structures of JHs ( 2 − 6 ) have been reported. 1 , 5 Heteroptera is a major insect group and includes ca. 40 000 species.…”

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confidence: 99%

Structure Determination of a New Juvenile Hormone from a Heteropteran Insect

et al. 2009

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The structure of the juvenile hormone (JH) in the suborder Heteroptera, order Hemiptera, has been known for a very long time to be different from the JH of other orders, but the structure has been a matter of controversy. The structure was first elucidated by an unprecedented approach involving the screening of a JH molecular library. The novel Heteroptera-specific JH (JHSB3) is a new category of JH that is featured by the skipped bisepoxide structure.

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“…Neem tree (Azadirachta indica A. Juss) is an important source of secondary metabolites in nature and over 300 bioactive secondary compounds have been isolated including limonoids, phenolics, carotenoids, steroids, ketones, and enzymes (Kumar et al, 1996;Morgan and Wilson, 1999). Limonoids (tetranotriterpenoids) are the major group of secondary compounds such as azadirachtin, nimbin, nimbidin, salannin, etc (Jones et al, 1989;Govidachari et al, 1995).…”

Section: Introductionmentioning

confidence: 99%

Efficacy of neem (Azadirachta indica A. Juss) callus and cells suspension extracts against three lepidopteron insects of cotton

Rafiq¹,

Dahot²,

Naqvi³

et al. 2012

J. Med. Plants Res.

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The efficacy of various preparations of neem (Azadirachta indica A. Juss) (NCE1) and cells suspension extracts (NCE2) was evaluated against three cotton insects including pink bollworm (Pectinophora gossypiella), bollworm (Helicoverpa armigera) and leafworm (Spodoptera litura). The cotton leaves and medium size excised bolls were sprayed with different dilutions of NCE1 and NCE2 and 3rd instar larvae were incubated. The dilutions T1 (1:10 v/v Extract: D.H 2 O) and T2 (1:100 v/v Extract: D.H 2 O) of both NCE1 and NCE2 showed highly significant results as almost 100% mortality was recorded after 2 to 3 days hours of larvae incubation. The larvae showed a repellent behavior, decrease in weight, and negligible leaf area damage. The preparation T3 (1:1000 v/v Extract: D.H 2 O) showed 76 to 84% mortality, T4 (1:10000 v/v Extract: D.H 2 O) 28 to 72%, and T5 (1:10000 v/v Extract: D.H 2 O) 12 to 40% mortality after the 5th day of incubation. The larvae also showed repellent to non repellent behavior, slow to moderate feeding activity with gradual increase of leaf area damage as extract preparations were diluted from T1 to T3. The control showed 96 to 100% survival of all the three insect species with active feeding activity, increase in insect weight and more than 50% leaf area damage after 2nd day of incubation. In conclusion, the extracts of callus and cell suspensions of neem have insecticidal potential that showed significant mortality response against three bioassayed insects.

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Insect Hormones and Insect Chemical Ecology

Cited by 31 publications

References 427 publications

Can juvenogens, biochemically targeted hormonogen compounds, assist in environmentally safe insect pest management?

Can juvenogens, biochemically targeted hormonogen compounds, assist in environmentally safe insect pest management?

Structure Determination of a New Juvenile Hormone from a Heteropteran Insect

Efficacy of neem (Azadirachta indica A. Juss) callus and cells suspension extracts against three lepidopteron insects of cotton

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