Desenvolvimento e mortalidade larval de Spodoptera frugiperda em folhas de milho tratadas com extrato aquoso de folhas de Azadirachta indica

Viana, P. A.; Prates, H. T.

doi:10.1590/s0006-87052003000100009

Cited by 34 publications

(26 citation statements)

References 15 publications

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“…This might be because their seeds are very oily, originating an equally oily extract and this oil could act as an adjuvant, improving the fixation and distribution of the S. saponaria aqueous extract in the maize leaves offered as food for the caterpillars, promoting an increase in the insecticide action. Viana and Prates (2003) observed the same results in a field study, where they tested aqueous extracts (10% w/v) of A. indica leaves, with and without the addition of soy oil, against S. frugiperda caterpillars and the mortality was 45.6% for the aqueous extract A. indica and 71.7% for the aqueous extract A. indica + soy oil. In the anti-trypsin assays the results showed that the aqueous extract of T. esculenta did not inhibit the activity of the bovine trypsin enzyme.…”

Section: Discussionsupporting

confidence: 58%

Effect of the aqueous extracts of the seeds of Talisia esculenta and Sapindus saponaria on fall armyworm

Santos

Freire

Bogorni³

et al. 2008

Braz. arch. biol. technol.

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Section: Discussionsupporting

confidence: 58%

Effect of the aqueous extracts of the seeds of Talisia esculenta and Sapindus saponaria on fall armyworm

Santos

Freire

Bogorni³

et al. 2008

Braz. arch. biol. technol.

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“…For the preparation of aqueous extract, neem leave dust was soaked in distilled water for 24 h at room temperature at dark as described by Viana and Prates (2003). The preparations of different concentrations were filtered and stored in amber glass bottles at 4°C.…”

Section: Preparation Of Aqueous Extract From Neem Leaf Dustmentioning

confidence: 99%

Effect of aqueous extract of Azadirachta indica A. Juss (neem) leaf on oocyte maturation, oviposition, reproductive potentials and embryonic development of a freshwater fish ectoparasite Argulus bengalensis Ramakrishna, 1951 (Crustacea: Branchiura)

2014

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In present study, a microcosm experiment is carried out to investigate the efficacy of 120 and 250-ppm crude aqueous extract of Azadirachta leaf on oocyte maturation, oviposition, embryonic development and hatching of the eggs of a fish ectoparasite Argulus bengalensis. Relative abundance of different maturing oocyte stages in the ovary of the parasite from different age groups was enumerated, and marked variations were obtained. Significant depletion in the abundance of pre-vitollogenic, vitellogenic and post-vitellogenic oocytes was recorded, which indicates impairment in maturation. Chromatin condensation of the oocytes of treated parasite indicates apoptosis of oogenic cells. Strong oviposition deterrence was evident by the elevated oviposition deterrence index of 0.18 and 0.52 at respective toxin levels. The treated parasites invested less number of eggs per oviposition, and hatching percentage of the eggs reduced markedly. In vitro treatment of eggs within 70 min of incubation exhibited coagulation of yolk material and subsequent reduction in hatching percentage. However, treatment applied after this critical period, hatching was not significantly altered. In vitro treatment of eggs at 80 min of incubation resulted in normal development. It signifies that azadirachtin affects the early developmental events but not the later. Presumably, azadirachtin either affects early gene expression of the embryo or antagonizes any of the substances of the zygote required for sustaining early developmental process. The result of the present experiment suggests that azadirachtin could be a promising agent to control argulosis through inhibition of the reproductive maturity of the parasite as well as through interference of its embryonic development.

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“…To control S. frugiperda, the efficiency of leaf extract and branches of Trichilia pallida Sw (Meliaceae) in ethyl acetate (ROEL et al, 2000) and aqueous extract of leaves of nim (Azadirachta (SOUZA et al, 2010;ZHANG et al, 2014), of some species of the genus Piper spp. (SCOTT et al, 2008) and Lippia alba (Mill.)…”

Section: Introductionmentioning

confidence: 99%

Insecticidal activity of essential oils in controlling fall armyworm, Spodoptera frugiperda

et al. 2019

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Fall armyworm, Spodoptera frugiperda (Smith) (Lepidoptera: Noctuidae) is one of the main pests in maize crop with developing resistance to chemical products and Bt technology. Therefore, alternative control methods such as essential oils are important steps in the implementation management strategies for this pest. This study aimed to evaluate the efficiency of essential oils (EOs) of Corymbia citriodora, Myrciaria dubia (Myrtaceae), Lippia microphylla (Verbenaceae) and Piper umbelattum (Piperaceae) in controlling S. frugiperda. The OEs were extracted and mortality tests were conducted with topic and volatile applications, in 30 second-instar caterpillars originated from insect rearing and artificial diet. As a control, we conducted tests with distilled water and acetone. EOs that provided mortality rates above 80% were submitted to chemical analysis for constituent identification. The efficient EOs were only those of C. citriodora and L. microphylla. For EO of C. citriodora, the LD80 was 7.06 ± 0.73 mg.g -1 in topical application and 5.85 ± 0.75 μL via volatile application. On the other hand, for EO of L. microphylla, DL80 was 9.95 ± 1.25 mg.g -1 in topical application and 18.56 ± 3.55 μL via volatile application. Chemical analysis showed that the main constituents were citronella for the EO of C. citriodora and (E)-caryophyllene and (E)-nerolidol to the EO of L. microphylla. EOs of C. citriodora and L. microphylla are promising for controlling S. frugiperda, with emphasis on the volatile effect of C. citriodora oil.

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Desenvolvimento e mortalidade larval de Spodoptera frugiperda em folhas de milho tratadas com extrato aquoso de folhas de Azadirachta indica

Cited by 34 publications

References 15 publications

Effect of the aqueous extracts of the seeds of Talisia esculenta and Sapindus saponaria on fall armyworm

Effect of the aqueous extracts of the seeds of Talisia esculenta and Sapindus saponaria on fall armyworm

Effect of aqueous extract of Azadirachta indica A. Juss (neem) leaf on oocyte maturation, oviposition, reproductive potentials and embryonic development of a freshwater fish ectoparasite Argulus bengalensis Ramakrishna, 1951 (Crustacea: Branchiura)

Insecticidal activity of essential oils in controlling fall armyworm, Spodoptera frugiperda

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