Ultraviolet protection of nucleopolyhedrovirus through microencapsulation with different polymers

Gifani, Aida; Marzban, Rasoul; Safekordi, Ali Akbar; Ardjmand, Mehdi; Dezianian, Ahmad

doi:10.1080/09583157.2015.1018814

Cited by 16 publications

(8 citation statements)

References 23 publications

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“…Thus, lignin was suitable to stabilize azadirachtin against photodegradation by absorption of UV radiation by the chromophores. Besides, the alginate-derived oligosaccharides have been used as potential UV protector in the areas of functional foods , and biological control …”

Section: Results and Discussionmentioning

confidence: 99%

“…Besides, the alginate-derived oligosaccharides have been used as potential UV protector in the areas of functional foods 35,36 and biological control. 37 Some natural ultraviolet light absorbers such as ferulic acid, gallic acid, aloin, and rutin have been researched as photostabilizers of azadirachtin. These natural products showed a moderate degree of azadirachtin photostabilization with dissipation half-life ranging between 14.41 and 20.21 h. 5 This study demonstrates that the use of natural polymers such as lignin and alginate to encapsulate azadirachtin improve its stability against photodegradation.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

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Preparation and Characterization of Azadirachtin Alginate-Biosorbent Based Formulations: Water Release Kinetics and Photodegradation Study

Flores‐Céspedes

Martínez-Domínguez

Villafranca‐Sánchez

et al. 2015

J. Agric. Food Chem.

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The botanical insecticide azadirachtin was incorporated in alginate-based granules to obtain controlled release formulations (CRFs). The basic formulation [sodium alginate (1.47%) - azadirachtin (0.28%) - water] was modified by the addition of biosorbents, obtaining homogeneous hybrid hydrogels with high azadirachtin entrapment efficiency. The effect on azadirachtin release rate caused by the incorporation of biosorbents such as lignin, humic acid, and olive pomace in alginate formulation was studied by immersion of the granules in water under static conditions. The addition of the biosorbents to the basic alginate formulation reduces the rate of release because the lignin-based formulation produces a slower release. Photodegradation experiments showed the potential of the prepared formulations in protecting azadirachtin against simulated sunlight, thus improving its stability. The results showed that formulation prepared with lignin provided extended protection. Therefore, this study provides a new procedure to encapsulate the botanical insecticide azadirachtin, improving its delivery and photostability.

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Section: Results and Discussionmentioning

confidence: 99%

Section: ■ Results and Discussionmentioning

confidence: 99%

Preparation and Characterization of Azadirachtin Alginate-Biosorbent Based Formulations: Water Release Kinetics and Photodegradation Study

Flores‐Céspedes

Martínez-Domínguez

Villafranca‐Sánchez

et al. 2015

J. Agric. Food Chem.

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“…The most recent research on additives to increase the virus persistence under ultraviolet A (UV-A) has been done by using microencapsulation polymer methods of starch (3%), gelatine (3-5%), sodium alginate (3%) against another lepidopteran pest, the cotton bollworm (Helicoverpa armigera). It was reported that gelatine (5%) provides high protection up to 93.3% after being exposed under UV-A for 72 h, while starch (3%) has shown only a protection of 3.7% (Gifani et al, 2015).…”

Section: Evaluation Of Splimnpv Persistence With Natural Uv Protectants Against the 1 St And 2 Nd Larval Instars Of S Exigua Under Field mentioning

confidence: 99%

The Efficacy and Persistence of Spodoptera littoralis Nucleopolyhedrovirus (SpliMNPV) Applied in UV Protectants against the Beet Armyworm, Spodoptera exigua (Hubner) (Lepidoptera: Noctuidae) under Saudi Field Conditions

Sukirno¹,

Tufail²,

Rasool³

et al. 2018

PJZ

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“…Solar radiation is the major factor affecting field persistence of baculoviruses with mean half-life generally ranging from 2 to 5 days (Moscardi et al, 2011;Jeyarani et al, 2013). Several studies reported the use of microencapsulation (Gifani et al, 2015) and UV protectants to prevent baculovirus inactivation such as reflectants (Wu et al, 2015), optical brighteners (Bernal et al, 2014), natural additives (Sutanto et al, 2017), and other general and selective absorbents, and chromophores (Beas-Catena et al, 2014). Temperature is another factor that can also affect the success of applied viruses by increasing the lethal time in regions with low mean temperatures, and by inhibiting the infection at low or high temperatures (Moscardi et al, 2011).…”

Section: Redução Da Eficiência Do Nucleopoliedrovirus Contra Chrysodementioning

confidence: 99%

EFFECTIVENESS REDUCTION OF NUCLEOPOLYHEDROVIRUS AGAINST Chrysodeixis includens DAYS AFTER APPLICATION IN SOYBEAN PLANTS

Botelho¹,

Silva

Ávila

2018

Rev. Agric. Neotrop.

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The use of nucleopolyhedroviruses (NPVs) can provide an effective and environmentally benign alternative to synthetic chemicals. The efficacy and persistence of their occlusion bodies may be affected by several factors. The present study investigated the efficacy of isolate Chin-IA (I-A) (ChinSNPV) on third-instar Chrysodeixis includens larvae after 10 days of its application in soybean plants under semi-field conditions. Two concentrations of virus (2x10 11 and 10x10 11 PIB ha-1) and water (control treatment) were applied in soybean plants. Leaves were collected 0, 2, 4, 6, 8 and 10 days after application of treatments, and then used as disc format to feed the soybean looper larvae in the lab. It was considered a split plot scheme with a randomized complete block design (three treatments and eight repetitions) and the mortality data adjusted to a regression equation using the exponential decay model. In the day of application, the lowest and highest virus concentration caused 87.5 and 100% of mortality of larvae, respectively. However, their efficiency was reduced, on average, 70% after four days of the application. Among the factors may have compromised the persistence and activity of the isolate studied, the time after its application and ultraviolet radiation may have had a strong influence on this results. Its notable the potential use of ChinSNPV in programs for the management of this pest in soybean. Similarly, the properly application of this virus at sundown will ensure its efficiency for an extended period.

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Ultraviolet protection of nucleopolyhedrovirus through microencapsulation with different polymers

Cited by 16 publications

References 23 publications

Preparation and Characterization of Azadirachtin Alginate-Biosorbent Based Formulations: Water Release Kinetics and Photodegradation Study

Preparation and Characterization of Azadirachtin Alginate-Biosorbent Based Formulations: Water Release Kinetics and Photodegradation Study

The Efficacy and Persistence of Spodoptera littoralis Nucleopolyhedrovirus (SpliMNPV) Applied in UV Protectants against the Beet Armyworm, Spodoptera exigua (Hubner) (Lepidoptera: Noctuidae) under Saudi Field Conditions

EFFECTIVENESS REDUCTION OF NUCLEOPOLYHEDROVIRUS AGAINST Chrysodeixis includens DAYS AFTER APPLICATION IN SOYBEAN PLANTS

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