Physicochemical and biological properties of nanochitin—abamectin conjugate for Noctuidae insect pest control

Li, Zhen‐Ya; Su, Lihe; Wang, Hezhong; An, Shiheng; X, Yin

doi:10.1007/s11051-020-05015-1

Cited by 10 publications

(7 citation statements)

References 88 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It has been reported that α-chitin nanocrystals from shrimp shells exhibited exceptionally high surface area near 350 m 2 /g [ 35 ], giving a great opportunity to associate with chemical pesticide. The results in this study also make a great agreement with previous reports [ 2 , 43 , 44 ]. Moreover, an interesting phenomenon was observed during feeding with NCs (Additional file 1 : Fig S1).…”

Section: Resultssupporting

confidence: 93%

“…4 that, after 12 h treatment, the corrected mortality of aphids treated with 50 mg/L of nanochitin alone and its mixtures with dilutions of chemical pesticides reached 80% or above, meaning that most of treated aphids dead. In our previous study, we found that NCs significantly promoted abamectin (Am) water dispersity, thermal stability, and photostability, effectively reduced Am dosage in insect pest control [ 43 ]. Am is a biogenic pesticide derived from the bacterium Streptomyces avermitilis.…”

Section: Resultsmentioning

confidence: 99%

“…In our previous study, nanochitin mixed with Imidacloprid 10% WP showed a significant control efficiency in wheat aphid [ 44 ]. We recently reported that nanochitin conjugated with abamectin, a biopesticide for insect pests control, had a great ability to control larva growth, enhancing mortality against 2 instar larvae of noctuid, and effectively reducing pesticides dosage by 50% [ 43 ]. However, the insecticidal activity and toxicity of NC has not been systemically explored at present.…”

Section: Introductionmentioning

confidence: 99%

“…The nanochitin whisker possesses strong biological activities, low toxicity in plant protection application [32,[40][41][42][43][44]. It has been reported that nanochitin particle surpasses reported biobased nanoparticles such as nanocellulose, alginate, and glucan.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Nanochitin whisker enhances insecticidal activity of chemical pesticide for pest insect control and toxicity

Wang

et al. 2021

J Nanobiotechnol

Self Cite

View full text Add to dashboard Cite

Background Nanomaterials in plant protection promise many benefits over conventional pesticide products. Nano-enabled pesticides may alter the functionality or risk profile of active ingredients. Cationic nanochitin whiskers (NC) possess strong biological activity against wheat aphids. However, toxicity and synergistic effects of NC with chemical pesticides against pest insects has not been systemically reported. This study investigated the insecticidal enhancement by NC with Omethoate (40% EC), Imidacloprid (10% WP), and Acetamiprid (40% WG) for pest control using wheat aphid as piercing-sucking mouthparts insect. Fluorescein isothiocyanate labelled NC was used to monitor the uptake and transportation pathway of NC inside the target insects. Toxicity of NC was tested with Sprague-Dawley (SD) rat. Our findings provide a theoretical basis for future application of NC in plant protection against pest insects. Results NCs synthesized by acidic hydrolysis were rod-like nanoparticles in a range of 50–150 nm in length and 30–50 nm in width, which examined by electron microscopy and dynamic light scattering methods. The charge density and zeta potential were about 63 mmol/kg and + 36.4 mV, respectively. By absorption and/or contact action of 30–50 mg/L of NC suspension, the corrected mortality of wheat aphids reached up to 80% or above after 12 h treatment, NC could be distributed through digestive system and relocated from mouth to other tissues inside the insect body. When associated with dilutions of conventional pesticides, the corrected mortality were significantly increased up to 95% or above. The dosage of the chemical pesticide and nanochitin in the mixtures (1:1 by volume) were all reduced to half. The acute oral toxicity Lethal Dose 50% (LD50) to SD rat is greater than 5000 mg/kg BW (body weight) in male and female, acute dermal toxicity LD50 is greater than 2000 mg/kg BW of NC. Conclusions NC has a strong promotive effect on insecticidal effectiveness of chemical insecticides. It was easily absorbed by plant, transported and distributed from mouth to other tissues of the insects while sucking plant fluid. Low acute oral and dermal toxicity to SD rat indicated that it is safe to apply in agriculture and food industry. NCs has a great potential for water-based nanopesticide formulation to reduce chemical pesticide use for future agro-environmental sustainability.

show abstract

Section: Resultssupporting

confidence: 93%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Nanochitin whisker enhances insecticidal activity of chemical pesticide for pest insect control and toxicity

Wang

et al. 2021

J Nanobiotechnol

Self Cite

View full text Add to dashboard Cite

show abstract

“…Nanochitin can be used as a functional additive or nanofiller, ,− by taking advantage of the inherent chemical, morphological, and biological features of nanochitin, e.g. , surface charge and chemistry, anisotropy, flexibility, fibril dimension, aspect ratio, and nitrogen content. − Hence, nanochitin enables novel material design, for instance, to reinforce different materials, , and as a biomimicry template of periodic structures (ChNC LCP). ,, This takes advantage of the combination of nematic structural properties of ChNC and a reinforcing phase to create advanced materials, showing potential uses in sensing, electrochemical, and optical applications, among others. ,,,, Templating ChNC LCP was used to synthesize silica-based mesoporous nitrogen-doped carbon films in a layered nematic organization (Figure a) .…”

Section: Applications Of Nanochitin In Multidimensional Materialsmentioning

confidence: 99%