Boric Acid and Inorganic Borate Pesticides

Bernard, C. E.; Harrass, Michael C.; Manning, Mark J.

doi:10.1016/b978-0-12-374367-1.00094-x

Cited by 8 publications

(4 citation statements)

References 108 publications

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“…The weak acid characteristic of (NH4)2SO4 and NaH2PO4 and the weak base characteristic of Na2CO3 and NaHCO3 may be responsible for the larvicidal activities of these inorganic salts; because no mortality of Anopheles stephensi and Culex quinquefasciatus larvae was observed with the neutral inorganic salts sodium chloride (NaCl) and sodium phosphate (Na3PO4) aqueous solutions, even at doses 10 times higher than those tested for the weak acid and weak base inorganic salts (data no shown). Previous studies found that inorganic salts have very interesting antimicrobial [28,29], fungicide (especially Na2CO3 and NaHCO3) [30,31] and insecticide properties [32]. Darriet et al [33] also found that mineral and organic compounds have an impact on the development of larvae because the NPK fertilizer placed in water killed all the Aedes Aegypti larvae before pupation.…”

Section: Discussionmentioning

confidence: 98%

Larvicidal Activity of Inorganic Salts Against Anopheles Stephensi and Culex Quinquefasciatus

et al. 2020

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Mosquitoes transmit serious human diseases, causing millions of deaths worldwide every year and the development of resistance to chemical insecticides resulting in rebounding vectorial capacity. In this study, the larvicidal bioassays for activities of aqueous solutions of weak acid [(NH4)2SO4 and NaH2PO4] and weak base (Na2CO3 and NaHCO3) inorganic salts against late instar larvae of disease vectors Anopheles stephensi and Culex quinquefasciatus were carried out under laboratory settings. The four inorganic salts showed varied levels of larvicidal activities after 24 h-exposure on Anopheles stephensi and Culex quinquefasciatus larvae in a dose-dependent fashion. However, the larvicidal activities were relatively higher in Na2CO3 (LC50 = 3162 and 447 ppm) and NaHCO3 (LC50 = 5623 and 398 ppm) solutions as compared to those in (NH4)2SO4 (LC50 = 7943 and 1995 ppm) and NaH2PO4 (LC50 = 7943 and 7120 ppm). The present study showed that the inorganic salts Na2CO3, NaHCO3, (NH4)2SO4 and NaH2PO4 could serve as potential larviciding agents considering their low toxicity. Therefore, this study provides a first report on the larvicidal activity of the inorganic salts on mosquito larvae of disease vectors.

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Section: Discussionmentioning

confidence: 98%

Larvicidal Activity of Inorganic Salts Against Anopheles Stephensi and Culex Quinquefasciatus

et al. 2020

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“…Boron is an essential plant micronutrient, usually taken up by the roots, although it can also be applied as seed treatments or foliar sprays [44,45] However, in excess, boron causes toxicity to the plants, so an appropriate dosage is critical [44,45]. Borax or sodium tetraborate (Na 2 B 4 O 7 ) can be used as a fertiliser [46], but is also known as a pesticide, for example, against insect pests [47]. It has previously been reported to induce local as well as systemic resistance in rice against Pyricularia oryzae in Vietnam in greenhouse as well as in field trials [48,49].…”

Section: Introductionmentioning

confidence: 99%

Sodium Tetraborate Induces Systemic Resistance in Watermelon against Stagonosporopsis cucurbitacearum

Nga,

de Neergaard,

Shetty

et al. 2024

Agronomy

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Imbibing watermelon seeds in 1 mM sodium tetraborate (Na2B4O7) for 24 h systemically protected plants against foliar infection by Stagonosporopsis cucurbitacearum in detached leaves and under greenhouse conditions. The treatment resulted in both a reduction in the overall percentage of leaf infection as well as in the size of lesions. Studies of the mechanisms by which Na2B4O7 protected watermelon showed that there was no direct effect on the S. cucurbitacearum mycelium growth in vitro. On the other hand, plants raised from seeds primed with Na2B4O7 showed a higher frequency of fluorescent epidermal cells compared to the plants treated with water. This indicates that a higher number of cells expressed the hypersensitive response after Na2B4O7 priming. In addition, there was an increase in peroxidase activity and an enhanced accumulation of a 45 kDa acidic peroxidase isoform during the early stages of infection in plants treated with Na2B4O7 compared to plants treated with water and this was positively correlated to the reduction of leaf infection caused by the pathogen. These results indicate that Na2B4O7 is able to induce systemic resistance in watermelon against S. cucurbitacearum by activating the hypersensitive reaction at penetration sites, increasing peroxidase activity and altering the peroxidase isozyme profile. Although each individual response may only have had a minor effect, their combined effects had a reducing effect on the disease.

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“…Another mineral that is involved in this study, sodium tetraborate decahydrate (borax), is naturally occurring and widely used in pesticides. However, as can be inferred from this application, it is not inert [ 12 ], and thus only low concentrations are considered. Its capabilities to promote crosslinking between polysaccharide chains may help attain an airtight layer [ 13 ].…”

Section: Introductionmentioning

confidence: 99%

Improving the Barrier Properties of Paper to Moisture, Air, and Grease with Nanocellulose-Based Coating Suspensions

et al. 2022

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Food packaging manufacturers often resort to lamination, typically with materials which are neither non-biodegradable nor biobased polymers, to confer barrier properties to paper and cardboard. The present work considers a greener solution: enhancing paper’s resistance to moisture, grease, and air by aqueous coating suspensions. For hydrophobization, a combined approach between nanocellulose and common esterifying agents was considered, but the water vapor transmission rate (WVTR) remained excessively high for the goal of wrapping moisture-sensitive products (>600 g m−2 d−1). Nonetheless, oil-repellant surfaces were effectively obtained with nanocellulose, illite, sodium alginate, and/or poly(vinyl alcohol) (PVA), reaching Kit ratings up to 11. Regarding air resistance, mineral-rich coatings attained values above 1000 Gurley s. In light of these results, nanocellulose, minerals, PVA, pullulan, alginate, and a non-ionic surfactant were combined for multi-purpose coating formulations. It is hypothesized that these materials decrease porosity while complementing each other’s flaws, e.g., PVA succeeds at decreasing porosity but has low dimensional stability. As an example, a suspension mostly constituted by nanocellulose, sizing agents, minerals and PVA yielded a WVTR of roughly 100 g m−2 d−1, a Kit rating of 12, and an air resistance above 300 s/100 mL. This indicates that multi-purpose coatings can be satisfactorily incorporated into paper structures for food packaging applications, although not as the food contact layer.

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Boric Acid and Inorganic Borate Pesticides

Cited by 8 publications

References 108 publications

Larvicidal Activity of Inorganic Salts Against Anopheles Stephensi and Culex Quinquefasciatus

Larvicidal Activity of Inorganic Salts Against Anopheles Stephensi and Culex Quinquefasciatus

Sodium Tetraborate Induces Systemic Resistance in Watermelon against Stagonosporopsis cucurbitacearum

Improving the Barrier Properties of Paper to Moisture, Air, and Grease with Nanocellulose-Based Coating Suspensions

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