Spray deposits: Opportunities for improved efficiency of utilizationvia quality, quantity and formulation

Hall, Franklin R.

doi:10.1007/bf02980330

Cited by 4 publications

(3 citation statements)

References 17 publications

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“…The use of multiple crop protection chemicals is a common practice in fruit production, given the requirements of different markets such as the search for plant health, organoleptic quality, and higher yields. In this context, pesticides are applied to agricultural systems for the purpose of protecting plants from damage due to weeds, insects, or diseases [1]. Then, the term pesticide or agrochemical is used to define a wide range of compounds including insecticides, fungicides, herbicides, rodenticides, molluscicides, nematicides, plant growth regulators, defoliant, and others [2].…”

Section: Introductionmentioning

confidence: 99%

Role of the Formulation in the Efficacy and Dissipation of Agricultural Insecticides

Buzzetti¹

2018

Insecticides - Agriculture and Toxicology

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Considering the implications the formulation may have on the effectiveness and residuality of an active ingredient, four trials were conducted comparing two commercial formulations of the diazinon insecticide, two of acetamiprid, two of lambda-cyhalothrin, and, finally, three formulations of imidacloprid. For diazinon and acetamiprid, the comparison parameters used correspond to efficacy against three key pests in apple trees: Cydia pomonella, Diaspidiotus perniciosus, and Pseudococcus viburni; for l-cyhalothrin, efficacy against C. pomonella was compared; and for imidacloprid, differences in control P. viburni were established. In all cases, their persistence was established in terms of initial and final residue levels in samples of fruits, at 1 and 25 days after application (DAA). Different formulations of the same insecticide correspond to a relevant factor in the general behavior that each product presents in field conditions, being able to affect parameters such as its persistence in the fruit and/or initial deposit of the active ingredient. This variation was demonstrated in the comparison performed on acetamiprid, imidacloprid, and diazinon, but it was not so in l-cyhalothrin. Efficacy was affected in all parameters evaluated for each group of insecticides, demonstrating that different formulations can deliver different biological activity in the control of various pests.

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Section: Introductionmentioning

confidence: 99%

Role of the Formulation in the Efficacy and Dissipation of Agricultural Insecticides

Buzzetti¹

2018

Insecticides - Agriculture and Toxicology

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“…2A,B). In pesticide delivery, measurement on spray droplet size is critical since droplet size plays a significant role on the distribution and coverage of pesticide on foliage thereby reducing environmental pollution, repeated application to enhance pesticide efficacy [23–24]. Spraying into solution was followed by imaging and dynamic light scattering (DLS).…”

Section: Resultsmentioning

confidence: 99%

Spray stability of self-assembled filaments for delivery

Mahmud

Harada

Rajagopal

et al. 2017

Journal of Controlled Release

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Filamentous viruses are common in nature and efficiently deliver – sometimes via aerosol – genetic material, viral proteins, and other factors to animals and plants. Aerosolization can be a severe physicochemical test of the stability of any filamentous assembly whether it is made from natural polymers such as viral proteins or synthetic polymers. Here, worm-like “filomicelles” that self-assemble in water from amphiphilic block copolymers were investigated as aerosolized delivery vehicles. After spraying and drying, fluorophore-loaded filomicelles that were originally ~10–20 μm long could be imaged as 2–5 μm long fragments that survived rehydration on natural and artificial surfaces (i.e. plant leaves and glass). As a functional test of delivery, the hydrophobic pesticide bifenthrin was loaded into filomicelles (up to 25% w/w) and sprayed onto plants infested with two agricultural pests, beet army worm or two-spotted spider mites; pesticidal efficacy exceeded that of commercial formulations. Persistent delivery by the filomicelle formulation was especially notable and broadly consistent with previous intravenous delivery of other drugs and dyes with the highly elongated filomicelles.

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“…In the practical application scenarios of target spraying control, there are many factors that affect the utilization of pesticides. In addition to the pesticide application apparatus, pesticide application liquid amount, meteorological conditions, and other factors, the target's biological characteristics and the physical and chemical properties of the pesticide liquid are also significant [12][13][14][15][16]. Before flowering, air-assisted sprayers are adopted for pest control in orchards, and the utilization of the pesticides is up to 38% [17].…”

Section: Introductionmentioning

confidence: 99%

Synergistic Effect of Orange Oil Adjuvant on Acetamiprid in the Control of Edentatipsylla shanghaiensis

Yan

Fang

et al. 2023

Sustainability

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We explore the effects of orange oil adjuvant (a kind of spray adjuvant) on the physicochemical properties of acetamiprid (pesticide) when foliage-applied to the surface of pittosporum tobira leaves. The leaf surface was characterized by the OCG (Van Oss–Chaudhury–Good) method, and the relationship between the wetting behavior of various pesticide droplets, including the change in surface free energy (SFE), adhesion force, and adhesion work, is explored to offer insight into the control of the pittosporum tobira psyllid, Edentatipsylla shanghaiensis Li et Chen. Results showed that SFE values for the adaxial and adaxial leaf surfaces were 40.13 mJ/m2 and 37.06 mJ/m2, respectively, while acetamiprid liquids had SFE values of 67.43 mJ/m2 and 63.26 mJ/m2. SFE values of the acetamiprid liquids are greater than that of the leaf surface, and the droplets on the leaves with a smaller adhesion force and lager adhesion work exhibited moderate-to-poor wettability estimated by contact angles. When the concentration of the orange oil adjuvant was between 0.10% and 1.00% above CMC (critical micellar concentration, 0.09%), the SFE values of the acetamiprid liquids were less than that of the leaf surface. The adhesion tension was greatly increased, and the adhesion work decreased by 14.46–28.13%. Meanwhile, droplets on the leaves exhibited good wettability. Field experiments showed that the synergistic effect of acetamiprid against E. shanghaiensis was significantly improved after spraying with orange oil adjuvant at the concentrations 0.10% and 1.0% above CMC. This study demonstrated the use of an orange oil adjuvant with a concentration above CMC to improve the synergistic effect of the insecticide directly through improved leaf wetting, which can provide reference for reducing pesticide dosage and increasing efficiency during the chemical control of pests.

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Spray deposits: Opportunities for improved efficiency of utilizationvia quality, quantity and formulation

Cited by 4 publications

References 17 publications

Role of the Formulation in the Efficacy and Dissipation of Agricultural Insecticides

Role of the Formulation in the Efficacy and Dissipation of Agricultural Insecticides

Spray stability of self-assembled filaments for delivery

Synergistic Effect of Orange Oil Adjuvant on Acetamiprid in the Control of Edentatipsylla shanghaiensis

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