Fast optical assessment of pesticide coverage on plants

Hake, Harald; Ben-Zur, Ravid; Schechter, Israël; Anders, A.

doi:10.1016/j.aca.2007.05.061

Cited by 8 publications

(21 citation statements)

References 17 publications

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“…The surface tension of liquid and the contact angle on leaves can reflect the spreadability of pesticide droplets on the plant leaves (Yu et al 2009). The spreadability of droplets will increase with decreasing liquid surface tension and leaf contact angle (Hake et al 2007). Ir.…”

Section: Discussionmentioning

confidence: 98%

Synergistic effect of imidacloprid combined with synergistic agents (Beichuang, Jiexiaoli) onMyzus persicae(Hemiptera: Aphididae)

Chen

Zhang

et al. 2014

International Journal of Pest Management

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Myzus persicae is a well known aphid pest, which can transport plant viruses to plants of the nightshade/potato family, namely the Solanaceae, and other food crops. Our aim was to explore the effects of imidacloprid combined with synergistic agents (Beichuang and Jiexiaoli) on Myzus persicae. Different concentrations of imidacloprid combined with synergistic agents were used to treat M. persicae. Biological activity of M. persicae was analyzed under indoor conditions, and the control efficiency of the admixture was determined through field experiments. The penetration rate of the admixture on tobacco leaf and M. persicae was analyzed, and the liquid surface tension and contact angle was measured. Imidacloprid combined with Beichuang and Jiexiaoli showed significant synergistic effects with high control efficacy. Beichuang and Jiexiaoli significantly improved the penetration of imidacloprid into the cuticle of tobacco leaves and the insect body wall. The surface tension and contact angles were abated by synergists. The combination of imidacloprid with Beichuang and Jiexiaoli showed a significant synergistic effect, which can be used for decreasing the dosage of imidacloprid and improving its long-term control efficacy.

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Section: Discussionmentioning

confidence: 98%

Synergistic effect of imidacloprid combined with synergistic agents (Beichuang, Jiexiaoli) onMyzus persicae(Hemiptera: Aphididae)

Chen

Zhang

et al. 2014

International Journal of Pest Management

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“…Based on the above fi ndings, a more comprehensive attempt was carried out to establish possible assessment of pesticide coverage on plants using optical methods ( Hake et al 2007 ). Although pure chemicals were used in many previous investigations, in this study, all pesticides were prepared and treated according to the manufacturers' recommendations.…”

Section: Fast Optical Assessment Of Pesticide Coverage On Plantsmentioning

confidence: 99%

“…The autofl uorescence of the pesticide solutions is shown in Figure 13 ( Hake et al 2007 ). One microliter of each pesticide solution was tested on a glass slide, using nitrogen laser as excitation source at 337 nm.…”

Section: Laser-induced Autofl Uorescence Spectra Of Pesticidesmentioning

confidence: 99%

“…Fluorescence spectra were measured at an excitation wavelength of 430 nm. The measurements were performed on the same leaf on different locations, before and after application of the pesticide contamination ( Hake et al 2007 ). Figure 14 shows the thus measured fl uorescence spectrum a lemon tree leaf and of a spot on the leaf contaminated by Romectin.…”

Section: Pesticide Effect On Chlorophyll Fl Uorescencementioning

confidence: 99%

“…However, this decrease Autofl uorescence of pesticides: 1 µ l of each pesticide solution was applied and the spectra were obtained using LIF system. Excitation at 337 nm was provided by a nitrogen laser ( Hake et al 2007 ). et al.…”

Section: Pesticide Effect On Chlorophyll Fl Uorescencementioning

confidence: 99%

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Optical analytical methods for detection of pesticides

Ben-Zur

Hake

Hassoon

et al. 2011

Reviews in Analytical Chemistry

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The global pesticide market has grown steadily since the 1940s, with the agricultural sector being the largest user of pesticides. The effect of pesticides on human health is manifested either through direct exposure to the material or indirect exposure to contaminated resources. Farmers and those dwelling near areas where pesticides are used may suffer from direct exposure, while the general population might be exposed indirectly, for example, by drinking contaminated water. Exposure to pesticides may cause a variety of symptoms, including headaches, dizziness, and vomiting, damage the nervous system, and even cause death. The risks involved in pesticide use include air pollution and soil and water contamination. The environmental implications of pesticide use include development of resistance among pests, a decline in biodiversity, interruption of the food chain, and disruption of the ecological balance. Pesticide use may also cause changes in physical parameters of the ecosystem. Effective activity of pesticides requires reaching proper leaf coverage. To prevent pest attacks due to insuffi cient leaf coverage, farmers tend to apply pesticides in excess. In view of the environmental and health implications of pesticide use, there is a clear need to limit pesticide application. Yet farmers lack the means to perform real-time in situ assessment of leaf coverage. Existing pesticide detection methods are complex, time-consuming, and unsuited to fi eld application. Optical methods have the potential to provide quick assessments and can be used in situ. Several optical methods for detection of pesticides in general and on leaves in particular were developed. The fi ndings indicated that the main problems in pesticide detection using fl uorescence are the low autofl uorescence of the pesticides and the nonreproducible a Dedication: This review is dedicated to the late Professor Angelika Anders-von Ahlften of Leibniz University of Hanover (1949-2008). She initiated and promoted with much enthusiasm the research on pesticide detection on plants. She took an active part in this project, with the intention to contribute to reducing the global pesticide usage and protecting the environment. The authors and the whole community are missing her.

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