Factors influencing the efficacy of two organophosphate insecticides in controlling California red scale,<i>Aonidiella aurantii</i>(Maskell). A basis for reducing spray application volume in Mediterranean conditions

Garcerá, Cruz; Moltó, Enrique; Chueca, Patricia

doi:10.1002/ps.3515

Cited by 20 publications

(23 citation statements)

References 28 publications

(69 reference statements)

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“…Similarly, the upperside of the leaves had more coverage than the underside. These results agree with those obtained by other authors using axial fan airblast sprayers [32][33][34][35][36][37] and with handgun hydraulic sprayers [10,37] and also indicate the necessity to improve the equipments to obtain more homogeneous coverage in all the canopy.…”

Section: Discussionsupporting

confidence: 92%

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CitrusVol Validation for the Adjustment of Spray Volume in Treatments against Tetranychus urticae in Clementines

et al. 2019

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The optimization of the water volume used to apply pesticides with airblast sprayers is key to reducing water footprint, costs, operational time and drift of pesticides. This study evaluated a new tool (CitrusVol) that adjusts the spray volume to the characteristics of the vegetation and the pesticide used to control the two-spotted spider mite Tetranychus urticae in clementine trees. This mite is one of the main citrus pests because it damages fruit before harvest. For this aim, a total of 20 applications against T. urticae were evaluated during two consecutive years in seven commercial orchards. In these orchards, we evaluated: (i) the distribution of the spray in tree canopies, (ii) pest density before and after the treatment, and (iii) fruit damage at harvest when conventional volumes and volumes adjusted with CitrusVol were applied. On average, CitrusVol reduced 36% the water volume used to control T. urticae in the 20 applications. This reduction in the spray volume involved a decrease in the coverage in some parts of the canopy. However, T. urticae density and fruit damage at harvest were similar in trees treated with the adjusted volume calculated with CitrusVol and the volume used by the owners of the orchard. Therefore, the spray volume recommended by CitrusVol is adequate to control T. urticae in clementines.

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Section: Discussionsupporting

confidence: 92%

“…Higher volumes of water are generally used for pests, such as T. urticae, that feed and develop in the underside of the leaves. However, the high volumes used to control these pests are not always supported by field studies as has been demonstrated by Garcerá et al [10].…”

Section: Of 24mentioning

confidence: 99%

CitrusVol Validation for the Adjustment of Spray Volume in Treatments against Tetranychus urticae in Clementines

et al. 2019

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“…Although various environmentally friendly pest control tools, such as habitat management, cultural practices, mating disruption, and biological control, are currently adopted and implemented in citrus crops worldwide (Lim et al, 2006;Vacas et al, 2012;Aguilar-Fenollosa and Jacas, 2013;Chueca et al, 2013), chemical treatments are frequently applied in citrus groves (Rill et al, 2008;Garcerá et al, 2014;Monzò et al, 2014). The use of selective pesticides is therefore crucial for maintaining natural enemy populations and their ecosystem services (Prabhaker et al, 2007;Suma et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

Life stage-dependent susceptibility of Aphytis melinus DeBach (Hymenoptera: Aphelinidae) to two pesticides commonly used in citrus orchards

et al. 2015

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“…In addition, these models can also be used to estimate the expected efficacy of field applications from coverage obtained on WSP situated at different positions of the canopy, by calculating the expected control of the pest using the efficacy models (Garcerá et al, 2014).…”

Section: Discussionmentioning

confidence: 99%

Development of models to predict product deposition from coverage obtained on artificial collectors and their practical application

Garcerá¹,

Moltó²,

Chueca³

2014

Span. j. agric. res.

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Models to relate the observed coverage on artificial collectors used in field tests (water-sensitive paper, WSP) and in laboratory bioassays of citrus pests (pieces of polyvinyl chloride sheets, PVC) with product deposition are described. Different solutions of plant protection products commonly used for pest control in citrus were sprayed in a Potter Tower on PVC and WSP under the same controlled conditions. These experiments led to the formulation of different basic models to relate coverage and deposition depending on the products and collectors. The best fitting model was selected from among those that had highest coefficients of determination (R 2 ) and lowest estimation error (RMSEP), and at the same time resulted in a normal distribution of residuals. Finally, coverage on pieces of PVC sheets was related with coverage obtained on WSP by different equations depending on the product being applied. Such equations can be used to link laboratory and field results in order to assess the quality of a spray application in citrus cultivation.

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Factors influencing the efficacy of two organophosphate insecticides in controlling California red scale,Aonidiella aurantii(Maskell). A basis for reducing spray application volume in Mediterranean conditions

Abstract: Because the spray application volume did not affect the final infestation, this research introduces the possibility that reducing the doses of current citrus organophosphate treatments may still allow effective plant protection in Mediterranean conditions.

Cited by 20 publications

References 28 publications

CitrusVol Validation for the Adjustment of Spray Volume in Treatments against Tetranychus urticae in Clementines

CitrusVol Validation for the Adjustment of Spray Volume in Treatments against Tetranychus urticae in Clementines

Life stage-dependent susceptibility of Aphytis melinus DeBach (Hymenoptera: Aphelinidae) to two pesticides commonly used in citrus orchards

Development of models to predict product deposition from coverage obtained on artificial collectors and their practical application

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