Pesticides applications assessment in banana crop conditions: a methodological approach

Bonicelli, Bernard; Cotteux, Éric; Douzals, Jean‐Paul

doi:10.1007/s11356-015-4953-1

Cited by 6 publications

(1 citation statement)

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“…Measurements are sometimes designated ‘spray physical efficacy’. Many methodological approaches have been used to assess the target coverage of a spray application, assuming that coverage (target spray deposition amount and the number and dimension of spray droplets impacts) may be considered an indirect indicator of biological efficacy. In addition, spray efficacy through physical deposition can be determined more easily and rapidly immediately after spray application, compared with the biological efficacy assessment during the whole cropping cycle.…”

Section: Introductionmentioning

confidence: 99%

Development of a rapid methodology for biological efficacy assessment in banana plantations: application to reduced dosages of contact fungicide for Black Leaf Streak Disease (BLSD) control

Bakache

Douzals

Bonicelli

et al. 2018

Pest Management Science

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BACKGROUND Black sigatoka is the main disease of banana crop production and is controlled by using either systemic or contact fungicides through spray applications. Biological efficacy is typically assessed on a whole cropping cycle with a natural infestation and periodic spray applications. Developing a faster methodology for assessment of the biological efficacy of a contact fungicide offers promising perspectives for testing current and new fungicides or application techniques. RESULTS The methodology is based on the time of occurrence of the first BLSD symptoms. An artificial infestation protocol was optimized by multiplying the infestation spots and by covering the infested plants. Biological efficacy tests were based on a single spray application after infestation combining three mancozeb dose reductions and two nozzle types. Results demonstrated that a 50% reduction in the mancozeb rated dosage gave significant efficacy independently of the nozzle type, with a reduction of the number of lesions of up to 55% compared with control plants. CONCLUSIONS The described method provides rapid and significant infestation. Further comparison of spray settings and fungicide doses was possible. This methodology will be tested at the plantation scale over a longer period covering the whole crop cycle. © 2018 Society of Chemical Industry

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Section: Introductionmentioning

confidence: 99%