calyx spray

noun

Definition of calyx spray

: a pesticidal spray applied to fruit trees (as apple and pear) just after the petals fall but before the calyx closes

called also petal fall spray, shuck spray

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“Calyx spray.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/calyx%20spray. Accessed 25 Sep. 2020.

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