A timelapse set up in spring 2014 to visualise the expression of Sepal Browning and leaf spot in Hayward kiwifruit.
The shot is focused on one of the control vines as part of a trial conducted by Fruitfed Supplies Senior Technical Advisor, Tayah Ryan, which evaluated the field efficacy of various treatments in controlling Psa. The control vines received no Psa protective sprays through the spring.
Tayah has been conducting this type of trial for the last three seasons and believes that the rapid arrival of symptoms in this video is typical, however the timing of symptom arrival is atypical. Sepal Browning has appeared in similar timing for the last three years, so the expression in the video appears "typical". In contrast, whilst 2012 and 2013 seasons saw leaf spotting arrive around Labour weekend (mid-late Oct), 2014 saw the majority of leaf spot arrive starting 11th November, as displayed in the video. It is important to remember that arrival of symptoms means that infection has already occurred, so when considering key periods for control, growers need to be targeting weather events approximately 7-14 days prior to typical symptom arrival.
This visualisation is a reminder that growers need to remain vigilant in their Psa protective programs, as even in what was largely considered a low disease pressure season, a zero Psa spray program can still have significant impact on plant health.
For information on this trial, or the spray programs used, contact Tayah on email@example.com or any Fruitfed Supplies representative.
Timelapse is a great way to view plant growth habits or how plants respond to treatments. If you are interested in using this technology in your orchard, feel free to contact firstname.lastname@example.org