
%0 Journal Article
%A Martin, D 
%A Lewis, TL 
%A Cerny, J 
%T Jonathon spot &ndash; Three factors related to incidence, fruit size, breakdown, and seed numbers
%J Australian Journal of Agricultural Research
%D 1961/12/01
%V 12
%N 6
%P 1039-1049
%K 
%R https://doi.org/10.1071/AR9611039
%U https://www.publish.csiro.au/paper/AR9611039 
%X Observations are reported which show that: (1) There is an interaction between the disorders Jonathan spot and breakdown. There is a negative correlation between them, but the same fruits tend to be susceptible to both disorders. (2) In the absence of other disorders there is a positive intercorrelation between percentage Jonathan spot, mean fruit size, and mean seed number both within and between trees. (3) In the one fruit size group on a tree, fruits with Jonathan spot have a higher mean seed number per fruit than sound fruit, and the seeds have a greater tendency to germinate. (4) Within trees, a thinning treatment which produces fruit of differing sizes but with the same seed number does not alter the percentage Jonathan spot. Between trees, a thinning treatment which produces fruit of the same size but a differing seed number results in differing levels of Jonathan spot. 
