
TY  - JOUR
A1  - Martin, D 
A1  - Lewis, TL 
A1  - Cerny, J 
T1  - Jonathon spot &ndash; Three factors related to incidence, fruit size, breakdown, and seed numbers
JF  - Australian Journal of Agricultural Research
JO  - Aust. J.  Agric. Res.
Y1  - 1961
VL  - 12
IS  - 6
SP  - 1039
EP  - 1049
KW  - 
UR  - https://doi.org/10.1071/AR9611039 
N2  - 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. 
ER  -

