East Malling Rootstock Club Policy Group meeting 15th September 2017

Transcription

1 East Malling Rootstock Club Policy Group meeting 15th September 2017

2 Preliminary apple trial (RF185) Planted 2012 Four NIAB-EMR rootstock selections : M306-6 M M M Standards M9, M106 and MM116 Gala under conventional orchard management

3 Preliminary apple trial (RF185) M306-6 Girth measurements, fruit size and yield were greater than M116 (ns) Highest cumulative yield (ns) Yield efficiency similar to MM106 and M116 Fruit size was better than with M116, with a higher percentage of large fruit (>55m: 99% for M306-6 v 77% for M116) Note: one tree was suffering from canker in WAA susceptible

4 Preliminary apple trial (RF185) M tree volume was significantly greater than all other stocks in the trial significantly greater weight of wood removed during pruning total yield was the second highest, only being surpassed by M306-6 high cumulative yield was greater (ns) than the standards. however yield efficiency was relatively low (ns), compared to M116 Similar results to 2015 WAA susceptible

5 Preliminary apple trial (RF185) M similar to M9 in terms of vigour, with a similar mean girth and tree volume (slightly larger although not significant) slightly lower (ns) yield with a lower proportion of large fruit than M9 (>65mm: 57% for M v 87% for M9), in contrast to previous years cumulative yield was very similar to M9 WAA susceptible

6 Preliminary apple trial (RF185) M significantly narrower girth and smaller tree volume than the other stocks tree volume approximately one-third of the volume of M9 total and cumulative yields were lower than for all the other stocks Highest yield efficiency (ns), but approximately half of that achieved with M9

7 Preliminary apple trial (RF185)

8 Preliminary apple trial (RF185) Rootstock Girth (cm) Tree volume (m 3 ) Pruning weight (g) Cumulative yield (kg) Yield efficiency (kg/cm 2 ) M a 11.9b 871a M a 17.1a 896a M b 6.3d 239b M c 1.9e 171c M9 8.7b 5.4d 311bc MM b 7.2cd 499b M b 9.7bc 578b SED (17 d.f.) Significance *** *** *** ns ns LSD p=

9 65 mm mm <55 mm Total 65 mm mm <55 mm Total Preliminary apple trial (RF185) Rootstock Mean yield per tree (kg) Mean number of fruit per tree M M M M M MM M SED (17 d.f.) Significance ns ns ns ns ns ns ns ns LSD p=

10 Preliminary pear trial (RF187) Planted NIAB-EMR selections, scion Conference, compared to Quince A Significant differences in terms of girth, height and tree volume Two trees on PQ37-3 were dead, leaving only two replicates for analysis in the trial. PQ37-5 that gave a significantly smaller tree in terms of girth, height and tree volume than all of the other selections tested PQ37-2 and PQ39-5 had a significantly larger tree volume than the standard (Quince A) The remaining selections were otherwise not significantly different from the standard at this early stage of trialling. These results correlate well with those reported in 2015.

11 Preliminary pear trial (RF187) Girth (cm) Height Number of Tree volume (cm) suckers (m 3 ) PQ a 25.8a a PQ d 22.4abc b PQ e 11.0 e c PQ abc 20.3bc b PQ d 15.3d b PQ d 21.8abc b PQ cd 21.8abc b PQ bcd 20.0c ab PQ d 24.3ab ab PQ ab 21.8abc a Quince A 10abc 23.8abc 0 1.2b SED (28 d.f.) Significance *** *** ns * LSD p=

12 Second stage apple trial (EE207) Planted 2010 Five NIAB-EMR rootstock selections : AR852-3 AR839-9 B24 R104 R59 Standards M27, M9 and M26 Gala & Braeburn under conventional orchard management

13 Second stage apple trial (EE207) AR852-3 Braeburn AR852-3 Gala WAA & fireblight resistant? less productive than it had been in 2014 & 2015 yield comparable to M9 fruit size remained high yield efficiency & tree volume similar to M9 cumulative total yield & yield efficiency similar to M9 higher cumulative yield of fruit >65mm than M9 numbers of suckers was very low as with Braeburn, gave a comparable yield to M9 fruit size was relatively small, in contrast to previous years results and Braeburn yield efficiency was similar to M9 vigour was greater than both M9 and M26 tree volume similar to that measured when grown with a Braeburn scion

14 Second stage apple trial (EE207) AR839-9 Braeburn AR839-9 Gala Fireblight susceptible similar in many respects to M9 giving a similar: yield proportion of fruit >65mm tree girth number of suckers BUT vigour (tree volume) less than M9 cumulative yield & yield efficiency less than M9 yield & proportion of fruit >65mm similar to M9 total yield slightly higher than both M9 and M26 cumulative yield and yield efficiency were greater than for M26 but slightly less than for M9 vigour (tree volume) was most similar to M9

15 Second stage apple trial (EE207) B24 Braeburn B24 Gala Fireblight Susceptible, WAA resistant greatest vigour highest pruning weight highest total yield in 2016 cumulative yield similar to M9 BUT yield efficiency 2 nd lowest greatest vigour highest total yield in 2016 cumulative total and class 1 yield greater than for M9 BUT yield efficiency was significantly lower than both M9

16 Second stage apple trial (EE207) R104 Braeburn R104 Gala Fireblight susceptible greater vigour than M26 and M9 girth similar to M26 2 nd highest total yield in 2016, repeating the high-yielding pattern exhibited in yield was much higher than for M26 but more similar to M9 2 nd highest cumulative total yield higher yield efficiency than M26, similar to M9. less suckering than the controls vigour most similar to M9, but with a larger girth and over double the pruning weight relatively high yield in 2016, but yield of class 1 fruit size was low cumulative yield was lower than M9 and M26 yield efficiency lowest of all the rootstocks tested

17 Second stage apple trial (EE207) R59 Braeburn R59 Gala WAA & fireblight susceptible similar in many respects to M27 comparable yield in 2016, but with a higher cumulative yield and yield efficiency vigour & girth similar to M27 BUT smaller fruit size no suckers (1.5 per tree on M27) similar in many respects to M27 BUT unlike with Braeburn had a lower yield but with a higher cumulative yield, and yield efficiency (ns) vigour & girth similar to M27

18 Second stage apple trial (EE207) Braeburn Gala

19 Second stage apple trial (VF224) Planted 2010 Four NIAB-EMR rootstock selections : AR AR809-3 AR R80 Standards M116 & M106 Red Falstaff under organic orchard management

20 Second stage apple trial (VF224) AR similar to M116 in terms of vigour and yield efficiency, but with a slightly lower yield, both in 2016 of and cumulatively (ns) WAA & fireblight susceptible AR809-3 significantly smaller girth size and tree volume than all the other rootstocks as has been noted in the previous years ( ) yield was lower in every category than all other rootstocks tested WAA & fireblight susceptible

21 Second stage apple trial (VF224) AR largest tree volume, significantly greater than all other stocks with the exception of R80 total yield was slightly higher than M116 fruit size was large, as noted in previous years total cumulative yield and yield efficiency were similar to M116 cumulative yield of large fruit (>65mm) was significantly greater than M116 Fireblight resistant?

22 Second stage apple trial (VF224) R80 high total yield (as in previous years), significantly higher than AR809-3 and MM106. cumulative yield which was greater than all the other stocks in large tree volume which was larger than MM106, and only surpassed in volume by AR Fireblight susceptible

23 Second stage apple trial (VF224)

24 Canadian rootstock trial (SP250) Nine Canadian rootstock selections compared to M9, M26, M27 and MM106 Braeburn and Gala under conventional orchard management Planted 2014 Due to errors during propagation the trial was planted with an unbalanced experimental design and some of the rootstocks are only present with one of the two scion varieties Braeburn Gala Braeburn and Gala SJM127 SJM15 SJM167 SJM188 SJM189 SJP SJP SJP SJP

25 Canadian rootstocks Tree volume and girth

26 Canadian rootstocks Total yield and number of fruit

27 Canadian rootstocks Yield efficiency