12 农巧施Alexin2018 - 图文

Bacterial spot – Apricots 杏——疮痂病 Alexin 3 x 500mL b b b Alexin 3 x 300mLb b a a BebecoPal Steynb Alexin 3 x 200mLUntreated Control0 0@P%% Fruit infected Treated from 5mm fruit size, every 14 days

b Alexin, no copper 3x at 28 day intervals

Bacterial spot – Peaches 桃——疮痂病 b Alexin, no copper 3x at 14 day intervals b Copper and Alexin Programme b

Standard Programme

Untreated Control

0%

5%

a 10% 15% 20% 25% 30% 35%

% Infected Fruit Copper at leaf drop + bud swell, Alexin from 75% petal drop

Percentage leaves with bacterial spot lesions on plum trees on the farm Theewaterskloof, Villiersdorp李树细菌性穿孔病

100.00%

80.00%

Percentage infected leaves Songold 60.00%

Laetitia 40.00%

20.00%

Dosage : ? 200 - 300 ml / 100 lit ? 2 – 3 lit / ha Interval : ? 21 – 28 days

0.00%

Visual observations – Xanthomonas on peaches. Shot hole damage

桃树穿孔病