Walnut Blight Management g g Model for Predicting g g Model for ...

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PolycyclicRainfall, Stage of Growth and Spray Timing for the Tehama Chandler Walnut BlightExperimentDate Rainfall (nat) 1 Rainfall (sim) 2 Event3/20/07 .13 in — —3/23/07 — — 14% prayer3/26/07 .11 in — —3/27/07 — — 41% prayer3/29/07 — — first pollen3/30/07 — — 58% prayer, spray #13/31/07 — .72 (10 hrs) —4/2/07 — — 62% prayer4/4/07 — .72 (10 hrs) —4/5/07 — — 61% prayer, 1st flowers4/9/07 — — spray #24/10/07 — .72 (10 hrs) —4/11/07 — — 50% prayer, full bloom4/17/07 .05 in — —4/18/07 — .11 (1.5 hrs) spray #34/19/07 — .72 (10 hrs) —4/22/07 .11 in— —4/30/07 — — spray #45/1/07 .12 in — —5/3/07 .33 in — —5/4/07 .02 in — —5/10/07 — — spray #51Natural rainfall – (CIMIS) Gerber) 7 events for .90 inches2Simulated rainfall – (overhead sprinklers) 5 events for 2.99 inches
PolycyclicBlight Symptoms on untreated walnuts under simulated rainfall. Tehamaexperiment 2007. Comparisons were made under significant disease pressure100.0%% Blight vs. TimeChandler variety90.0%80.0%70.0% 0%60.0%50.0%40.0% 0%30.0%20.0%10.0% 0%0.0%4/27 5/3 5/7 5/10 5/14 5/17 5/21 5/29% BLIGHTED NUTS
Page 1: Walnut Blight ManagementModel for P
Page 4: Material ChoiceAny good quality cop
Page 8 and 9: Shoot nut set for four prayer stage
Page 10 and 11: Tagged walnut branch showing a clos
Page 15 and 16: Monocyclic - complete only one or p
Page 17 and 18: MonocyclicWalnut blight symptoms fo
Page 19: Polycyclic - can complete many dise
Page 23 and 24: Tehama Blight PlotsYear Blight Popu
Page 25 and 26: How to Kill Blight in Tehama County

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