Article Figures & Data
Figures
- Figure 1.
Length of lesions (Y axis) caused by artificial inoculations of Phytophthora ramorum in untreated and phosphite-treated potted coast live oak trees in Expt. 4. Length of lesion in untreated trees (PC) is compared with that in trees treated by means of therapeutic drench (TD), therapeutic foliar spray (TF), therapeutic injection (TI), and preventive injection (PI).
- Figure 2.
Results from Expt. 7 comparing efficacy of several preventive phosphite treatments. Treatments were as follows: PC = untreated trees; PennsylvaniaI = preventive Aliette injection; PNI = preventive Nutriphyte injection; PPhI = preventive Phostrol injection; PSSAI = preventive SuperSODAway injection; PVI = preventive Vital injection; PennsylvaniaI = preventive Agrifos injection; PennsylvaniaP1B = preventive Agrifos + Pentrabark 2.5% bark application; PennsylvaniaP2B = preventive Agrifos + Pentrabark 7.5% bark application. All treatments were effective at P < 0.0001.
- Figure 3.
Regression analysis between average percentage of disease control (Y axis) and hours elapsed between pathogen inoculation and treatment (X axis).
Tables
- Table 1.
List and date of individual experiments, including all treatments tested for each trial and untreated controls.z
Expt. Treatment and dates N Avg. lesion length SD P Phytotoxicity 1 Seven treatments; begin 5/15/2001 end 8/15/2001 105 <0.001 1 Aliette drench therap. 15 70.8 18.1 No 1 Aliette foliar therap 15 59.5 10.4 Yes 1 Aliette injection therap. 15 49.7 10.5 <0.05 No 1 Nutriphyte drench therap. 15 67.1 17.4 No 1 Nutriphyte foliar therap. 15 60.4 13.5 Yes 1 Nutriphyte injection therap. 15 41.3 10.2 <0.01 No 1 Untreated 15 66.0 16.9 No 2 Three treatments; begin 11/14/2001 end 2/29/2002 45 <0.001 2 Aliette bark therap. 15 77.4 32.3 No 2 Nutriphyte injection therap. 15 27.9 14.9 <0.001 No 2 Untreated 15 77.8 37.4 No 3 Three treatments; begin 11/7/2001 end 3/15/2002 45 <0.05 3 Nutriphyte injection therap. 15 50.8 17.8 <0.05 No 3 SuperSODAway injection therap. 15 45.0 18.4 <0.05 No 3 Untreated 15 77.6 25.9 No 4 Eight treatments; begin 12/7/2001 end 4/10/2002 135 <0.0001 4 Nutriphyte injection therap. 15 37.7 13.2 <0.0001 No 4 Phostrol injection therap. 15 42.2 17.7 <0.001 No 4 Phytoguard injection therap. 15 37.3 12.9 <0.0001 No 4 Aliette injection therap. 15 42.5 13.9 <0.001 No 4 Nutriphyte foliar therap. 15 55.6 18.7 Yes 4 Nutriphyte drench therap. 15 68.9 38.5 No 4 Nutriphyte injection prev. 15 8.3 0.7 <0.0001 No 4 Untreated 30 93.6 60.8 No 5 Six treatments; begin 12/7/2001 end 7/15/2002 105 <0.001 5 Phostrol injection prev. 15 67.7 123 <0.0001 No 5 Phytoguard injection prev. 15 47.3 59.7 <0.001 No 5 Aliette injection prev. 15 43.9 42.8 <0.001 No 5 Nutriphyte injection prev. 15 30 38 <0.0001 No 5 Nutriphyte foliar prev. 15 75 41.8 Yes 5 Untreated 30 169 193 6 Three treatments; begin 4/15/2002 end 7/12/2002 27 <0.0001 6 Nutriphyte injection prev. 9 39.2 7.3 <0.0001 No 6 Nutriphyte foliar prev. 9 93.6 46.9 Yes 6 Untreated 9 100 15.5 7 11 treatments; begin 7/16/2002 end 10/22/2002 50 <0.0001 7 Agrifos + Pentrabark (2.5%) preventive trunk appl. 5 13.6 2.6 <0.0001 No 7 Agrifos + Pentrabark (7.5%) preventive trunk appl. 5 13.4 3.4 <0.0001 No 7 Agrifos injection prev. 5 14 3.6 <0.0001 No 7 Aliette foliar prev. 5 15.3 5.8 <0.0001 Yes 7 Aliette injection prev. 5 17.1 6.9 <0.0001 No 7 Nutriphyte injection prev. 5 16.9 7.9 <0.0001 No 7 Phostrol injection prev. 5 13.9 2.4 <0.0001 No 7 Phostrol foliar prev. 5 26.6 14.8 Yes 7 SuperSODAway inj. prev. 5 10.7 1.8 <0.0001 No 7 Vital injection prev. 5 13.6 5.8 <0.0001 No 7 Untreated 5 51.7 9.8 No ↵zNumber of trees (N) used in each experiments and for each treatment are shown, followed by average length of lesion, standard deviation (SD), statistical significance (P), and phytotoxicity as foliar scorch and dieback.
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