Palm Problems Key - Trunk

Gummy sap flowing from trunk; usually discolored (“bleeding”)
Fig-65-Thielaviopsis-coconut-palm-trunk-bleeding-025-150x180 

a. Bleeding from single large wound with evidence of wood rot

1) light salmon pink spores present on trunk—Gliocladium trunk rot 2)

2 ) light salmon pink spores not present; rotted, black fibers remain; often upper half of trunk.

Thielaviopsis trunk rot (Fig. 65)

FACTSHEET: http://edis.ifas.ufl.edu/PP143

Fig-66-Lightning-damage-on-Queen-L-150x180 

b. Bleeding from one or more widely dispersed areas throughout the trunk

1) symptoms appear rapidly and all at one time (1 to 7 days)

lightning injury (Fig. 66)

FACTSHEET: http://edis.ifas.ufl.edu/EP263

2) symptoms do not appear rapidly; evidence of nail hole, climbing spikes, woodpecker feeding, etc.—physical injury

Holes in trunk
Fig-67-Beetle-holes-on-Wash.-filifera-150x180 

a. holes present at any location along trunk

1) large 5/8 inch diameter holes; on Washingtonia only in California, Utah, and Arizona—

borer damage (Dinapete) (Fig. 67)

2) many small 1/4 inch diameter holes, often in rows—woodpecker feeding damage

Fig-68-Sawdust-plug-from-beetle-boring-into-Carp.-150x180 

3) very small 1/16 inch diameter holes, randomly dispersed; typically having sawdust plugs protruding out of hole—ambrosia beetle damage (Fig. 68)

http://creatures.ifas.ufl.edu/trees/beetles/platypus.htm

 Fig-69-spiked-palm-trunk-150x180

4) evidence of nail hole, climbing spikes, woodpecker feeding,etc.

physical injury (Fig. 69)

Longitudinal splitting of trunk
 Fig-70-Lightning-split-trunk-of-CID-150x180

a. palm rapidly dying (1 to 7 days)

lightning injury (Fig. 70)

http://edis.ifas.ufl.edu/EP263

 Fig-71-Overwatered-palm-Lyan-Arbor-L-150x180

b. palm appears to be otherwise healthy

excessive water uptake (Fig. 71)

http://edis.ifas.ufl.edu/EP263

Tapering of trunk near the top (pencil pointing)
Fig-8_N,K-def-on-Royal-150x180 

a. leaves chlorotic and/or necrotic

1) leaves chlorotic, but no necrosis present

nitrogen deficiency (Fig. 8)

http://edis.ifas.ufl.edu/EP268

 Fig-9_K def-Coconut 2-150x180

2) leaves chlorotic and necrotic

late stage potassium deficiency (Fig. 9)

http://edis.ifas.ufl.edu/EP269

Shriveling of trunk
Fig-72a-Shrivelled-trunk-from-planting-too-deeply-QueenH-150x180 

5. shriveling of trunk

water stress (Figs. 72a)

(may be caused by deep planting, in addition to very severe drought)

http://edis.ifas.ufl.edu/EP263

 Fig-72b-sunken-twisted-royal-trunk2-150x180

water stress (Figs. 72b)

(may be caused by deep planting, in addition to very severe drought)

http://edis.ifas.ufl.edu/EP263

Fungal conk (basidiocarp) present on lower trunk
Fig-1_GZ_conk-150x180 

6. fungal conk (basidiocarp) present on lower trunk

Ganoderma butt rot (Fig.1)

http://edis.ifas.ufl.edu/PP100

Trunk collapses on itself; trunk rotted at point of collpase
Fig-73-Thielaviopsis-coconut-palms-021-150x180 

7. trunk collapses on itself; trunk rotted at point of collpase

Thielaviopsis trunk rot (Fig. 73)

FACTSHEET: http://edis.ifas.ufl.edu/PP143

Leaf canopy falls off trunk
Outer “bark” of trunk sloughs or peels off
Fig-75-sloughing-bark-sabal1L-150x180 

9. outer “bark” of trunk sloughs or peels off

natural phenomenon (Fig. 75)