Pilliga, white bloodwood

Eucalyptus trachyphloia

The Pilliga or white bloodwood (Clemson, p. 63) yields large volumes of pollen and honey when it flowers in the autumn, especially when ground moisture is high.

The pollen has a crude protein level of 21.8% to 24%, but iso-leucine levels are low, averaging 3.6% (Table 12). This would reduce the overall digestibility of the crude protein.

Yields of 200 to 300 grams of pollen per day and 40 to100 kg of honey per hive for the flowering have been reported. After the honey flow the hives are often full of bees.

Bloodwood pollen would be useful to trap and feed back to the bees at a later date, as bees find it very palatable.
 

Pollen grains of Pilliga bloodwood seen under a microscope (X400)

Table 12: Pilliga bloodwood or white bloodwood Eucalyptus trachyphloia


Amino-acid
Minimum % of Amino-Acid from De Groot (1953)
Pilliga March 1987
Coonabarabran March 1990
Pilliga March 1994
Threonine
3.0
3.98  3.4  3.4 
Valine
4.0
4.11  4.6  4.3 
Methionine
1.5
2.01  1.8  2.2 
Leucine
4.5
7.04  6.3  6.2 
Iso-leucine
4.0
3.22* 3.9* 3.7*
Phenylalanine
2.5
4.23  3.8  3.7 
Lysine
3.0
4.69  5.6  5.5 
Histidine
1.5
2.59  2.2  2.3 
Arginine
3.0
6.69  6.2  5.8 
Tryptophan
1.0
- 2.6  -
Crude protein   22.5% 23.9% 21.8%
Fat   1.4%    

* Low level of this amino-acid


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