New England blackbutt

Eucalyptus andrewsii ssp. campanulata

New England blackbutt (Clemson, p.79) is a very important honey and pollen tree of the Northern Tablelands of NSW. In good years crops of 30 to 40 kg of honey and suitable pollen for breeding can be obtained. New England blackbutt needs good soil moisture. If there are drought conditions when this tree flowers it may not yield pollen or nectar at all.

The pollen is of medium to good quality, with a protein content of 20% to 22%. Except for iso-leucine the pollen has a reasonable amino-acid profile (Table 27). The low level of iso-leucine makes blackbutt pollen equivalent to a pollen of 17% to 19% crude protein which is a little low for hard-working bees.

Bees foraging on New England blackbutt will usually breed well as both nectar and protein are adequate. However, if a very heavy honey crop is obtained, the bees will be stressed and may need an additional feed of pollen or supplementary protein before moving onto a heavy midsummer honey flow.

The pollen of New England blackbutt would be good to collect and save for feedback to the bees. However, due to the low levels of the amino-acid iso-leucine, it would best be fed back as a pollen and soyflour mix.

Table 27: New England blackbutt E. andrewsii ssp. campanulata

Amino-acid
Minimum % of Amino-Acid from De Groot (1953)
Caraldool 

Nov 1987

Drake 

Nov 1990

Drake 

Nov 1991

Threonine 3.0 4.0  3.4  3.3 
Valine 4.0 4.1  4.7  3.9 
Methionine 1.5 1.9  1.6  2.0 
Leucine 4.5 6.2  6.3  5.7 
Iso-leucine 4.0 3.1* 3.8* 3.2*
Phenylalanine 2.5 3.7  3.8  3.6 
Lysine 3.0 5.8  5.6  4.8 
Histidine 1.5 3.2  2.0  2.0 
Arginine 3.0 4.4  5.3  5.7 
Tryptophan 1.0   2.7  
Crude protein - 22.1% 20.6% 22.25%

* Low level of this amino-acid


Click here to return to the Pollen Index

Click here to return to the Honeybee Ausrtalis front page