What kind of wrap should be used?
The plastic wrap used in making baleage is a polyethylene plastic film that is pre-stretched 50 to 70% by the wrapper as it is applied to the bale. The plastic must be able to withstand the local environmental conditions such as UV radiation and changes in ambient air temperature. Tear strength and tack (stickiness) may also vary among brands of wrap. Most farm supply stores either carry or can obtain stretch-wrap plastic for baled silage. Check with the supplier and/or local producers to see which brands promote proper fermentation in your area.
Plastic film may be white or black. White plastic is most common in this region since it reflects sunlight better and reduces radiational heating of the plastic. In more northern climates, such heating might be desirable to improve the environment for fermentation or help prevent freezing of the silage that makes feeding more difficult.