Like so many other trees - when cutting all the lower side branches - a stem is first grown to the height the farmer wants - then when the cutting of side branches stops the bushy part of a guava tree starts to develop.
In this picture we see the true natural shape of a guava bush - about 3 meters in diameter - grown in mixed culture in Bicol province. This guava bush shown here has some 100+ fruits - none of them needs protection from fruit flies as in a true mixed culture if at all only a small percentage may be lost to insects - the natural mixed and hence strong environment is the best protection. A true native climate of the fruits is the best assurance to have s strong plant or tree with a rich harvest. While "exporting" plants into other climate-zones may lead to ill or weak plants and trees that then become prone to all kinds of illness or insects due to the weakness of that plant in a foreign NON-suitable climate.