Viewing post #1140919 by JRsbugs

sooby said:Yes, I remember way back when the internet was text only and there was nothing like the availability of information there is now. Although now one has to do more sifting through articles that are trying to sell something

Figure 18 on the PDF is a chart that shows the timing of when the life stages occur - there's apparently a long period of "inactivity" which extends the life cycle to two years, so you can have two alternating broods.

I shouldn't have been lazy, the document in book form isn't very long.

For extended breeding the larvae must then reside in the stem and bulb underground. Nature is marvellous, making their survival chances more likely!

I just had a quick read, on page 20 it says egg deposition doesn't begin until the end of April or early May. The larvae remain in the larval form for the first winter, then as adults in cells in the soil formed by the larvae. That suggests, as the hole is new, the larvae has gone to ground to make it's cell? If it resided in the bulb or underground stem for last winter, it could have then made it's way up the stem to feed then ate it's way out?