However, here is another fine calabaza, but the hole, which is no larger around than the diameter of a toothpick, is right in the side of the pretty tough shell. Do squash vine borers drill right into tough shells?
The calabaza vines are each 50 feet long, and the older parts of the vines do wilt in midday, which I only now read might be further evidence there are borers in there wreaking havoc. However, I 've not seen any evidence on the vines themselves. I've also not seen the moths that are supposed to be present in the daytime, but I do see a lot of wasps, none of them with the red midsections the borers are said to have.
Does anyone know if this is squash vine borer damage for sure? I went ahead and harvested all the calabazas regardless of size since finding the damage, and 4 of the 9 have the holes...all in different places. Only one has the hole in the stem...the others have a single hole, like above, in the shell itself, some right in the side, one in the bottom.
All advice is welcome! I'm not sure what to do. We've thought maybe of cutting the old vine sections and pulling them and disposing of them off-property and seeing how the new vines do....or alternately, of just pulling it all up and hoeing the area to expose the soil to the sun in case there are any bad guys down in there, and replanting with a different type crop.