Hi, jdsfrance,
>>There are montains, and cold areas in Portugal, especially near Viseu or far (100 km) from the ocean. There, it happens to freeze at night even in July and August - and that kills the wasps and ruins the figs.
Freezing at night in Portugal in July and August? Only if its a very unusual year. Normally, in the Summer months we don't have any freezing temperatures, even in the coldest regions in the North. For example, today's temperatures in Viseu are 33 º C (91 ºF) highest and 18 ºC lowest (64 ºF) and similar for the next 15 days forecast - they where higher in July.
Nevertheless, you are probably right. I don't know if the wasps (the larvae at this winter stage?) can survive a cold winter even inside the protection of the figs.
If i manage to develop my caprifig cuttings and manage to get the wasps, it will be a good experiment to see how they do. The lowest temperatures over here, usually don't go below -4 ºC (25 ºF) during the coldest nights (i don't know what is the temperature inside the figs in a sheltered location in this conditions)
I wonder what's the lowest temperatures the larvae of the wasps can endure.
I know, for a fact, from a Spanish friend, that in a mountainous region in Spain called Sierra de la Contraviesa, they have a large fig production of a Smyrna type fig used for drying. And they have lots of caprifig trees about. I have to ask him what are the lowest temperatures they have there.
>>If you don't have wild figs, there might be some climatological reasons for that.
I didn't say i don't have wild figs over here. I simply hadn't found any nearby (yet i hope), at least within a 1-2 km radius, but that maybe because of the reasons i pointed out - every piece of land over here is cultivated in organized faction, no abandoned sites. And the few fig trees are all cultivated and non Smyrna types. I will search further in the next few weeks and hopefully i get lucky.
>>As I often say, I'd rather give 10 or 20 bucks for a known tree of a documented strain (still some discoveries although sometimes) than try random trees, but if you have land to try them ... and don't have other access to new fig trees . Last time I looked for a nursery in Portugal, I couldn't find one... So that didn't help .
I understand your line of thought. Rarely random trees produce good fruits.
Some nurseries (with website presence) that sell figs in Portugal (usually only within the country):
Viveiros Albar (Bacorinho, Chateaux Kennedy, Bêbera Preta, Moscatel Preto, Pingo de Mel, Nazareth, Panachee)
Viveiros Castromil (only Pingo de Mel and Bêbera Preta)
Viveiros Plantula (Lampa Preta, Maia, Princesa, Pingo de Mel, Palmares, Bêbera Branca and more - they don't sell online though)