Parajubaea Cocoides je najosjetljivija parajubaea na vrućine. Ostalim parajubaeama te naše vrućine nebi toliko smetale, ali ova je jako osjetljiva na njih.
Ona je u našoj klimi granična kao palma zbog ljeta.
Za Cocoides sve poviše 30°C je opasno. ( ako dugo traje ) A prestaje sa rastom već na 25°C.
A mi na Jadranu i većina mediterana smo puno topliji ljeti nego Novi Zeland i Kalifornija ( najviše zbog noćnih temperatura ).
Kalifornija je dosta hladnija po noći od nas. Temperature tamo tijekom noći usred ljeta znaju pasti na 9°C, u sjevernoj Kaliforniji i niže, pa onda opet ugrije danju.
Kod nas nisu problem samo ljetne dnevne vrućine, nego i noćne. Mi smo ljeti i po noći vrući. Pa će to za ovu palmu biti još veći stres.
A zbog toga jer smo na sjevernijoj zemljopisnoj širini, i naš dan je duži ljeti nego u Kaliforniji.
Tako da će za ovu moju, tek nadolazeće ljeto biti prava kušnja. Sa godinama kako rastu a kruna im se podiže više u zrak, postaju sve osjetljivije na vrućinu.
Evo ovdje malo više o tom njihovom problemu i nagloj smrti.
http://www.cloudforest.com/cafe/species/parajubaea-cocoides-t4177.htmlP. cocoides was very popular in NZ about 20 years ago, but almost all the original trees have died. A decline syndrome sets in some years after flowering commences, and the palms seem to flower themselves to death, producing more and more infloresences and less leaves. Occaisonally also there have been cases of major crown collapse, huge pieces of otherwise healthy looking crown falling out and the palm dying. No one wants to grow this tree in NZ anymore.
Last picture I saw of Darold Pettys tree looked like it is suffering the same decline as the NZ trees. There is a strong warning on this species! How many fully mature trees are there in SF Bay area? By fully mature, I mean trees that have been successfully producing seeds for more than 10 years without sign of decline?
No one seems to know why they die, but there is a lot of speculation. I have a pet theory which I hope is wrong.
So far the decline syndrome has not been seen in NZ grown sunkha, torallyi or microcarpa as far as I know, despite some of the oldest trees being almost as old as cocoides.
