Rhynchophorus ferrugineus came here with phytosanitary certified palms to give you an idea on how accurate and safe we are with certified plants...I treat plants according to pests in country of origin regardless of certifications and quarantine till i am sure they are free from such pests
Borers are hard to check for accurately as are important disease causing fungi,bacteria and virus in bareroot and otherwise healthy appearing plants. Only quarantine and time allows it to become apparent wether a plant is free from such diseases unfortunately. I have gotten some certified orchids with nasty bacterial diseases in the past too. To the incinerator they went as have bananas with BSV.