In Yucca  pollination is carried out by a moth Tegeticula. Which type of pollination is observed in the Yucca plant due to its association with the moth?

Female Tegeticula visits the flowers of Yucca during night time. At first it collects the pollen under its head, later inserts its ovipositor into its ovary and lays eggs in the ovary. Later it climbs up the pistil reaches the stigma and pushes the pollen ball into the stylar canal to ensure pollination and later fertilisation. It is obligate symbiotic relationship between Yucca and Tegeticula.