The first observation of the yucca moths was made by George Engelmann in St. Louis in 1872 (Engelmann, 1872). Yucca seeds provide the only food for the yucca moth larvae, so they need the plant to survive. The yucca moth is well-known for its co-dependant relationship with the yucca plant. Moth larvae feed only on Soapweed seeds, and in turn the Soapweed is only able to produce seeds if the plant is pollinated by Yucca Moths. So we invite you to find a yucca, and pull up a chair. The moth cannot complete the life cycle without the yucca plant. Both pollinating yucca moth (Tegeticula) and bogus yucca moth (Prodoxus) abundance increase with density of live Joshua trees. [xiv] Robert H. Webb et al,“Dynamics of Mojave Desert Shrub Assemblages in the Panamint Mountains, California,” Ecology , … The yucca plant … Both Yucca plant and the moth cannot complete their life cycles without each other. Tegeticula is commonly known as the yucca moth. The yucca-yucca moth relationship was first described in 1872 by pioneering entomologist Charles Valentine Riley, and has since become a literal textbook example of symbiosis. The female yucca moth acts as the pollinator of the yucca plant. The larvae of the moth come out of the eggs as the seeds start developing. At the highest tree density, moth abundance was low despite high tree abundance; this was the highest elevation site at 2212 m (site 11), which had no successful sexual reproduction. The best time to view moths in yuccas is just after sunset. The state flower of Mexico owes its existence to insects. Engelmann asked Charles Ril-ey, then state entomologist of Missouri, to explore the relationship between the moths and the plants. If a biologist were to experimentally add 12 moth eggs to a yucca flower, what would be the most likely result? The moth lay their eggs at the base of the flower where seeds are present. It is a balanced relationship – the moth pollinates the plant and in exchange the plant provides food for the moth. Since the larva develops into a moth that pollinates the yucca plant, the relationship is clearly beneficial to both partners. Answer: The realtion b/w moth and yucca plant is known as mutualism,becoz both Moth and Yucca plant benefit each other. Yucca moths typically lay about six eggs in a yucca flower. The yucca plant, which Native Americans used to make baskets, has a mutualistic relationship with the yucca moth. By comparison, the relationship between the Mexican jumping bean (Sebastiana pavoniana) and its symbiotic moth (Laspeyresia saltitans) is clearly one-sided. The yucca moth’s larvae rely exclusively on the seeds of the yucca plant as a primary food source, and the plant relies exclusively on the yucca moth for pollination. These moths are specific pollinators for the plant and the plant cannot survive without them. 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