Infestation of Dendrophthoe pentandra (L.) Miq. on Various Canopy Shading and Plants Diversity in Purwodadi Botanic Garden, Indonesia: A study on Cassia fistula L.

Abstract

Mistletoe Dendrophthoe pentandra (L.) Miq. is a parasitic plant commonly found parasitizing and infesting medicinal plants such as Cassia fistula L. This research aimed to investigate the infestation of D. pentandra on C. fistula on various trees canopy shading, infested host number, and plant diversity. The study was conducted in Purwodadi Botanic Garden which is located in Purwodadi, Pasuruan, East–Java, Indonesia from January to March 2020. Data collection was conducted by explorative and descriptive methods in each block location in the garden. Sampling plots were determined by the purposive sampling method using 20 × 20 m plot−1 in each block where the tree of C. fistula found. The canopy shading was categorized as: open (iv) = light interception > 90 %, rather open (iii) = light interception = 60 % to 90 %, rather shady (ii) = light interception 30 % to 60 %, shady (i) (light interception < 30 %). The result showed that the infestation of D. pentandra was affected significantly by the plant canopy shading and the infested host number in the blocks. The highest infestation of mistletoe D. Pentandra on C. fistula was found in the open canopy and the highest infested host plants in the block III.D with the parasite number 13 plant−1 . The tree plant diversity in the blocks tend to have negative correlation to the infestation of D. pentandra on C. fistula with r = −0.18.