Affandi 1), Dhasa Ustistio 2), Panca Jarot Santoso 1), Ellina Mansyah 1) and Dewi Sart)iami
1) Indonesian Tropical Fruits Research Institute, Solak, West Sumatra, Indonesia
2) Faculty of Agnculture and Animal Husbandry, Islamic University of Sultan Syarif Kasun. Pekanbaru, Rrau, Indonesia
3) Department of Plant Protection. Bogor Agncultural University, Bogar, West Java, Indonesia
Durian contnbutes a high economic value 1n agribusiness of horticultural product. However, recently the attack of scale insect has devastated most of pre-prccuctton trees in Indonesia. A research with objective to know the basic information about the correct speaes, orstnbution and population abundance was done at Anpan Research Station of Indonesian Tropical Fruits Research Institute from July to August 2018. A proper ldennficaucn and observation method were used to know the species identity, distribution and abundance of the insect. Biotic and abronc factors in each done such as nutnents content, tree morphological charactensuc, hght intensity, temperature and relative humidity under canopy were analysed. The result showed that Aulacasp1s v1lts Green was a scale insect identified associating with durian leaves. Clone Bintana and Sikapal were the most and the less preferred wit the intensity of damage was 88.60 % and 38.30%, respectively. Nutnent content especially nitrogen and water as well as canopy morphology were simultaneously the most contributed m the preference of a certain clone. The pest was preferred to dump m the East cardinal direction and no significant drfference between upper and lower part of the tree includmg within and outside of the canopy.
AGRIVITAJoumal of Agricultural Science. 2019 42(2)· 1-2