Hari Selasa tanggal 15 Maret 2011 kemarin saya, Pak Benito Heru Purwanto, Bu Sri Nuryani, dan Pak Eko Hanuddin menghadiri Simposium Internasional pertama tentang pengelolaan tanaman sayur-sayuran yang berkelanjutan di Universitas Kristen Satyawacana Salatiga (silakan lihat di http://www.ishs.org). Lumayan, saya mendapatkan banyak sekali tambahan wawasan dari ahli-ahli bidang lain, terutama dari disiplin ilmu tanah. Keren-keren banget lho ilmu mereka!
Oya, sebagai oleh-oleh saya sertakan bahan presentasi saya. Silakan unduh disini. Abstraknya saya tulis sebagai berikut.
Potency of composted Siam Weed to control the population of herbivore insects in Chinese cabbage
Nugroho Susetya Putra1), Benito Heru Purwanto1), Dwi Suci Rahayu2)
1)Faculty of Agriculture, Gadjah Mada University, Jl. Flora Bulaksumur, Yogyakarta 55281
2)Indonesian Coffee and Cocoa Research Institute, Jl. Jendral Sudirman, Jember 68118
Siam weed, Chromolaena odorata (Spermatophyta, Asteracea) is widely known as serious weed in tropical regions, mainly for its fast-and-massively spreading onto new opening habitat and strongly competing with the main crops. However, in recently years, some studies have revealed positive effects of composted Siam weed as soil amendment as well as being an eco-friendly insecticide. However, so far, there was a very little study to show the bottom-up effect of composted Siam weed on both crop and its associated arthropods. Our study showed that composted Siam weed enabled to maintain the population of herbivores as well as to reduce their negative impacts on Chinese cabbage. The enhancement of crop’s performance influenced by compost and suppression by carnivores controlled the population of herbivores. The bottom-up and top-down mechanisms of our system was discussed.
Key words: Arthropods, Chinese cabbage, Chromolaena odorata, Siam weed, soil amendment.
Nugroho S. Putra