Judul: Kesesuaian Lima Jenis Komoditas Pascapanen Sebagai Media Perkembangbiakan Hama Gudang Ephestia cautella (Walker) (Lepidoptera: Pyralidae)
Abstrak: Ephestia cautella is one of major pest that attack various kinds of postharvest commodities during storage. The objective of this research was to study the suitability of cocoa beans, peanuts, rice, wheat flour, and maizena as development media for E. cautella and to know the preferences of egg laying by adults to those five commodities. One hundred eggs of E. cautella were infested into 500 g of those commodities within one liter plastic container and kept in the laboratory for 49 days. Variables observed were number of F1 emerged, development time, length and width of larvae, pupae, and adults, and the demaged they caused to the commodities. Five pairs of F1 adults then infested onto 100 g of those five commodities within insect cages and observed for number of egg laid after one week. The results showed that life cycle of E. cautella on cocoa beans, peanuts, rice, wheat flour, and maizena were 45, 49, 46, 47, 48 days, respectively. The highest number of F1 adults emerged were found on peanut. For third instar, the longest larval body were found on rice and the widest ones were found on peanuts, meanwhile the longest and widest for fourth instar larval bodies were found on cocoa beans. The longest pupal body length were found on peanuts. The average length of F1 adults were 6-7 mm and the average of wing span were 12- 14 mm. Meanwhile the highest number of egg deposited by F1 adults were found on rice and the lowest on maizena. The demaged caused by larval activity were feeding holes on cocoa beans and peanuts, meanwhile the other commodities were spun together with their silk.
Keyword: suitability., postharvest commodities, F1 population, Ephestia cautella, body size

Judul: Inventarisasi Hama Pascapanen Pada Biji Kakao (Theobroma cacao L.) di Sulawesi Selatan dan Pengendalian Araecerus fasciculatus (De Gerr) Menggunakan Kantung Hermetik
Abstrak: Globally, Indonesia is the second largest cocoa producer (849.875 metric ton in 2011) after Ivory Coast (1.6 million metric ton). Cocoa beans exported to the United States often get “automatic detention” due to insect infestation.The objectives of these research were (a) to inventory the diversity of postharvest pest of cocoa beans, (b) to develop recommendation for good storage practices using hermetic plastic bags for keeping dried cocoa beans in storage. Research was conducted in two steps: (1) field survey and (2) bioassay on the use of hermetic plastic bags to store dried cocoa beans. Field survey was conducted in the center of cocoa bean production in South Sulawesi, specifically in Kabupaten Luwu Utara, Bantaeng, Bulukumba and the City of Makassar. Hermetic plastic bags used were “Kantung Semar” and compared with polypropylene bags as control. Insect species found on cocoa bean samples from exporters warehouses were dominated Ephestia cautella, Araecerus fasciculatus, Liposcelis sp., In hermetic storage trials, 100% mortality was found on all storage time, 1, 2, and 3 months. This kind of storage system causes a decrease in oxygen content (up to 2% in 1 month, 0.9% in 2 months, and 0.5% in 3 months) and an increase in carbon dioxide (to 20% in 1 month and 22-23% in 2 and 3 months storage).
Keyword: hermetic storage, postharvest pests, cocoa, Inventory

Judul: Penyelesaian Masalah Rotasi Aliran Fluida Kental Von Karman Menggunakan Metode Homotopi
Abstrak: Von Karman equation is an equation that describes fluid viscous flow induced by infinite disk rotation. By assuming steady flow and laminar, viscous incompressible fluid flow is represented in Von Karman equation by an angular velocity and the vertical direction velocity as the independent variables. Von Karman equation is a nonlinear problem that is solved using the homotopy method. The use of homotopy method is done by defining an homotopy function that requires auxiliary parameters to control the convergent region of the solution. The solution is a recursive formula with given initial conditions. Using software based-functional shows that velocity components converge to a value.
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