Nurul Dwi Handayani
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Etil Format sebagai Perlakuan Alternatif terhadap Colletotrichum gloeosporioides pada Stroberi Syahputra, Ade; Handayani, Nurul Dwi; Malvini, Indriani Kusumawati Daud
Jurnal Fitopatologi Indonesia Vol 8, No 6 (2012)
Publisher : Jurnal Fitopatologi Indonesia

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Abstract

Ethyl formate (EtF) is alternative fumigant to substitute methyl bromide. The objective of the current study was to obtain an effective dose and exposure time of Etf treatment against Colletotrichum gloeosporioides in strawberry. In vitro test was conducted on colonies of C. gloeosporioides grew on PDA in petri dishes. The fungus was fumigated with Etf at various dose (0, 140, 190, 240, and 290 g m-3) and at various exposure time (1, 2, 3, and 4 hours), in 5 L plastic bags. On in vivo test, agar plugs of C. gloeosporioides (diameter 0,3 mm) were inoculated on to wounded strawberries, and the inoculated strawberries were then fumigated with Etf at similar dose and exposure time treatments. Each test was conducted in four replicates. Fumigation with Etf at 190 g m-3 significantly reduced the growth of C. gloeosporioides on agar, but did not reduce the colonization of the pathogen on strawberries. Ethyl formate did not affect visual quality of strawberries, but damaged the calyx at 190 g m-3. Other fungi, namely Colletotrichum sp. and Botrytis sp., were found on fumigated and nonfumigated strawberries.  Key words: Colletotrichum gloeosporioides, ethyl formate, strawberries 
Perlakuan Udara Panas untuk Pengendalian Perkecambahan Spora Tilletia indica pada Gandum Handayani, Nurul Dwi; Setyawan, Taufan Tanto; Salbiah, Salbiah; Wahyuno, Dono; Sinaga, Meity Suradji
Jurnal Fitopatologi Indonesia Vol 14, No 1 (2018)
Publisher : The Indonesian Phytopathological Society (Perhimpunan Fitopatologi Indonesia)

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Abstract

Karnal bunt of wheat (Triticum aestivum) caused by Tilletia indica is a major concern in international trade because it can degrade quality significantly, and it is a quarantine pest for Indonesia. Tilletia infected seeds can be the source of fungal inoculum of other areas. The current research was aimed to determine the effectiveness of temperature and exposure time to control Tilletia using air heat treatment without reducing the quality of grain. The experiments were conducted in vitro, initiated by seed testing, including morphology-based detection and identification of Tilletia followed by a viability test of the seed. Air heat treatment was performed by adjusting the oven temperature at 75, 80, 85 °C and 28 °C (control) for 4 and 6 hr exposure time, each with three replications. The results showed that air heat treatment of the wheat at 75 °C for 4 hr was able to suppress teliospores germination of 56.7–61.7%, without denature protein content of the wheat.