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FUNGAL PARASITES OF EGGS AND CYSTS OF GLOBODERA ROSTOCHIENSIS AS
POTENTIAL BIOLOGICAL CONTROL AGENTS OF POTATO CYST NEMATODE IN
INDONESIA
Article in Journal of nematology · June 2014
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4 authors, including:
Siwi Indarti
Jaka Widada
Universitas Gadjah Mada
Universitas Gadjah Mada
29 PUBLICATIONS 42 CITATIONS
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FUNGAL PARASITES OF EGGS AND CYSTS OF
GLOBODERA ROSTOCHIENSIS AS POTENTIAL
BIOLOGICAL CONTROL AGENTS OF POTATO CYST
NEMATODE IN INDONESIA.
Indarti, S., Mulyadi, D. Widiayanto and J. Widada. Agriculture
Faculty of Gadjah Mada University, Bulaksumur, Yogyakarta
55281, Indonesia.
Globodera rostochiensis produces considerable damage in potato
production areas in Indonesia, and the infested area continues to
increase each year. Potato cyst nematodes (PCN) is difficult to
control because the cyst protects the eggs from unfavourable
environmental conditions allowing the eggs to survive for years,
and hatch only in the presence of host root exudates. The aim of
this research was to develop biocontrol agents using fungal
parasites of eggs and cysts, isolated from soil found to be
suppressive to PCN. The research was carried out in three stages:
1) identification of the soil that had the ability to suppress the
development of PCN and analysis of antagonistic activity of fungi
potentially involved in the suppression of nematode populations, 2)
isolation of fungi and testing their ability to parasitize PCN eggs
and cysts and 3) testing the effectiveness of the fungi to control
nematode populations in laboratory and pot trials, thus at
mesocosm as well as macrocosm levels. PCN infested soils with
ability to suppress PCN multiplication were found in Central Java,
Indonesia. Twelve fungal isolates with the ability to parasitise
more than 50 % of the PCN cysts and with extracellular proteolytic
activity were isolated from these locations. These fungi gave
effective control to PCN populations in laboratory and pot trials
compared to untreated treatments. The best performing isolate of
this group suppressed the PCN cyst multiplication by 2.4 times
(30.07 cysts/ 100 g soil compared with 73.53 cysts/ 100 g soil on
control or without fungal treatment). Tuber yield from treated
plants were also 1.6 times higher than the control.
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