Siahaan, Parluhutan and ., Saroyo and Langoy, Marnix L.D.
(2018)
Evaluation of the Adaptability of Several Soybean Varieties (Glycine max)
due to Global Climate Change in Facing the Attack of Bean Stem Maggot,
Ophiomyia phaseoli (Diptera: Agromyzidae).
In: IORA International Conference on Operations Research, September 20-21, 2018, Manado, Indonesia.
Abstract
One of the constraint factors in increasing soybean production is the problem of bean stem maggot,
Ophiomyia phaseoli (Diptera: Agromyzidae). One effort that can be done to overcome this armyworm
is to look for soybean varieties that can adapt to the environment in North Sulawesi and have resistance
to bean stem maggot attacks. The purpose of this study was to find and test soybean varieties that were
able to reduce the preference and attack of bean stem maggot on these plants. There are 3 varieties to
be tested, namely willis, anjasmoro, and gepak ijo varieties. The parameter that will be measured in the
preference test is the number of larvae that choose each given variety. Parameters measured for testing
the level of attack are the number of leaves and leaf area eaten by bean stem maggot in each variety.
The experimental design used CRD (completely randomized design) and analyzed with Anova (analysis
of variance) which was then tested with the LSD (least significant difference) test if there is variation
between treatments. After conducting the research, the results of the preference test showed that the
Anjasmoro variety had the smallest number of larvae, namely an average of 6.4 which was significantly
different from the larvae found in the Willis variety, which was an average of 7.6 larvae and also
significantly different from the Gepak ijo variety which had the average number of larvae was 9.2
larvae. The results of the attack intensity test showed that the Anjasmoro variety had the smallest attack
intensity, which was an average of 28.02% but was not significantly different from the attack intensity
found in the Willis variety, which was an average of 16.46%, but these two varieties were significantly
different from the attack intensity of the Willis variety. Gepak ijo which has an attack intensity of
52.68%. Based on the results of this research, the soybean that can be suggested for planting by farmers
is the Anjosmoro variety because it has a lower level of preference than the Willis and Kepak ijo
varieties and also has a lower intensity of attack than the green kepak variety.
Keywords: Ophiomyia phaseoli, resistance, soybean.
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