Ketahanan Genotipe Kedelai Terhadap Hama Pengisap Polong, Riptortus linearis F. (Hemiptera: Coreidae)

Ayda Krisnawati, Marida Santi Yudha Ika Bayu, dan Mochammad Muchlish Adie

Abstract


The brown stink bug, Riptortus linearis, is the most dominant of soybean pod sucking pest in Indonesia. The objectives
of the study were to identify the resistance of soybean genotypes against brown stink bug and to determine the relationship of
agronomic characters with the intensity of pod and seed damages. Research was conducted at Balitkabi (Malang, Indonesia)
from April to August 2018. Thirteen genotypes were assessed for their resistance to brown stink bug under choice and nochoice
tests. A randomized block design was carry out with three replicates. The number of punctures on seed, seed and pod
damages intensity on no-choice test was higher than those under choice test. Under choice test, the pod damage ranged from
19.40-41.68% (average of 29.51%), and the seed damage ranged from 19.31-39.90% (average of 26.80%). Under no-choice
test, the pod damage ranged from 25.77-43.58% (average of 37.41%), and the seed damage ranged from 21.30-58.29%
(average of 34.27%). The 11AB and 19BE showed consistently resistant based on pod and seed damage under the choice
test. Under no-choice-test, 19BE showed consistently resistant. The path analysis showed that an increase in the number of
seeds will possibility increase the number of punctures on the seed and then contribute to the increase of yield losses. The
19BE which showed consistently resistant to brown stink bug was recommended to be further tested in the adaptation trial
and released as superior variety.


Keywords


agronomic character, choice test, damage intensity, no-choice test

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DOI: https://doi.org/10.24831/jai.v47i2.25514

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