Name : Firman Alimusaffa
NIM : 201510601097
Title : Pathogens in Seeds
Type : Resumes
1. The fungus C. kikuchii
This fungus attacks soybean plants causing Cercospora blight leaf spot disease
(Mengistu et al. 2012). Another disease caused by this bacterium is purple seed
disease which is often also known as purple blight, purple spot, purple spot, or
lavender spot (Soesanto, 2015). Typical symptoms seen on the seeds, namely there
are stains from pink to purple. Severe infection causes almost the entire surface of the
seed to turn purple. Germination of infected seeds is reduced. Infected seeds are
potential inoculums. In the field, the fungus can infect leaves, stems and pods.
Figure 1. Purple spots on soybean seeds, sprouts infected with C. kikuchii fungus, and
symptoms of purple spot disease on leaves. (Source: McGee and Nyvall 2008)
Control:
Crop rotation with non-host crops.
Planting of plant residues.
Keeping the land clean.
Seed treatment with active kaptan fungicide.
Application of fungicide with the active ingredient mancozeb.
2. SMV (Soybean Mosaic Virus)
Diseases caused by SMV virus particles have symptoms that appear depending on
the virus stain, soybean variety, plant age, and growing environment. The
characteristics of SMV infection are rather stiff leaves, dark green and yellowish
veins around the veins, stunted, curly leaves and downward curved leaves
(malformations).
Soybean infection by SMV in the vegetative phase of plants aged 10 days,
reduced seed yield 29-41%. Yield reduction is lower when the infection occurs at an
older age (50 days) by 2.5-4.5%. The source of SMV can come from infected seeds
(seed borne). Transmission of SMV through seeds reaches 8% (Rahayu 1989;
Sunartiningsih 1991). Andayanie (2012) stated that SMV was detected in soybean
seeds planted in Ngawi and Madiun (East Java).
NIM : 201510601097
Title : Pathogens in Seeds
Type : Resumes
1. The fungus C. kikuchii
This fungus attacks soybean plants causing Cercospora blight leaf spot disease
(Mengistu et al. 2012). Another disease caused by this bacterium is purple seed
disease which is often also known as purple blight, purple spot, purple spot, or
lavender spot (Soesanto, 2015). Typical symptoms seen on the seeds, namely there
are stains from pink to purple. Severe infection causes almost the entire surface of the
seed to turn purple. Germination of infected seeds is reduced. Infected seeds are
potential inoculums. In the field, the fungus can infect leaves, stems and pods.
Figure 1. Purple spots on soybean seeds, sprouts infected with C. kikuchii fungus, and
symptoms of purple spot disease on leaves. (Source: McGee and Nyvall 2008)
Control:
Crop rotation with non-host crops.
Planting of plant residues.
Keeping the land clean.
Seed treatment with active kaptan fungicide.
Application of fungicide with the active ingredient mancozeb.
2. SMV (Soybean Mosaic Virus)
Diseases caused by SMV virus particles have symptoms that appear depending on
the virus stain, soybean variety, plant age, and growing environment. The
characteristics of SMV infection are rather stiff leaves, dark green and yellowish
veins around the veins, stunted, curly leaves and downward curved leaves
(malformations).
Soybean infection by SMV in the vegetative phase of plants aged 10 days,
reduced seed yield 29-41%. Yield reduction is lower when the infection occurs at an
older age (50 days) by 2.5-4.5%. The source of SMV can come from infected seeds
(seed borne). Transmission of SMV through seeds reaches 8% (Rahayu 1989;
Sunartiningsih 1991). Andayanie (2012) stated that SMV was detected in soybean
seeds planted in Ngawi and Madiun (East Java).
