Preceding Crops Affect the Growth and Mycorrhizal Colonization of Gladiolus (Gladiolus grandiflorus sect. Blandus) cv. Aarti under Biotic Stress of Fusarium oxysporum f. sp. gladioli (Massey) Snyd. & Hans

Issue Date

3-2010

Abstract

Fusarium oxysporum f. sp. gladioli (Massey) Snyd. & Hans is the cause of corm rot disease of gladiolus. The present study was carried out to investigate the effect of eight preceding crops, viz. Allium cepa L., Brassica campestris L., Capsicum annuum L., Eruca sativa Mill., Helianthus annuus L., Tagetes erectus L., Triticum aestivum L. and Zea mays L., on corm rot disease, growth and mycorrhizal colonization of gladiolus (Gladiolus grandiflorus sect. Blandus) cv. Aarti under biotic stress of F. oxysporum f. sp. gladioli. These crops were sown in pots, harvested after 75 d and the soil was inoculated with F. oxysporum inoculum at 4 g 400 g-1 soil using chickpea (Cicer arietinum) seeds as inoculum carrying material. Gladiolus was subsequently cultivated in these pots. Data regarding the various growth parameters and arbuscular mycorrhizal (AM) colonization of gladiolus were recorded after 120 d. Disease incidence was significantly suppressed in all the preceding crop treatments (29-53%) compared with 70% in the positive control (Fusarium inoculation without any preceding crop). In general, root biomass was enhanced while shoot biomass was suppressed due to various preceding crops under Fusarium stress. Mycorrhizal colonization was significantly suppressed due to F. oxysporum inoculation. However, percentage mycorrhizal colonization was significantly enhanced under biotic stress of F. oxysporum when gladiolus was cultivated in the same pot soil after harvest of the preceding test crops. Maximum stimulatory effect was observed in the treatment where either Z. mays or A. sepa was cultivated as preceding crop.

Source or Periodical Title

Philippine Agricultural Scientist, The (Formerly: The Philippine Agriculturist)

ISSN

0031-7454

Volume

93

Issue

2

Page

135-141

Document Type

Article

College

College of Agriculture and Food Science (CAFS)

Frequency

quarterly

Physical Description

graphs; references

Language

English

Subject

arbuscular mycorrhizae, corn rot disease, Fusarium, oxysporum, gladiolus, preceding crops

En – AGROVOC descriptors

GLADIOLUS GRANDIFLORAS; FUSARIUM OXYSPORUM; ALLIUM CEPA; BRASSICA RAPA; CAPSICUM ANNUUM; ERUCA VESICARIA SUBSP. SATIVA; HELIANTHUS ANNUUS; TAGETES ERECTA; TRITICUM AESTIVUM; ZEA MAYS; MAIZE STALK ROT; ARBUSCULAR MYCORRHIZA; PLANT GROWTH; CROP MANAGEMENT

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