Informatics Publishing Limited

S. N. Zagade ¹, G. D. Deshpande ¹, D. B. Gawade ², S. V. Pawar ²

Affiliations
1 Department of Plant Pathology, College of Agriculture (M.A.U.), Parbhani M.S., IN
2 Department of Plant Pathology, Division of Crop Protection, V.S.I., Pune M.S., IN

Abstract

Chilli crop is attacked by more than dozen diseases of fungal, bacterial and viral nature leading to great loss to cultivators. Among those diseases, damping off of chilli incited by Pythium spp. is responsible for 90 per cent mortality either as pre or post-emergence damping off in nurseries and field conditions. Results indicated that the pre-emergence damping off was responded with significantly lowest seed rot found in PATH-34 (42.4 %) and this variety was at par with PATH-32 (60.3 %), PATH-24 (60.3%), PATH-9 (61.1%), PATH-7 (60.02%), PATH-6 (65.00 %) and PATH-26 (65.0%). Significantly highest seed mortality was noted in 58 entries where number of rotten seeds ranged from 69.6 to 96.7 per cent. Significantly higher germination in sick soil was PATH-34 (28.63 %), PATH-9 (16.41%), PATH-24 (15.61%), PATH-32 (15.61 %), PATH-6 (11.71 %), PATH-7 (11.71%) and PATH-26 (11.71%). While 58 entries have significantly less germination in sick soil. However, the post-emergence damping off the genotypes PATH-6 (22.86%), PATH-9 (22.86%) and PATH-34 (22.86%) were resistant (R) reaction with seedling mortality and the moderately resistant (MR) reaction of seedling mortality were PATH-24 (40.16%), PATH-32 (40.06%), PATH-30 (36.17%) and PATH-07 (31.46%). The 12 germplasm lines expressed moderately susceptible (MS) reaction having post-emergence mortality from 40.2 to 56.8 (%). The 18 germplasm lines expressed susceptible reaction (S) having 56.9 to 73.4 (%) post emergence mortality. The highly susceptible reaction (HS) was expressed by 28 entries having post-emergence mortality from 73.5 to 90 (%).

Keywords

Damping Off, pythium Ultimum

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A. A. Chavan ¹, G. D. Deshpande ¹, S. N. Zagade ¹, P. K. Mane ¹

Affiliations
1 Department of Plant Pathology, College of Agriculture, Marathwada Agricultural University, Parbhani (M.S.), IN

Abstract

Tomato crop face the problem of pre-emergence damping off and post emergence damping off, reducing production of tomato crop. Damping off of seedlings in crop is caused by a group of fungi belonging to class oomycetes amongst which Pythium species are most important. There are two clear phases of the damping off i.e. pre-emergence and post-emergence.

Keywords

Phythium ultimum, Host Plants, Seedling Mortality.

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A. A. Chavan ¹, G. D. Deshpande ², S. N. Zagade ²

Affiliations
1 Rajiv Gandhi Agriculture College, Parbhani (M.S.), IN
2 Department of Plant Pathology, Marathwada Agricultural University, Parbhani (M.S.), IN

Abstract

In varietal screening by sick soil method, Arka Vikas, ATV-2, CO3, DARL-62, DT-II, Shalimar, KS-229, Parbhani Yashshri, Pusa Rabi and Vaishali varieties have been taken for research study. By sick soil method Parbhani Yashshri responded with significantly less seedling mortality and was at par with Pusa Ruby, KS-229 and CO-3, Arka Vikas and ATV-2.

Keywords

Pythium ultimum, Varietal Screening, Pathogencity.

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