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Authors: Karn Singh
Advisor: Mehta, Naresh
Title: Studies on the ecofriendly management of Powdery mildew (erysiphe cruciferarum opiz ex. Junell) of mustard (brassica juncea (linn.) Czern & Coss)
Publisher: CCSHAU
Language: en
Type: Thesis
Keywords: Studies, Ecofriendly, Powdery Mildew
Abstract: Powdery mildew caused by Erysiphe cruciferarum Opiz ex. Junell is one of the important disease of mustard (B. juncea (L.) Czern & Coss) growing all over the India. Disease progression was maximum during mid of March (15-3-04) on all the four varieties in all the three staggering dates of sowing when T. Max. 32.5ºC, T. Min. 12.7ºC, RHM 94.5 per cent, RHE 38.5 per cent, Avp. M 12.30mm, Avp. E 14.30 mm, Wind Speed 2km/hr and Sunshine 8.80 hrs. Disease intensity and AUDPC increased from 48-74 per cent and 326-440 respectively with delay in date of sowing. The apparent infection rate also observed higher during mid of March on all the varieties during first two dates of sowing. In third date of sowing apparent infection rate was maximum after mid of March i.e. 3 days later. Amongst nine varieties evaluated for slow mildewing components, the speck size, no. of specks/leaf, no. of conidia/speck, disease progression and disease intensity were less in the slow mildewing variety GSL-1 as compared to fast mildewing cultivars/varieties such as RH-30, RH-9801, RH-9304 RH-8812, RH-9901, RC-781 and Purple Mutant. The disease did not appear in the variety HC-9603. Maximum yield loss was recorded in the variety RH-9304 (29.47%) followed by RH-9801(26.04%), RH-8113 (23.03%) and RH-30 (19.0%) whereas average yield loss was 24.55 per cent. Among the fifty four varieties/lines tested for resistance against powdery mildew under field conditions, eleven varieties/lines viz. YSPb-24, TH-68, GSL-1, Midas, MNS-9605, HC- 1, HC-2, HC-9605, HC-9603, B. alba and Sinapis alba were observed as resistant, five varieties/line viz. Domo-4, BSH-1, TMH-50, TMH-52 and T-27 as moderately resistant to powdery mildew. Similarly, six varieties/lines such as Vaibhav, Varuna, Kranti, RLM-1359, RL- 198 and B. chinensis were susceptible and all other varieties/lines were moderately susceptible to powdery mildew. Powdery mildew can be effectively controlled by foliar application of Karathane (0.1%), Sulfex (0.2%), Salicylic acid (0.05%) and Nimbicidin (0.15%). Sulfex (0.2%) was most economical in managing the powdery mildew and gave maximum B:C ratio 6.34:1, 8.24:1 in both the varieties RH-9801, RH-9304 respectively. It was followed by Salicyclic acid 2.53:1, 3.24:1 in both the varieties RH-9801 and RH-9304 respectively.
Subject: Plant Pathology
Theme: Studies on the ecofriendly management of Powdery mildew (erysiphe cruciferarum opiz ex. Junell) of mustard (brassica juncea (linn.) Czern & Coss)
These Type: M.Sc
Issue Date: 2004
Appears in Collections:M. Sc. Dissertations

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