• The International Journal of Biological Research (TIJOBR)- Published Quarterly
  • The International Journal of Global Sciences (TIJOGS) -Published Quarterly

Characterization of Environmental Factors Conducive for Ascochyta Blight of Gram and its Chemical Management

The International Journal of Biological Research (TIJOBR)


Safoora Asjad1, Safdar Ali1, Amer Habib1, Muhammad Muntazir Mehdi Khan1*, Ahsan Abdullah1, Anosh Razzaq1, Muhammad Jabran1, Abdul Wahid1, Junaid Asghar1

*Corresponding author: mehdikhanniazi92@gmail.com

Submitted Accepted Published
Oct 01,2018 Feb 07,2019 Feb 12,2019

2019 / Vol: 2 / Issue: 1


Gram (Cicer arietinum L.) is an important pulse crop belongs to family Fabaceae. Gram is cultivated worldwide including Europe, Africa, Asia, Australia, South and North America. It is third important pulse crop in world and had great economic importance. It is main source of protein in subcontinent and is grown well even in poor and sandy soil. Gram is vulnerable to many biotic and abiotic stresses. Among the biotic stresses, gram blight that was caused by Aschochyta rabiei which causes severe losses. Favorable environmental conditions further enhance the disease. The present experiment was focused on the management of ascochyta blight by application of chemicals and studied the environmental conditions that cause the disease to spread more. For this purpose, three fungicides were tested in-vitro and best were sprayed in the field. In screening trial four varieties were used. Environmental conditions influence the spread of disease. The disease predictive model was developed for study the influence of environmental variables. A field trial was conducted in research area of Department of Plant Pathology, University of Agriculture, Faisalabad. The experiment following randomize complete block design (RCBD) and the treatments were analyzed statistically by using LSD test. In vitro evaluation of chemicals Gemstar super 325 SC Azoxystrobin+Difenoconazole, Nativo 75 WG, Allete 80%WP was used. Among these Gemstar super 325 SC Azoxystrobin+Difenoconazole and Nativo 75 WG completely inhibits the fungal growth while Allete 80%WP reduces growth when compared to the control. Among the four varieties no one is resistant but 07005 show moderate resistances while others are susceptible to disease. The disease predictive model were developed Y=81.42-122 X1, Y = 73.38 - 1.589 X2, Y = 14.98 + 0.710 X3, Y = 47.42 + 4.87 X4. Where Y= Ascochyta blight, X1= Maximum temperature, X2= Minimum temperature, X3= Relative humidity, X4= Rainfall. All are significant at P<0.05 but negative correlation was observed between maximum temperature (R2=49.56) and minimum temperature (R2=51.49) as the temperature increase the disease decrease but relative humidity R2= (53.16) and rainfall R2= (35.72) was positively correlated with disease. Among the treatments Gemstar super 325 SC Azoxystrobin+Difenoconazole was the best one and show significant response in reducing disease. 

Key words: Gram (Cicer arietinum L.), gram blight


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