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Critical competition period of Parthenium hysterophorus L. in spring maize (Zea mays L.) Planta Daninha
Rehman,Abdul; Qamar,Rafi; E. Safdar,Muhammad; ,Atique-ur-Rehman; M.R. Javeed,Hafiz; Maqbool,Rizwan; Farooq,Naila; Shahzad,Muhammad; Ali,Mazhar; H. Tarar,Zahid.
Abstract Background: Parthenium hysterophorus L., commonly known as parthenium weed, poses severe economic and environmental hazards to the agro-ecosystems of Pakistan. Objective: To estimate the yield loss and critical competition period of this weed in the spring sown maize crop. Method: Field studies were conducted at an agronomic research area in the College of Agriculture at the University of Sargodha in Punjab-Pakistan during two consecutive year spring seasons (2014 and 2015). Treatments were comprised of viz., control plots (weed free), and parthenium competition durations of 2, 3, 4, 5 and 6 weeks after crop emergence (WAE), as well as weedy check for the full growing season of the crop. Results: Study results showed that the prolongation...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Competition duration; Parthenium; Spring maize; Yield loss; Logistic model.
Ano: 2020 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582020000100327
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Determination of lytic enzyme activities of indigenous Trichoderma isolates from Pakistan BJM
Asad,Saeed Ahmad; Tabassum,Ayesha; Hameed,Abdul; Hassan,Fayyaz ul; Afzal,Aftab; Khan,Sabaz Ali; Ahmed,Rafiq; Shahzad,Muhammad.
Abstract This study investigated lytic enzyme activities in three indigenous Trichoderma strains namely, Trichoderma asperellum, Trichoderma harzianum and Trichoderma sp. Native Trichoderma strains and a virulent strain of Rhizoctonia solani isolated from infected bean plants were also included in the study. Enzyme activities were determined by measuring sugar reduction by dinitrosalicylic acid (DNS) method using suitable substrates. The antagonists were cultured in minimal salt medium with the following modifications: medium A (1 g of glucose), medium B (0.5 g of glucose + 0.5 g of deactivated R. solani mycelia), medium C (1.0 g of deactivated respective antagonist mycelium) and medium D (1 g of deactivated R. solani mycelia). T asperellum showed presence...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Lytic enzymes; Mycoparasitic activity; Rhizoctonia solani; Trichoderma.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822015000401053
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