Potential of biocontrol agents against Ganoderma lucidum causing basal stem rot in mesquite(Prosopis cineraria)in arid regions of India  

作　　者：Ritu Mawar Deepesh Sharma Ladhu Ram 

机构地区：[1]ICAR-Central Arid Zone Research Institute,Jodhpur 342003,India [2]College of Horticulture and Forestry,Jhalarapatan,Jhalawar 326001,India

出　　处：《Journal of Forestry Research》2021年第3期1269-1279,共11页林业研究（英文版）

基　　金：supported by the Core Research Grant of SERB–DST,New Delhi,Government of India。

摘　　要：This study investigates the potential of native biocontrol agents(BCAs)as controls against Ganoderma lucidum causing root rot mortality in Indian mesquite.The disease is prevalent in sandy soils where trees grow under rainfed conditions.In addition,a beetle namely A canthophorus serraticornis damages the roots,resulting in increasing vulnerability of the host thereby allowing easy of the pathogen.In dual culture tests,Ganoderma infected cowpea root bit experiment and compatibility with insecticides revealed that the three BCAs(Trichoderma longibrachiatum,T.harzianum,and Aspergillus nidulans)significantly inhibited G.lucidum mycelial growth.The highest mycelial growth inhibition(47.6%)was recorded after 96 h followed by 39.8%and 29.3%at 72 and 48 h,respectively,by T.longibrachium.Cell free filtrates of T.longibrachiatum,T.harzianum,and A.nidulans were superior in inhibiting mycelium growth.A low concentration(3 ml)of T.longibrachiatum was more effective in inhibiting mycelium growth compared to other BCAs.Both P rosopis julifl ora compost and onion residue compost amendments as food substrates favored the growth of these BCAs,which ultimately reduced the viability of Ganoderma-colonized root bits of cowpea.Studies on compatibility between insecticides and BCAs suggests that T.longibrachiatum,harzianum and A.nidulans can be combined with phorate or chloropyriphos(both organophosphates)at variable concentrations if amended together for partially infected trees,or as a prophylactic measure in healthy trees.These studies demonstrate that there is considerable opportunity for using native BCAs against G.lucidum in managing root rot disease.

关 键 词：Trichoderma longibrachiatum Trichoderma harzianum Aspergillus nidulans Prosopis cineraria Onion residues Prosopis juliflora compost 

分 类 号：S476[农业科学—农业昆虫与害虫防治]