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VOLUME 27 NUMBER 1 APRIL 1989

CONTENTS

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Purkayastha, R. P.: Modern approaches to biocontrol of crop pathogens and their implication 1
Datta, D..K & Samaddar. K. R.: Induction of phytoalexin in rice bean by infection, metabolic inhibitors, and irradiation 7
Bhattacharjee, M. K, Samajpati, N, & Chilvers. G. A.: Studies on the effect of different amounts and methods of applying spawn on the yield of Pleurotus sajor-caju (Fr.) Singer 15
Chattopadhyay. S. B, & Khatua. D. C.: Relation of plant type with disease resistance against bacterial leaf blight of rice 25
Singh, R. D. N. & Kaiser S. A. K. M.: Seed treatment with Bavistin on the incidence of turcicum leaf blight of maize at pretassel stage 31
Das, Ashok Kumar: Two new species of Cercospora from India 37
Sarbajna, K. K.: Some new combinations into the Genus Pseudocercospora Speg., from West Bengal 43
Verma, A. K., Basu, D., Nath, P. S. Das. S., Ghatak. S. S. and Mukhopadhyay, S.: Relationship between the population of White-Fly, Bemisia tabaci Genn. (Homoptera: Aleyrodidae) and the incidence of tomato leaf-curl virus disease 49
Datta, Krishnendu: Three wood-inhabiting Pyrenomycetes of Garumara forest (W.B.) 53
Bhattacharjee, M. K. & Samajpati, N.: Optimization of mycelial growth of Pleurotus sajor-caju (Fr.) Singer in relation to some physical and nutritional factors 59
Phukan, S. N. & Baruah, C. K. : Studies on the distribution pattern of fungi on two surfaces of potato leaves in relation to incidence of Phytophthora infestans (Mont.) De Bary. 67
Singh, Kulvinder. Aneja K. R. & Mehrotra, R. S.: Effect of DDT and BHC on the growth of two aquatic fungi 73
Chaudhuri, J., Majumdar, M, Kumar, A. K. & Chattopadhyay, T. K.: Antifungal activity of Di (Tri) organotin aryloxyacetates 79
Chattopadhyay, A. K. & Bagchi, B. N.: Occurrence of club root disease on rapeseed mustard in West Bengal 83