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Yusof Ibrahim, . Acarina Tetranychus urticae Koch complex: a higher value plant pest. pp. 5-7. ISSN 0128-9322
Yusof Ibrahim, . and Tan Gek Kiang, . and Cheong Chee Kong, . Laboratory and field evaluation of selected isolates of Metarhizium anisopliae and Beauveria bassiana against the leaf beetle Epilachna indica Mulsant. 15-. ISSN 0128-9322
Abd Ghani Ibrahim, . and Yusof Ibrahim, . and Gurchan Singh, . and Hor Yue Luan, . and Mohammad Md Ali, . and Anuar Abd Rahim, . and Othman Yaakob, . and Mohd Ismail Abd Karim, . The fruit industry: need for more research Malaysia. pp. 8-9. ISSN 0127-8436
Yusof Ibrahim, . and Dzolkhifli Omar, . and Adnan Othman, . The toxicity of acaricides and synthetic pyrethroids against red spider mite Tetranychus urticae Koch Complex. pp. 31-35. ISSN 0126-6128
Shari Fuddin Sha'ari, . and Yusof Ibrahim, . (2007) Potential use of microbes as biological control against the cocoa pod borer Conopomorpha cramerella. [Proceedings Paper]
Norzita Hashim, . and Yusof Ibrahim, . and Tan Y. H., . (1999) Entomopathogenicity of Beauveria bassiana against the cabbage caterpillars Plutella xylostella and Crocidolomia binotalis Lepidoptera: Yponomeutidae; Pyralidae. [Proceedings Paper]
Rajan A., . and Yusof Ibrahim, . (1994) Plant protection in the tropics : proceedings of the fourth international conference on plant protection in the tropics. Malaysian Plant Protection Society, Kuala Lumpur Malaysia. ISBN 967-9942-17-1
