In addition to Bacillus thuringiensis, microbiological preparations are being tested including mixtures of Bacillus thuringiensis with preparations based on mushrooms; in particular with the fungus Metarhizium anisopliae which showed, in experimental tests, a discrete activity on Hyphantria larvae (52.4% mortality in tests conducted by the Phytosanitary Consortium of Reggio Emilia, 1986).
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