Sankyo Company, Limited

Ube Industries, Inc.

Akira Nishida

Kazuo Sato

Toshiaki Yanai

Anthony Cornelius O'Sullivan

Bruno Frei

Keiji Tanaka

Toshimitsu Toyama

Takao Kinoto

Tokio Obata

Noritoshi Kitano

Shinji Yokoi

Kouichi Goka

Combinations of the known compound pyrimidifen with phosphorus-containing pesticides have a synergistic pesticidal effect, especially against mites.

Pesticidal combinations

Compounds having a 16-membered macrolide ring, and related to the milbemycins and avermectins, with substituents at positions 5.13, 25 and optionally also 23, have acaricidal, insecticidal and anthelmintic properties. They are useful for treating various pests in plants and animals.

Macrolide compounds, their preparation and their use

Compounds having a 16-membered macrolide ring, and related to the milbemycins and avermectins, with substituents at positions 5, 13, 25 and optionally also 23, have acaricidal, insecticidal and anthelmintic properties. They are useful for treating various pests in plants and animals.

Derivatives of milbemycins D, A.sub.3 and A.sub.4 and of the corresponding sec-butyl compound have a halogen atom at the 13-position; at the 5-position, they have an oxygen (keto) atom, an oxime group or a substituted oxime group. They may be prepared from known compounds by any appropriate combination of halogenation, ketonization and oximation.

13-Halomilbemycin derivatives, their preparation and compositions

8,9 and/or 14,15 epoxidized and 5-acylated milbemycins and avermectins are prepared from the parent milbemycins and avermectins by epoxidation and acylation (in either order). They have enhanced anthelmintic, acaricidal and insecticidal activities.

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Shiga, Japan

Akira Nishida