Evaluation of a Wettable Powder Formulation for the Nuclear Polyhedrosis Virus of Anticarsia gemmatalis

Evaluation of a Wettable Powder Formulation for the Nuclear Polyhedrosis Virus of Anticarsia gemmatalis

Evaluation of a Wettable Powder Formulation for the Nuclear Polyhedrosis Virus of Anticarsia gemmatalis

Abstract

The inÑuence of di†erent carriers on the physical and biological stability
of Baculovirus anticarsia wettable powder formulations was studied. The formulations
were obtained by mixing the puriÐed polyhedra of B. anticarsia with a
carrier and drying the suspension in a bench spray dryer. Bioassays with Anticarsia
gemmatalis HuŽ bner showed that activity was maintained with the amorphous
silica, attapulgite and kaolinite after a year of storage. In the presence of
bentonite, activity declined 50% in the same period. All formulations, except
kaolinite, maintained the physical parameters required of a good wettable
powder. Kaolinite formulation showed reduction in wettability and particle
agglomeration in storage.

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