SEDL / STP / STP875-EB / STP32863S

Control of Spruce Budworm by Ultra-Low-Volume Application of an Insecticide Suspension

Shafer, JG
Mobay Chemical Corporation, Kansas City, MO

Pages: 10    Published: Jan 1985

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Abstract

The spruce budworm, a native insect in the Eastern United States and Canada, can cause defoliation severe enough to kill a tree within a year. For a number of years, Matacil has been used to control the insect. The formulation is a true solution containing 180 g of Matacil per litre (1.5 lb/gal). It is mixed with diesel oil and applied ultralow volume (ULV).

It was desired to have a formulation that could be mixed with water as well as oils. This was accomplished by changing the formula from a true solution to a suspension in oil. The suspension can be mixed directly with oil or after addition of an emulsifier, with water.

Biological efficacy data supported the formula change. Spray patterns and droplet size counts showed that ULV application of the suspension by fixed-wing aircraft was feasible.