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| Author(s): | Nilsson U., Gripwall E. |
| Year: | 1999 |
| Title: | Influence of application technique on the viability of the biological control agents Verticillium lecanii and Steinernema feltiae |
| Citation: | Crop Protection. 18:(1) 53-59. . |
Abstract:
The viability of the fungus Verticillium lecanii and the nematode Steinernema feltiae was examined after spraying with different apparatus. The viability of both V. lecanii and S. feltiae significantly decreased as the length of the pumping period in the hydraulic high-pressure sprayer increased. With increasing pressure (up to 5 103kPa) in the hydraulic sprayer the viability of V. lecanii decreased significantly. The viability of the fungus was not significantly influenced by the backpack sprayer or the coldfogger. No significant decrease in the viability of the nematodes was found after treatment with the backpack sprayer. It was difficult to obtain sufficient agitation of the spray liquid in the backpack sprayer without shaking it manually |
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