A comparison of the performance and biological efficiency of new knapsack sprayers and a controlled droplet application (CDA) sprayer for the control of the diamondback moth, Plutella xylostella L. (Lepidoptera : Plutellidae)

Shi-Jian, Guo, Geitz, Glenn, Franklin, Tom, Yin-Quan, Liu, Furlong, Michael J., Zalucki, Myron P. and Cooper, Larry (2004) A comparison of the performance and biological efficiency of new knapsack sprayers and a controlled droplet application (CDA) sprayer for the control of the diamondback moth, Plutella xylostella L. (Lepidoptera : Plutellidae). International Journal of Pest Management, 50 2: 121-127.


Author Shi-Jian, Guo
Geitz, Glenn
Franklin, Tom
Yin-Quan, Liu
Furlong, Michael J.
Zalucki, Myron P.
Cooper, Larry
Title A comparison of the performance and biological efficiency of new knapsack sprayers and a controlled droplet application (CDA) sprayer for the control of the diamondback moth, Plutella xylostella L. (Lepidoptera : Plutellidae)
Journal name International Journal of Pest Management   Check publisher's open access policy
ISSN 0967-0874
Publication date 2004
Sub-type Article (original research)
DOI 10.1080/09670870410001663714
Volume 50
Issue 2
Start page 121
End page 127
Total pages 7
Place of publication Abingdon
Publisher Taylor & Francis Ltd
Language eng
Subject 07 Agricultural and Veterinary Sciences
Abstract Field trials and laboratory bioassays were undertaken to compare the performance and efficacy (mortality of diamondback moth larvae) of insecticides applied to cabbages with three high volume hydraulic knapsack sprayers (NS-16, PB-20 and Selecta 12V) and a controlled droplet application (CDA) sprayer. In field experiments, the high volume knapsack sprayers (application rate 500-600 L ha(-1)) provided better spray coverage on the upper and lower surfaces of inner leaves, the upper surfaces of middle and outer leaves, and greater biological efficacy than the CDA sprayer (application rate 20similar to40 L ha(-1)). The PB-20 provided better spray coverage on the upper surface of middle leaves and both surfaces of outer leaves when compared with the Selecta 12V. However, its biological efficacy in the field was not significantly different from that of the other high volume sprayers. Increasing the application rate from 20 to 40 L ha(-1) for the CDA sprayer significantly increased droplet density but had no impact on test insect mortality. Laboratory evaluations of biological efficacy yielded higher estimates than field evaluations and there was no significant difference between the performance of the PB-20 and the CDA sprayer. Significant positive relationships were detected between insect mortality and droplet density deposited for both the PB-20 and the CDA sprayers.
Keyword Entomology
Knapsack Sprayer
High Volume
Very Low Volume
Cabbage
Plutella Xylostella
Insecticide Efficacy Assessment
Q-Index Code C1

 
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