Accession Number : ADA549753


Title :   Evaluation of Low-volume Sprayers Used in Asian Citrus Psyllid Control Applications


Descriptive Note : Journal article


Corporate Author : AGRICULTURAL RESEARCH SERVICE COLLEGE STATION TX


Personal Author(s) : Hoffmann, Clint ; Fritz, Brad ; Martin, Dan ; Atwood, Ryan ; Hurner, Tim ; Ledebuhr, Mark ; Tandy, Matt ; Jackson, John L ; Wisler, Gail


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a549753.pdf


Report Date : Jun 2010


Pagination or Media Count : 8


Abstract : The asian citrus psyllid [Diaphorina citri (Sternorrhyncha: Psyllidae)] is a detrimental pest to citrus (Citrus spp.) crops when it serves as a vector of the pathogen that causes greening (huanglongbing). Transmission of this disease causes mottling, chlorosis, dieback, and reductions in fruit size and quality. Citrus producers have found that many pesticides, when applied properly, are very effective at suppressing or eliminating asian citrus psyllids in groves. Due to the threat of greening, several pesticides have been granted Special Local Needs registration for use in the state of Florida if the product is sprayed with a volume median diameter of 90 mm or greater. A number of studies involving numerous citrus sprayers and a.i. were conducted to determine the droplet sizes generated by different sprayers operating under user-established settings and the adjustments required to those settings for the sprayers to meet the 90-mm requirement. In the sprayer tests, it was found that reductions in engine speed or increases in flow rate were required to increase droplet sizes to meet the product label-required droplet size. As the equipment tested here represent the most typical application equipment used in Florida for asian citrus psyllid control, these results will provide applicators, growers, and extension agents with general guidelines to ensure that spray systems are operated in a manner that complies with label restrictions.


Descriptors :   *PESTICIDES , *SPRAYERS , CITRUS FRUIT , DROPS , FARM CROPS , INSECT CONTROL , PARTICLE SIZE , REPRINTS


Subject Categories : Agronomy, Horticulture and Aquiculture
      Machinery and Tools


Distribution Statement : APPROVED FOR PUBLIC RELEASE