Sampling for Asian citrus psyllid (ACP) in Florida

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Material Information

Title:
Sampling for Asian citrus psyllid (ACP) in Florida
Physical Description:
Fact sheet
Creator:
Arevalo, H.A.
Publisher:
University of Florida Cooperative Extension Service, Institute of Food and Agriculture Sciences, EDIS
Place of Publication:
Gainesville, Fla.
Publication Date:

Notes

Acquisition:
Collected for University of Florida's Institutional Repository by the UFIR Self-Submittal tool. Submitted by Melanie Mercer.
Publication Status:
Published
General Note:
"Original publication date September 2010."
General Note:
"ENY-857"

Record Information

Source Institution:
University of Florida Institutional Repository
Holding Location:
University of Florida
Rights Management:
All rights reserved by the submitter.
System ID:
IR00003833:00001


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ENY-857 Sampling for Asian citrus psyllid (ACP) in Florida citrus groves1 H. A. Arevalo, J. A. Qureshi and P. A. Stansly2 The use of trade names in this publication is solely for the purpose of providing specific information. UF/IFAS does not guarantee or warranty the products named, and references to them in this publication does not signify our approval to the exclusion of other products of suitable composition. The Institute of Food and Agricultural Sciences (IFAS) is an Equal Opportunity Institution authorized to provide research, educational information and other services only to individuals and institutions that function with non-discrimination with respect to race, creed, color, religion, age, disability, sex, sexual orientation, marital status, national origin, political opinions or affiliations. U.S. Department of Agriculture, Cooperative Extension Service, University of Florida, IFAS, Florida A. & M. University Cooperative Extension Program, and Boards of County Commissioners Cooperating. Millie Ferrer-Chancy, Interim Dean Diaphorina citr Candidatus

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Sampling for Asian citrus psyllid (ACP) in Florida citrus groves 2 Stem-tap sampling Figure 1. Instructions for conducting a stem-tap sample to monitor Asian citrus psyllid, other foliar pests and some natural enemies such as ladybeetles or spiders. Sweep-net sampling

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Sampling for Asian citrus psyllid (ACP) in Florida citrus groves 3 Figure 2. Stem-tap technique (left). Close up of psyllid adults on a laminated sheet or clipboard (right). Figure 3. Use of a sweep net describing the figure 8 inside the canopy (left). Inside view of the net after the sample showing debris and ants (right). Sticky traps Figure 4. Deployment (left) and close-up (right) of yellow sticky traps used in citrus to monitor adult ACP populations. A psyllid captured in the trap can be seen inside the red circle. Flush observation Aphis spiraecola

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Sampling for Asian citrus psyllid (ACP) in Florida citrus groves 4 Figure 5. Damage by two sucking pests in young citrus shoots. Note the curling produced by aphid feeding (left) in contrast to twisting and deformation caused by ACP (right). Routine monitoring protocol References cited Diaphorina citri Diaphorina citri D. citri

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Sampling for Asian citrus psyllid (ACP) in Florida citrus groves 5 Diaphorina citri Diaphorina citr Tamarixia radiata Diaphorina citri Trioza erytreae

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Sampling for Asian citrus psyllid (ACP) in Florida citrus groves 6 Table 1. Relationship between hypothetic threshold and number of tap samples needed to obtain 75% precision (100 standard error / mean) necessary to make informed decisions under commercial conditions according to Southwood & Henderson (2000). This data was calculated based on an average standard deviation () = 0.39 observed from data collected over two years in several commercial and research citrus blocks. Threshold (ACP adults per 100 taps) 10 15 20 25 30 40 50 Number of tap samples needed 243 108 61 39 27 15 10 Table 2. Cost of sampling and spraying a 50-acre block of citrus for ACP control in 2010 in southwest Florida. Costs are based on $10 per hour salary for a scout and a $10/day depreciation cost for an ATV (HAA and PAS unpublished data). 50 ac. block Stem-Tap Sample Sweep Net Sticky Traps Insecticide application @ $24.95/ac 2 Cost (materials and labor) 1 $ 7.40 $ 7.40 $ 203.60 $1,247.50 Vehicle fuel and amortization $10 $ 10 $ 10 Total cost / block $ 17.40 $ 17.40 $ 213.60 $1,247.50 Risks Population may be too low to detect Spread canker Knock down fruit Difficult to record Delayed results Time consuming Expensive Might be a waste of resources if ACP is low 1 Labor cost based on 1/2 hour of work @ $15.80 per hour. For sticky traps, the value of the traps ($100) is also added. 2 Assuming an aerial low volume fixed wing @ 5 GPA. For this example, we used Danitol at $19.45/acre

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Datasheet to monitor citrus pests and beneficial insects, with an emphasis on Asian citrus psyllid (ACP) Entomology Group. University of Florida Southwest Florida Research an d Education Center [ http://swfrec.ifas.ufl.edu/entlab/ ]