Spatio-Temporal Distribution and Fixed-Precision Sampling Plan of <i>Scirtothrips dorsalis</i> (Thysanoptera: Thripidae) in Florida Blueberry
<i>Scirtothrips dorsalis</i> Hood is an invasive and foliar pest of Florida blueberry that reduces plant growth by feeding on new leaf growth. A sampling plan is needed to make informed control decisions for <i>S. dorsalis</i> in blueberry. Fourteen blueberry fields in centra...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-03-01
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| Series: | Insects |
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| Online Access: | https://www.mdpi.com/2075-4450/12/3/256 |
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| author | Babu R. Panthi Justin M. Renkema Sriyanka Lahiri Oscar E. Liburd |
| author_facet | Babu R. Panthi Justin M. Renkema Sriyanka Lahiri Oscar E. Liburd |
| author_sort | Babu R. Panthi |
| collection | DOAJ |
| description | <i>Scirtothrips dorsalis</i> Hood is an invasive and foliar pest of Florida blueberry that reduces plant growth by feeding on new leaf growth. A sampling plan is needed to make informed control decisions for <i>S. dorsalis</i> in blueberry. Fourteen blueberry fields in central Florida were surveyed in 2017 and 2018 after summer pruning to determine the spatial and temporal distribution of <i>S. dorsalis</i> and to develop a fixed-precision sampling plan. A sampling unit of ten blueberry shoots (with four to five leaves each) was collected from one blueberry bush at each point along a 40 × 40 m grid. Field counts of <i>S. dorsalis</i> varied largely ranging from zero to 1122 adults and larvae per sampling unit. <i>Scirtothrips dorsalis</i> had aggregated distribution that was consistent within fields and temporally stable between summers, according to Taylor’s power law (TPL) (aggregation parameter, <i>b</i> = 1.57), probability distributions (56 out of 70 sampling occasions fit the negative binomial distribution), Lloyd’s index (<i>b</i> > 1 in 94% occasions), and Spatial Analysis by Distance IndicEs (31% had significant clusters). The newly developed fixed-precision sampling plan required 167, 42, seven, or three sampling units to estimate a nominal mean density of 20 <i>S. dorsalis</i> per sampling unit with a precision of 5%, 10%, 25%, or 40%, respectively. New knowledge on <i>S. dorsalis</i> distribution will aid in evaluating the timing and effectiveness of control measures. |
| first_indexed | 2024-03-10T13:08:14Z |
| format | Article |
| id | doaj.art-ee69761b857348e682bb4d8aa82bbe71 |
| institution | Directory Open Access Journal |
| issn | 2075-4450 |
| language | English |
| last_indexed | 2024-03-10T13:08:14Z |
| publishDate | 2021-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Insects |
| spelling | doaj.art-ee69761b857348e682bb4d8aa82bbe712023-11-21T10:57:48ZengMDPI AGInsects2075-44502021-03-0112325610.3390/insects12030256Spatio-Temporal Distribution and Fixed-Precision Sampling Plan of <i>Scirtothrips dorsalis</i> (Thysanoptera: Thripidae) in Florida BlueberryBabu R. Panthi0Justin M. Renkema1Sriyanka Lahiri2Oscar E. Liburd3Gulf Coast Research and Education Center, University of Florida, Wimauma, FL 33598, USAGulf Coast Research and Education Center, University of Florida, Wimauma, FL 33598, USAGulf Coast Research and Education Center, University of Florida, Wimauma, FL 33598, USADepartment of Entomology and Nematology, University of Florida, Gainesville, FL 32611, USA<i>Scirtothrips dorsalis</i> Hood is an invasive and foliar pest of Florida blueberry that reduces plant growth by feeding on new leaf growth. A sampling plan is needed to make informed control decisions for <i>S. dorsalis</i> in blueberry. Fourteen blueberry fields in central Florida were surveyed in 2017 and 2018 after summer pruning to determine the spatial and temporal distribution of <i>S. dorsalis</i> and to develop a fixed-precision sampling plan. A sampling unit of ten blueberry shoots (with four to five leaves each) was collected from one blueberry bush at each point along a 40 × 40 m grid. Field counts of <i>S. dorsalis</i> varied largely ranging from zero to 1122 adults and larvae per sampling unit. <i>Scirtothrips dorsalis</i> had aggregated distribution that was consistent within fields and temporally stable between summers, according to Taylor’s power law (TPL) (aggregation parameter, <i>b</i> = 1.57), probability distributions (56 out of 70 sampling occasions fit the negative binomial distribution), Lloyd’s index (<i>b</i> > 1 in 94% occasions), and Spatial Analysis by Distance IndicEs (31% had significant clusters). The newly developed fixed-precision sampling plan required 167, 42, seven, or three sampling units to estimate a nominal mean density of 20 <i>S. dorsalis</i> per sampling unit with a precision of 5%, 10%, 25%, or 40%, respectively. New knowledge on <i>S. dorsalis</i> distribution will aid in evaluating the timing and effectiveness of control measures.https://www.mdpi.com/2075-4450/12/3/256chilli thripsinvasive pestspatial analysisaggregation indicesmonitoring |
| spellingShingle | Babu R. Panthi Justin M. Renkema Sriyanka Lahiri Oscar E. Liburd Spatio-Temporal Distribution and Fixed-Precision Sampling Plan of <i>Scirtothrips dorsalis</i> (Thysanoptera: Thripidae) in Florida Blueberry Insects chilli thrips invasive pest spatial analysis aggregation indices monitoring |
| title | Spatio-Temporal Distribution and Fixed-Precision Sampling Plan of <i>Scirtothrips dorsalis</i> (Thysanoptera: Thripidae) in Florida Blueberry |
| title_full | Spatio-Temporal Distribution and Fixed-Precision Sampling Plan of <i>Scirtothrips dorsalis</i> (Thysanoptera: Thripidae) in Florida Blueberry |
| title_fullStr | Spatio-Temporal Distribution and Fixed-Precision Sampling Plan of <i>Scirtothrips dorsalis</i> (Thysanoptera: Thripidae) in Florida Blueberry |
| title_full_unstemmed | Spatio-Temporal Distribution and Fixed-Precision Sampling Plan of <i>Scirtothrips dorsalis</i> (Thysanoptera: Thripidae) in Florida Blueberry |
| title_short | Spatio-Temporal Distribution and Fixed-Precision Sampling Plan of <i>Scirtothrips dorsalis</i> (Thysanoptera: Thripidae) in Florida Blueberry |
| title_sort | spatio temporal distribution and fixed precision sampling plan of i scirtothrips dorsalis i thysanoptera thripidae in florida blueberry |
| topic | chilli thrips invasive pest spatial analysis aggregation indices monitoring |
| url | https://www.mdpi.com/2075-4450/12/3/256 |
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