Binomial sampling of <i>Paraleyrodes</i> Quaintance pos. <i>bondari</i> (Hemiptera: Aleyrodidae) in <i>Persea americana</i> Mill.
Fresno (Tolima), in Colombia, is a notable avocado producer, with 36% of the national production. In this paper, two sampling methods are presented to assess natural populations of Paraleyrodes Quaintance pos. bondari attacking avocado trees of Hass and Lorena cultivars under field conditions. The p...
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| Format: | Article |
| Language: | English |
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Centro Editorial of Facultad de Ciencias Agrarias, Universidad Nacional de Colombia
2016-05-01
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| Series: | Agronomía Colombiana |
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| Online Access: | https://revistas.unal.edu.co/index.php/agrocol/article/view/54084 |
| _version_ | 1818290636430770176 |
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| author | Luis Sigifredo Caicedo R. Edgar Herney Varón D. Helena Luisa Brochero |
| author_facet | Luis Sigifredo Caicedo R. Edgar Herney Varón D. Helena Luisa Brochero |
| author_sort | Luis Sigifredo Caicedo R. |
| collection | DOAJ |
| description | Fresno (Tolima), in Colombia, is a notable avocado producer, with 36% of the national production. In this paper, two sampling methods are presented to assess natural populations of Paraleyrodes Quaintance pos. bondari attacking avocado trees of Hass and Lorena cultivars under field conditions. The presence/absence of whitefly nymph colonies on 30 leaves located at the high, medium and low strata per host plant from both cultivars was evaluated. Visual estimations were performed to count the number of whitefly nymphs on 1.25 cm2 of five leaves/bud in low and medium strata per tree to evaluate the spatial distribution of whitefly population in accordance to Poisson distribution, Negative Binomial distribution and b parameter of Law of Taylor. Significant differences in percentages of infestation (P≤0.03) from leaves that belonged to the low avocado tree strata were found between the Lorena (31.88±1.2%) and Hass (15.64±1.8%) cultivars. Natural populations of P. pos. bondari were located on the abaxial leaf side, showing an aggregate distribution in avocado tree from orchards located at different altitudes. Our findings recommend entomological surveillance for Paraleyrodes sp. pos. bondari in Fresno (Tolima), sampling four branches from the medium and low avocado tree strata through inspection of five buds/branches/tree throughout each branch with the presence/absence method to count whitefly nymph colonies on the abaxial side of pre-basal leaves. In total, the sampling involved five leaves/branch (20 leaves/strata or 40 leaves/tree) on 13 avocado trees per hectare. |
| first_indexed | 2024-12-13T02:31:19Z |
| format | Article |
| id | doaj.art-7196a00ac5c04ea2be147d8bb5aa3e05 |
| institution | Directory Open Access Journal |
| issn | 0120-9965 2357-3732 |
| language | English |
| last_indexed | 2024-12-13T02:31:19Z |
| publishDate | 2016-05-01 |
| publisher | Centro Editorial of Facultad de Ciencias Agrarias, Universidad Nacional de Colombia |
| record_format | Article |
| series | Agronomía Colombiana |
| spelling | doaj.art-7196a00ac5c04ea2be147d8bb5aa3e052022-12-22T00:02:29ZengCentro Editorial of Facultad de Ciencias Agrarias, Universidad Nacional de ColombiaAgronomía Colombiana0120-99652357-37322016-05-0134220921610.15446/agron.colomb.v34n2.5408443185Binomial sampling of <i>Paraleyrodes</i> Quaintance pos. <i>bondari</i> (Hemiptera: Aleyrodidae) in <i>Persea americana</i> Mill.Luis Sigifredo Caicedo R.0Edgar Herney Varón D.1Helena Luisa Brochero2Department of Agronomy, Faculty of Agricultural Sciences, Universidad Nacional de Colombia. BogotaNataima Research Center, Corporacion Colombiana de Investigacion Agropecuaria (Corpoica). EspinalDepartment of Agronomy, Faculty of Agricultural Sciences, Universidad Nacional de Colombia. BogotaFresno (Tolima), in Colombia, is a notable avocado producer, with 36% of the national production. In this paper, two sampling methods are presented to assess natural populations of Paraleyrodes Quaintance pos. bondari attacking avocado trees of Hass and Lorena cultivars under field conditions. The presence/absence of whitefly nymph colonies on 30 leaves located at the high, medium and low strata per host plant from both cultivars was evaluated. Visual estimations were performed to count the number of whitefly nymphs on 1.25 cm2 of five leaves/bud in low and medium strata per tree to evaluate the spatial distribution of whitefly population in accordance to Poisson distribution, Negative Binomial distribution and b parameter of Law of Taylor. Significant differences in percentages of infestation (P≤0.03) from leaves that belonged to the low avocado tree strata were found between the Lorena (31.88±1.2%) and Hass (15.64±1.8%) cultivars. Natural populations of P. pos. bondari were located on the abaxial leaf side, showing an aggregate distribution in avocado tree from orchards located at different altitudes. Our findings recommend entomological surveillance for Paraleyrodes sp. pos. bondari in Fresno (Tolima), sampling four branches from the medium and low avocado tree strata through inspection of five buds/branches/tree throughout each branch with the presence/absence method to count whitefly nymph colonies on the abaxial side of pre-basal leaves. In total, the sampling involved five leaves/branch (20 leaves/strata or 40 leaves/tree) on 13 avocado trees per hectare.https://revistas.unal.edu.co/index.php/agrocol/article/view/54084whiteflypest samplingHass cultivarLorena cultivaravocado. |
| spellingShingle | Luis Sigifredo Caicedo R. Edgar Herney Varón D. Helena Luisa Brochero Binomial sampling of <i>Paraleyrodes</i> Quaintance pos. <i>bondari</i> (Hemiptera: Aleyrodidae) in <i>Persea americana</i> Mill. Agronomía Colombiana whitefly pest sampling Hass cultivar Lorena cultivar avocado. |
| title | Binomial sampling of <i>Paraleyrodes</i> Quaintance pos. <i>bondari</i> (Hemiptera: Aleyrodidae) in <i>Persea americana</i> Mill. |
| title_full | Binomial sampling of <i>Paraleyrodes</i> Quaintance pos. <i>bondari</i> (Hemiptera: Aleyrodidae) in <i>Persea americana</i> Mill. |
| title_fullStr | Binomial sampling of <i>Paraleyrodes</i> Quaintance pos. <i>bondari</i> (Hemiptera: Aleyrodidae) in <i>Persea americana</i> Mill. |
| title_full_unstemmed | Binomial sampling of <i>Paraleyrodes</i> Quaintance pos. <i>bondari</i> (Hemiptera: Aleyrodidae) in <i>Persea americana</i> Mill. |
| title_short | Binomial sampling of <i>Paraleyrodes</i> Quaintance pos. <i>bondari</i> (Hemiptera: Aleyrodidae) in <i>Persea americana</i> Mill. |
| title_sort | binomial sampling of i paraleyrodes i quaintance pos i bondari i hemiptera aleyrodidae in i persea americana i mill |
| topic | whitefly pest sampling Hass cultivar Lorena cultivar avocado. |
| url | https://revistas.unal.edu.co/index.php/agrocol/article/view/54084 |
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