Enumerative and Binomial Sampling Plans for Citrus Mealybug (Homoptera: Pseudococcidae) in Citrus Groves

2006 ◽  
Vol 99 (3) ◽  
pp. 993-1001 ◽  
Author(s):  
María Teresa Martínez-Ferrer ◽  
José Luís Ripollés ◽  
Ferran Garcia-Marí
Keyword(s):  
Sampling Plans ◽  
Citrus Mealybug ◽  
Binomial Sampling ◽  
Citrus Groves

Enumerative and Binomial Sampling Plans for Citrus Mealybug (Homoptera: Pseudococcidae) in Citrus Groves

2006 ◽  
Vol 99 (3) ◽  
pp. 993-1001 ◽  
Author(s):  
María Teresa Martínez-ferrer ◽  
José Luís Ripollés ◽  
Ferran Garcia-marí
Keyword(s):  
Sampling Plans ◽  
Citrus Mealybug ◽  
Binomial Sampling ◽  
Citrus Groves

Enumerative and Binomial Sampling Plans for Armored Scale (Homoptera: Diaspididae) on Kiwifruit Leaves

2000 ◽  
Vol 93 (6) ◽  
pp. 1752-1759 ◽  
Author(s):  
R. H. Blank ◽  
G. S. C. Gill ◽  
C. E. McKenna ◽  
P. S. Stevens
Keyword(s):  
Sampling Plans ◽  
Binomial Sampling ◽  
Armored Scale

Seasonal trends, sampling plans and parasitoid complex of the Chinese wax scale, Ceroplastes sinensis Del Guercio (Hemiptera: Coccidae), in Mediterranean citrus groves

2014 ◽  
Vol 105 (1) ◽  
pp. 70-81 ◽  
Author(s):  
M.T. Martínez-Ferrer ◽  
J.M. Campos-Rivela ◽  
M.J. Verdú
Keyword(s):  
Target Population ◽  
First Record ◽  
Abundant Species ◽  
Population Densities ◽  
Parasitoid Species ◽  
Egg Hatching ◽  
Sampling Plans ◽  
Seasonal Trends ◽  
Parasitoid Complex ◽  
Citrus Groves

AbstractSeasonal trends and the parasitoid complex of Chinese wax scale (Ceroplastes sinensis) was studied from July 2010 to February 2013. Six commercial citrus groves located in northeastern Spain were sampled fortnightly. Chinese wax scale completed a single annual generation. Egg oviposition started in May and continued until mid-July. Egg hatching began in mid-June, and in the first quarter of August, the maximum percentage of hatched eggs was reached. In the same groves, the parasitoid species of C. sinensis were determined together with their seasonal trends, relative abundance and occurrence on C. sinensis. Four hymenoptera were found parasitizing C. sinensis, mainly on third instars and females: Coccophagus ceroplastae (Aphelinidae), Metaphycus helvolus (Encyrtidae), Scutellista caerulea (Pteromalidae) and Aprostocetus ceroplastae (Eulophidae). The most abundant species was A. ceroplastae, corresponding to 54% of the parasitoids emerged. Coccophagus ceroplastae and M. helvolus represented 19%, whereas S. caerulea comprised 8% of the total. This study is the first published record of C. ceroplastae in Spain and the first record of M. helvolus on C. sinensis in Spain. Concerning the economical thresholds normally used, sampling plans developed for the management of C. sinensis in citrus groves should target population densities of around 12–20% of invaded twigs, equivalent to 0.2–0.5 females per twig. The sample size necessary to achieve the desired integrated pest management precision is 90–160 twigs per grove for the enumerative plan and about 160–245 twigs per grove for the binomial plan.

scholarly journals A Note on Simple Binomial Sampling Plans

1961 ◽  
Vol 32 (3) ◽  
pp. 906-908 ◽  
Author(s):  
B. Brainerd ◽  
T. V. Narayana
Keyword(s):  
Sampling Plans ◽  
Binomial Sampling

scholarly journals Sampling Mononychellus tanajoa (Acari: Tetranychidae) on cassava in Africa

1991 ◽  
Vol 81 (2) ◽  
pp. 201-208 ◽  
Author(s):  
J.S. Yaninek ◽  
J. Baumgaertner ◽  
A.P. Gutierrez
Keyword(s):  
Plant Distribution ◽  
Mononychellus Tanajoa ◽  
Dispersion Parameters ◽  
Plant Populations ◽  
Planting Dates ◽  
Sampling Plans ◽  
Binomial Sampling ◽  
Whole Plant ◽  
The Relationship ◽  
Taylor’S Dispersion

AbstractDensity-specific sampling plans were developed under African conditions for the exotic spider mite, Mononychellus tanajoa (Bondar), a serious pest of cassava, Manihot esculenta. The within-plant distribution of Mononychellus tanajoa was found to favour new foliage, regardless of time of planting or plant age. Consequently, the first developed leaf near the top of the foliage was selected as the sampling unit and related to whole plant populations of M. tanajoa. The relationship between the mite population's variance and mean as measured by Taylor's Power Law proved to be stable over a range of planting dates, seasons and locations. Two binomial sampling plans, one based on Taylor's dispersion parameters and another based on direct field observations, were developed and compared. Binomial sampling, appropriate only for densities below 30 mites per leaf, was replaced by an enumerative procedure based on a ‘quick count’ protocol at higher mite densities.

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