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Paper Information

Journal:   PLANT PEST RESEARCH   2012 , Volume 2 , Number 1; Page(s) 21 To 28.
 
Paper: 

SPATIAL DISTRIBUTION OF THIACIDAS POSTICA WALKER (LEPIDOPTERA: NOCTUIDAE) LARVAE ON ZIZIPHUS SPINA-CHRISTI IN BUSHEHR REGION

 
 
Author(s):  FARRAR N.*, HAGHANI M.
 
* RESEARCH CENTER AGRICULTURAL AND NATURAL RESOURCES, BUSHEHR, IRAN
 
Abstract: 

The spatial distribution pattern of pests can be useful in planning and performing the integrated pest management. The Konar moth, Thiacidas postica Walker (Lepidoptera: Noctuidae), is a defoliator of Konar (Ziziphus spina-christi), in south of Iran especially Bushehr, Hormozgan and Khuzestan provinces. The Larva is defoliator of Ziziphus spp. Extension of Konar cultivation in south of Iran as an economic orchards caused complete studies on some important pests. The spatial distribution of T.
posticafifth instar larvae was studied in field conditions on the Ziziphus spp. during 2006-2008. A 50 cm of branches of each Konar tree was selected as sampling units. With a primary sampling sample size was determined as 40. In this research, the spatial distribution pattern of fifth instar larvae of T.
posticausing regression models (Taylor’s power law and Iwao’s patchiness regression) was determined. Population density of T. postica and its parasitoid, Pales murina Mes. (Diptera: Tachinidae), was studied by Regression and Linear equation. The results showed that Taylor’s power law (R2=0.98) and Iwao’s patchiness regression, (R2=0.86), that the Konar moth larval population was aggregated on the host plant branches. As the slop of regression was significantly greater than 1, and it implies that large samples are required to obtain density estimates at an acceptable level of precision.
The relationship between eating and behaviors of different larval instars fitted both Taylor’s power law and Iwao’s patchiness regression model. The slop of regression, b, was 1.99 and 3.45 for Taylor’s power law and Iwao’s patchiness regression, respectively. Then spatial distribution of fifth larval instars of T. postica on Z. spina-christi was estimated aggregated (clumped). Regression and Linear equation between mean of 5th instar larva density of T. postica and percentage of parasitism of P.
murinaalso showed that parasitoid acts as a density dependent factor.

 
Keyword(s): THIACIDAS POSTICA, ZIZIPHUS SPINA-CHRISTI, SPATIAL DISTRIBUTION, TAYLOR’S POWER LAW, IWAO’S PATCHINESS REGRESSION, PALES MURINA, TACHINIDAE
 
 
References: 
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Citations: 
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+ Click to Cite.
APA: Copy

FARRAR, N., & HAGHANI, M. (2012). SPATIAL DISTRIBUTION OF THIACIDAS POSTICA WALKER (LEPIDOPTERA: NOCTUIDAE) LARVAE ON ZIZIPHUS SPINA-CHRISTI IN BUSHEHR REGION. PLANT PEST RESEARCH, 2(1), 21-28. https://www.sid.ir/en/journal/ViewPaper.aspx?id=307276



Vancouver: Copy

FARRAR N., HAGHANI M.. SPATIAL DISTRIBUTION OF THIACIDAS POSTICA WALKER (LEPIDOPTERA: NOCTUIDAE) LARVAE ON ZIZIPHUS SPINA-CHRISTI IN BUSHEHR REGION. PLANT PEST RESEARCH. 2012 [cited 2021October22];2(1):21-28. Available from: https://www.sid.ir/en/journal/ViewPaper.aspx?id=307276



IEEE: Copy

FARRAR, N., HAGHANI, M., 2012. SPATIAL DISTRIBUTION OF THIACIDAS POSTICA WALKER (LEPIDOPTERA: NOCTUIDAE) LARVAE ON ZIZIPHUS SPINA-CHRISTI IN BUSHEHR REGION. PLANT PEST RESEARCH, [online] 2(1), pp.21-28. Available: https://www.sid.ir/en/journal/ViewPaper.aspx?id=307276.



 
 
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