,Tydeus longisetosus El-Bagoury & Momen,

Tetranychus turkestani (Ugarov & Nikolskii)Zetzellia mali (Ewing)

*

Tydeus longisetosusTetranychus turkestani Zetzellia mali

T.

longisetosusT. turkestaniZ. mali

T. longisetosusT.

turkestani

Tetranychus turkestaniZetzellia maliTydeus longisetosus

Tetranychidae

*kamali_k@modares.ac.ir

h ttp:/ / jer.entomology.ir

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,Tydeus longisetosus ,Tetranychus turkestani

(Mo & Liu, 2006)

(Jamali, 2000)

Tetranychidae

Stigmaeidae

Zetzellia mali (Ewing)(Jamali et al., 2001)

Stigmaeidae

(Slone & Croft,

1998)Stigmaeid-Phytoseiid

(Clements & Harmsen, 1992) Z. mali

PhytoseiidaeStigmaeidae

(Slone & Croft, 2000)

(Radjabi, 2003)

(Sahragard & Heidari, 2001)

(Morisita, 1959)

(m))( 2s

bams 2(Taylor et al., 1998)

Southwood & Henderson, 2000

(Pedigo

& Buntin, 1994)

1- Hormolygosis

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(Heidari et al., 2006)

(Slone & Croft, 1998)

KochTetranychus urticae(So, 1991)

Z. mali(Jamali, 2000)

T. urticae

(Ahmadi et al., 2005)

Z. mali

(Jamali, 2000)

Tetranychus turkestani (Ugarove &

Nikolskii) El-Bagoury & Momen Tydeus longisetosusZetzellia mali

Z. maliT. longisetosusT. turkestani

t

1- Conservation 2-Augmentation

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,Tydeus longisetosus ,Tetranychus turkestani

(Relative Variance)RV

RV=(SE/m)×100

m

SE

RVRV

(Pedigo & Buntin, 1994)

2

md

stN

N

tt-student

s

d

m

b

a

(Taylor et al., 1998)

mbas logloglog 2

m

2s

b

ay

b

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bSE

bt

1

ttn-2tt

b=1

b>1b<1(Holt et al., 2002)

)1(

)1(

NN

xxnI ii

n

ixi

N

Z(Pedigo & Buntin, 1994)

I

2

1

2)

2(

)1(

nm

IZ

nmZ

(Morisita, 1959)

DI

(Morisita, 1959)

m

nsI D

)1(22

DI2s

m

)1(22 2Z 2

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,Tydeus longisetosus ,Tetranychus turkestani

(n-1)Z

I>1I<1

Greco et al., 1999

(k)

N

0N(Pedigo & Buntin, 1994)

)/1log(log0

kmkN

N

m

k

Z. mali

b>0b<0

RV

T. longisetosusT. turkestani

Z. mali

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turkestaniT.Z. maliT. longisetosus

Table 1 Mean population density of T. turkestani, T. longisetosus and Z. mali on two apple varieties in sampling dates

GoldenGolab

Z. mali T. longisetosus T. turkestani Z. mali T. longisetosus T. turkestani Sampling date

1.683.44 0.88 2.09 3.54 1.77 16 Jul

1.21 3.96 1.21 1.26 4.2 1.11 27 Jul

0.67 2.64 1.5 1.11 3.66 1.55 8 Aug

0.95 0.5 0.77 0.34 1.55 2.96 19 Aug0.2 4.26 0.97 0.61 3 0.05 30 Aug

0.24 5.34 0.79 0.92 8.23 0.11 10 Sep

0.829 3.35 1.22 1.057 4.02 1.26 Mean density

There were no significant differences between population densities of each species on two apple varieties

Z. mali

(Villanueva & Harmsen, 1998)

T. urticae(Ahmadi et al., 2005)

(Coll & Bottrell, 1995)

Tydeidae, TetranychidaeStigmaeidae

Z. mali

T. turkestaniZ. mali

T. longisetosus

Table 2- Estimated values of intercepts and slopes of different mite species by regression analysis of variances to means with Taylor's power law model on two apple varieties

PctttbSEbLog a Variety

T. turkestni

0 9.285 2.776 0.0042 1.39 0.417 Golab 0.085 1.40 2.776 0.887 2.25 0.45 Golden

Z. mali

0.004 -0.156 2.776 0.242 0.962 0.584 Golab 0.007 0.747 2.776 0.227 1.17 0.526 Golden

T. longisetosus

0 0.66 2.776 0.302 0.798 0.405 Golab 0.05 6.19 2.776 0.105 1.65 0.059 Golden

abbSEttt

cttPP-value

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,Tydeus longisetosus ,Tetranychus turkestani

b

T. turkestani

b

T. longisetosus

ZZ. mali

Z T. longisetosusT. turkestaniZ. mali

Table 3- Morisita's index and Z values for T. turkestani, T. longisetosus and Z. mali on two apple varieties

GoldenGolab

Z. maliT. longisetosusT. turkestani

Z. maliT. longisetosusT. turkestaniSampling date

3.397 1.60 2.380 2.401 1.16 2.226 16 Jul 14.243 7.38 4.296 9.721 1.93 7.215 Z4.042 1.59 1.946 6.589 1.34 2.968 27 Jul 13.824 8.84 4.3 29.155 6.06 9.07 Z 2.128 1.25 4.032 2.172 1.18 2.132 8 Aug 2.865 2.51 17.026 0.143 2.5 6.474 Z10.95 0.4 2.126 2.409 2.46 5.661 19 Aug 13.06 -0.995 12.72 -0.995 8.63 11.94 Z

9.714 1.43 4.829 1.963 1.62 30 Aug

1.152 0.106 15.32 1.862 5.9 Z

8.285 1.3 2.063 1.543 1.12 10 Sep

6.694 7.26 3.211 0.209 0.049 Z

Z

Z

So (1991)T. urticae

T. urticae

(Ahmadi et al., 2005)

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ZT. longisetosusT. turkestaniZ. mali

Table 4- Calculated DI and Z values for T. turkestani, T. longisetosus and Z. mali on two apple varieties

GoldenGolabSpecies

Z DIZ DI14.86 544.62 13.2 473.78 T. longisetosus18.31 664.25 9.77 697.8 Z. mali 16.58 602.70 18.27 642.66 T. turkestani

(Sahragard & Heidari, 2001)

Z. mali

(k)T. longisetosusT. turkestaniZ. mali

Table 5 Calculated k (coefficient of aggregation) values for T. turkestani, T. longisetosus and Z. mali on two apple varieties

GoldenGolab

Z. mali T. longisetosus T. turkestani

Z. maliT. longisetosusT. turkestaniSampling date

0.297 1.63 0.256 0.372 0.5 0.897 16 Jul 0.173 1.82 0.553 0.167 1.91 0.341 27 Jul 0.276 1.34 0.289 0.387 1.71 0.676 8 Aug 0.196 0.55 -0.3 1.23 0.48 0.528 19 Aug 1.103 1.67 0.152 0.217 0.5 0.993 30 Aug 1.075 1.17 0.297 0.328 0.5 1.028 10 Sep

t

T. turkestani

T.

longisetosus Z. mali Slone & Croft (2000)

Z. mali

(Z. mali & T. turkestani, Z. mali & T.

longisetosus)(b=0)

Clements & Harmsen (1992)

StigmaeidaePhytoseiidae

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References

Ahmadi, M., Fathipour, Y. and Kamali, K. 2005. Population density and spatial distribution pattern of Tetranychus urticae (Acari., Tetranychidae) on different bean varieties in Tehran region. Iranian Journal of Agricultural Sciences, 36(5): 1087-1092. [In Persian with English summery]

Clements, D. R. and Harmsen, R. 1992. Stigmaeid-phytoseiid interactions and impact of natural enemy complex on plant-inhabiting mites. Experimental and Applied Acarology, 14: 327-341.

Coll, M. and Bottrell, D. G. 1995. Predator-prey associations in mono and dicultures: effect of maize and bean vegetation. Agriculture, Ecosystems and Environment, 54: 115-125.

Duso, C., Pozebon, A., Cappuzzo, C., Malagnini, V., Otto, S. and Borgo, M. 2004. Grape downey mildew spread and mite seasonal abundance in vineyards: effect on Tydeus caudatus and its predators. Bio-logical Control, 32: 143-154.

Greco, N. M., Liljesthrom, G. G. and Sanchez, N. E. 1999. Spatial distribution and coincidence of Neoseiulus californicus and Tetranychus urticae (Acari., Phytoseiidae, Tetranychidae) on strawberry. Experimental and Applied Acarology, 23: 567-580.

Heidari, S., Fathipour, Y. and Sadeghi, S. E. 2006. The effect of popular stand density on the spatial dis-tribution pattern of pests and their natural enemies in Karaj. Journal of Entomological Society of Iran, 26(1): 13-31. [In Persian with English summery]

Holt, A. R., Gaston, K. J. and Fangliang, H. 2002. Occupancy-abundance relationships and spatial distri-bution: A review. Basic and Applied Ecology, 3: 1-13.

Jamali, M. A. 2000. Biology and population dynamics of Zetzellia mali (Acari., Stigmaeidae) in apple or-chards of Karaj-Iran. An M. Sc. Thesis submitted to Tarbiat Modares University, 86 pp. [In Persian with English summary]

Jamali, M. A., Kamali, K., Saboori, A., and Nowzari, J. 2001. Biology of Zetzellia mali (Ewing) (Acari., Stigmaeidae) in Karaj, Iran. Systematic and Applied Acarology, 5: 55 60.

Mo, T. L. and Liu, T. X. 2006. Biology, life table and predation of Feltiella acarisuga (Dip., Cecidomyii-dae) feeding on Tetranychus cinnabarinus eggs (Acari., Tetranychidae). Biological Control, 39: 418-426.

Morisita, M. 1959. Measuring of the dispersion of individuals and analysis of the dispersal patterns. Mem-oirs of the Faculty of Science, Kyushu University, Series E, 2: 215-235.

Pedigo, L. P. and Buntin, G. D. 1994. Handbook of Sampling Methods for Arthropods in Agriculture. CRC Press, Florida, 714 pp.

Radjabi, Gh. 2003. Insect Ecology Applied and Considering the Conditions of Iran. Agricultural Research and Education Organization Publishing, 622 pp. [In Persian]

Sahragard, A. and Heidari, R. 2001. Biology and spatial distribution of rose sawfly (Hym., Argidae) in Guilan. Journal of Entomological Society of Iran, 21(2): 25-37. [In Persian with English summary]

Slone, D. H. and Croft, B. A. 1998. Detecting differences in arthropod aggregation by comparing the pro-portion of occupied sample units. Journal of Entomologia Experimentalis et Applicata, 87: 59-66.

Slone, D. H. and Croft, B. A. 2000. Changes in intraspecific aggregation and the coexistence of predaceous apple mites. Oikos, 91(1): 153-161.

So, P. M. 1991. Distribution patterns and sampling plans for Tetranychus urticae Koch (Acari: Tetranychi-dae) on roses. Researches on Population Ecology, 33(2): 229-243.

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Southwood, T. R. E. and Henderson, P. A. 2000. Ecological methods. 3rd ed. Blackwell Sciences, Oxford,

524 pp. Taylor, R. A. J., Lindquest, R. K. and Shipp, J. L. 1998. Variation and consistency in spatial distribution

as measured by Taylor s Power Law. Environmental Entomology, 27: 191-201. Villanueva, R. T. and Harmsen, L. 1998. Studies on the role of stigmaeid predator Zetzellia mali in the

acarine system of apple foliage. Proceeding of the Entomological Society of Ontario, 129: 149-155.

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Comparison of population density and spatial distribution of Tydeus longisetosus El-Bagoury & Momen, Tetranychus turkestani (Ugarov & Nikolskii) and their predator

Zetzellia mali (Ewing) on two apple varieties in Maragheh region

S. Khodayari1*, K. Kamali1, Y. Fathipour1

1- Entomology Department, Agricultural Faculty,Tarbait Modarres University, Tehran, Iran

Abstract

Population density of Tydeus longisetosus El-Bagoury & Momen, Tetranychus turkestani (Ugarov & Nikolskii) and their predator Zetzellia mali (Ewing) on two varieties of apple (Golden delicious and Golab) was studied in Maragheh (Northwestern of Iran) during summer of 2006. The result showed that the mean density of T. longisetosus and T. turkestani on Golden delicious and Golab varieties were 3.35±0.67, 4.02±0.91 and 1.022±0.12, 1.26±0.45 per leaf, respectively. The mean density of Z. mali were 0.829±0.23 and 1.057±0.25 per leaf on Golden delicious and Golab varieties, respectively. Comparison of mean densities on two varieties was done by t-test and showed no significant differences between mean densities on two varieties. Spatial distribution of two species was determined by Taylor's power law, Morisita's coefficient and index of dispersion. Taylor's power law showed that spatial distribution of T. longisetosus on Golden delicious and Go-lab varieties was aggregated and random, respectively. T. turkestani was distributed in aggregated pattern on Golab variety and there was no significant relationship between its parameters on Golden delicious, in this way Z. mali was distributed randomly on two varieties too. Aggregated spatial distribution of all species was determined by Morisita's coefficient and index of dispersion on two varieties in most cases. Linear regression between mean density of phytophagous and pre-daceous mites showed that the predator acts as density independent. Apple varieties have no effect on population density of studied mites but make an effect on spatial distribution of them to some extents.

Key words: Population density, Spatial distribution, Tetranychus turkestani, Zetzellia mali, Tydeus longise-tosus, Maragheh

* Corresponding Author, E-mail: kamali_k@modares.ac.ir Received: 22 Jul 2009 Accepted: 11 Nov 2009

Islamic Azad University, Arak Branch ISSN 2008-4668

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Journal of Entomological Research

Volume 1 , Issue 3 , pages: 197-208

208

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