Density dependent population growth of the two-spotted spider mite, Tetranychus urticae
, on the host plant Leonurus cardiaca

The two-spotted spider mite (Tetranychus urticae Koch.) has a worldwide distribution and is one of the most harmful agricultural pests for a variety of plant species. To reveal a visible light wavelength that reduces the population growth rate (as rm, unit: d–1) of the mite, we investigated the rm under wavelength peaks of 468, 515, and 658 nm with half bandwidths of 23, 44, and 22 nm using blue, green, and red light-emitting diodes, respectively. In all treatments, light intensity was set at 2.3 W·m–2 with a light period of 16 h·d–1, and air temperature was set at 25 °C. The survival percentage (lx) and the number of eggs deposited per female (mx) on each age (x, unit: d) were determined to calculate the rm by the following equation: ∑exp(–rm · x)· lx /100 · mx = 1. The rm and the total mx decreased with increasing wavelength. This result shows that the population growth rate can be reduced under red light (658 nm).

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Population growth parameters of the two-spotted spider mite, Tetranychus urticae, on three peach varieties, in Iran

Acarologia ◽

10.1051/acarologia/20112029 ◽

2011 ◽

Vol 51 (4) ◽

pp. 473-480 ◽

Cited By ~ 10

Author(s):

E. Riahi ◽

A. Nemati ◽

P. Shishehbor ◽

Z. Saeidi

Keyword(s):

Population Growth ◽

Tetranychus Urticae ◽

Spider Mite ◽

Growth Parameters ◽

Two Spotted Spider Mite ◽

Population Growth Parameters

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Tomato Carrying MI-1.2 Gene as a Host-Plant to the Two-Spotted Spider Mite (Tetranychus urticae Koch): Results of Laboratory Evaluation

Vegetable Crops Research Bulletin ◽

10.2478/v10032-010-0002-2 ◽

2010 ◽

Vol 72 (1) ◽

pp. 15-24 ◽

Cited By ~ 2

Author(s):

Monika Godzina ◽

Małgorzata Kiełkiewicz ◽

Katarzyna Szymczykiewicz

Keyword(s):

Host Plant ◽

Tetranychus Urticae ◽

Spider Mite ◽

Reproductive Potential ◽

Laboratory Evaluation ◽

Population Parameters ◽

Tomato Plants ◽

Two Spotted Spider Mite ◽

Short Time ◽

Tetranychus Urticae Koch

Tomato CarryingMI-1.2Gene as a Host-Plant to the Two-Spotted Spider Mite (Tetranychus urticaeKoch): Results of Laboratory EvaluationMi-1.2gene contributes to the resistance of tomato plants against some species of herbivores (i.e. nematodes, aphids) that are sap-feeders. In this study, two genotypes of tomato (Solanum lycopersicumL. syn.Lycopersicon esculentumMill.) plants with dominant (Motelle cv) and recessive (Moneymaker cv)Mi-1.2alleles were evaluated as a host-plant to the two-spotted spider mite (Tetranychus urticaeKoch, Acari: Tetranychidae). Plants were grown under glasshouse conditions. The effect of tomato genotypes onT. urticaebionomy was estimated on cut leaflets in controlled photoperiod, temperature and humidity (L/D=16/8 h; D/N temp.=23/20°C; RH=70%). Results of laboratory evaluation showed that both the bionomy and population parameters ofT. urticaereached a very similar or even higher value on plants with dominantMi-1.2allele than on plants with recessive one. A relatively high value ofT. urticaeparameters on plants resistant to root knot nematodes indicates that the mite has potential to develop rapidly. This allows the mite population to reach the density causing marked damage to plant in a short time. It is concluded that the presence ofMi-1.2gene product in tomato plants does not significantly affect the reproductive potential ofT. urticae.Therefore,Mi-1.2gene cannot be a satisfying source of plant resistance to this mite-herbivore generalist.

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