Population change and distribution of Frankliniella occidentalis (Pergande) (Thysanoptera: Thripidae) in strawberry greenhouses

Year 2019, Volume: 3 Issue: 2, 106 - 111, 28.06.2019

Sevgi Gokkaya İsmail Karaca

https://doi.org/10.31015/jaefs.2019.2.9

Abstract

Plant
protection has an important place among problems related to strawberry
cultivation. Red spider mites and thrips are the main pests observed on
strawberries, and among these, the most important for Antalya province is Frankliniella occidentalis (Pergande)
(Thysanoptera: Thripidae).

This study was performed in 2017 and
determined the population change and in-greenhouse distribution of Frankliniella occidentalis with direct counts on flowers and blue traps
in three strawberry greenhouses in Serik county in Antalya province. The
research was completed in three different greenhouses, with 25 blue sticky
traps in the 1st greenhouse with 4 da size and the 2^nd greenhouse with
3.5 da size and 15 traps in the 3^rd greenhouse with 2.5 da size.

Traps
were collected each week, with the numbers of thrips recorded. On dates when
the traps were changed, the thrips found on plants were counted by examining
ten flowers on three plants below or close to the blue sticky traps by eye or
with a loupe with counts performed until the day of harvest.

At the end of the study, the pest
population reached a certain level from the start of flowering in November in
the three greenhouses, and then fell in the middle of December. From the middle
of December, the population began to increase and this increase continued until
the strawberries were harvested. The number of pests per trap varied from 0.6
to 1904.2. When the whole production season is considered, the mean pest numbers
per trap in the three greenhouses were 287.2, 72.3 and 271.27 thrips/trap. The
number of pests per flowerhead varied from 0.0 to 2.5. When the whole
production season is considered, the mean numbers of pests per flowerhead in
the greenhouses were 0.26, 0.08 and 0.16 thrips/flowerhead.

In light of the data obtained in
the study, and considering the economic damage threshold value recommended by
previous research results, it was concluded there is no need for chemical
intervention against F. occidentalis in the region.

Keywords

Antalya, Greenhouse, Population change, Western flower thrips

Supporting Institution

Süleyman Demirel University Scientific Research Projects Coordination Unit

Project Number

4999-YL1-17

Thanks

We thank Süleyman Demirel University Scientific Research Projects Coordination Unit for material support of this study with project number 4999-YL1-17

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