Adult Population Development of Grapholita molesta (Busck 1916) (Lepidoptera: Tortricidae) on Different Fruit Species and Locations

Grapholita molesta is an important pest of stone and pome fruits. In commercial orchards, integrated pest management programs use pheromone traps to monitor the population dynamics of G. molesta and adjust treatments. Phenology models can be used to forecast the population phenology of pests and to help optimise the time point at which to spray the orchards with insecticides. In the present study, the adult population phenologies of G. molesta in two provinces of north-east Spain were studied, as well as their fit to the phenology model most used in both provinces. Weekly captures of adults in pheromone traps through the season were recorded over 5 y in a large number of commercial orchards, and these data were used to determine the number of generations of G. molesta in each province. The results show significant differences between provinces in the generation time, being 97 degree days (DD) shorter in the Lleida province than in the Girona province. In Girona province, four generations were registered, while five were detected in Lleida. As a result of the differences found, the phenology model was not able to predict precisely the population dynamics in the Girona province.

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EFEKTIVITAS INSEKTISIDA DALAM MENEKAN PERKEMBANGAN POPULASI DAN SERANGAN LIRIOMYZA, SP PADA TANAMAN BAWANG MERAH LOKAL PALU (Allium cepa L.x Wakegi Araki) DI DESA GUNTARANO KECAMATAN TANANTOVEA KABUPATEN DONGGALA

Jurnal Agrotech ◽

10.31970/agrotech.v8i1.14 ◽

2018 ◽

Vol 8 (1) ◽

pp. 23-28

Author(s):

Arfan Arfan ◽

Sri Sudewi ◽

Mihwan Sataral ◽

Sumarni Sumarni ◽

Vevi Rosiani ◽

...

Keyword(s):

Allium Cepa ◽

Block Design ◽

Adult Population ◽

Plant Age ◽

Population Development ◽

Randomized Block Design ◽

Insecticidal Treatment

This study aimed to examine the effectiveness of some insecticides on the population development and attack Liriomyza sp on local Palu onions. The research conducted from Februari to April 2017, at Guntarano village, Tanantovea Sub-District, Donggala District. The study used Randomized Block Design (RAK) consisting of four treatments, namely Po.Control; P1. Abamectin; P2. Azadiractin; P3. Dimohipo. Each treatment was repeated three times so that 12 treatments were obtained. The results showed that the insecticidal treatment had an effect on the development of the varied Liriomyza sp. Adult population at various plant age levels. Observations on plant age 5 and 6 of MST showed that abamectin insecticides were effective in suppressing the growth larvae populations of Liriomyza sp compared with the treatment of Azadiractin, Dimohipo and non-treated insecticides.

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Determination of The Prevalence and Population Development of Tomato Leafminer [Tuta absoluta (Meyrick, 1917) (Lepidoptera: Gelechiidae)] in Tomato (Lycopersicon esculentum Mill.) Planting Areas of Sanliurfa Province

ISPEC Journal of Agricultural Sciences ◽

10.46291/ispecjasvol5iss2pp476-491 ◽

2021 ◽

Vol 5 (2) ◽

pp. 476-491

Author(s):

Ayçin AKSU ALTUN

Keyword(s):

Lycopersicon Esculentum ◽

Adult Population ◽

Tomato Leaf ◽

Tuta Absoluta ◽

Leaf Miner ◽

Population Development ◽

Tomato Field ◽

Tomato Leaf Miner ◽

The Village

This study was carried out to determine the extensity, development of population and the state of damage of tomato leaf miner (Tuta absoluta (Meyrick, 1917) (Lepidoptera: Gelechiidae)) in total eight tomato fields located in the villages of Goktepe of Central Sanliurfa, Meteler of Birecik, Kepirce of Bozova, Yalcinkaya of Ceylanpinar, Ovacik of Hilvan, Kucuk Yucelen of Siverek, Aligor of Suruc and Ciftciler of Viransehir in 2011. To determine the extensity of tomato leaf miner each of the 5 districts in the village tomato field was checked by observation whether adult or larvae found in fields T. absoluta. The result showed that tomato leaf miner was common in all the districts. The highest density of tomato leaf miner adult population quantities were 630, 800, 400, 965, 211, 600, 215 and 96 pcs/week in Goktepe of Central Sanliurfa, Meteler of Birecik, Kepirce of Bozova, Yalcinkaya of Ceylanpinar, Ovacik of Hilvan, Kucuk Yucelen of Siverek, Aligor of Suruc and Ciftciler of Viransehir, respectively. Tomato leaf miner harmed the fruits, particularly total in 1st and 2nd harvest of tomato (the end of August- the beginning of September) , if precautions were not taken. Moreover, it was recorded that if the adult population was quite dense in the fields study conducted, there aren’t any undamaged leaves and fruits from T. absoluta.

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