scholarly journals Influence of nitrogen and potassium on tomato nutrition and resistance to Liriomyza sativae (Diptera: Agromyzidae) in greenhouse

Author(s):  
C.M.R. Oliveira ◽  
R.R. Passos ◽  
D. Pratissoli ◽  
A.M. Holtz ◽  
O.J.P. Rangel
Keyword(s):  
2018 ◽  
Vol 36 (3) ◽  
pp. 353-356 ◽  
Author(s):  
Ewerton M Costa ◽  
Francisco EL Silva ◽  
Elton L Araujo

ABSTRACT The leafminer [Liriomyza sativae (Diptera: Agromyzidae)] is one of the main pests of melon crop (Cucumis melo) in the states of Rio Grande do Norte and Ceará. Thus, adopting strategies to control this destructive insect is essential. The aim of this study was to evaluate the effect of aqueous neem seed extract, applied to soil via irrigation, on leafminer larvae, in the melon crop. An experiment was conducted in greenhouse, in completely randomized design, consisting of five treatments (four doses of aqueous neem seed extract: 1; 3; 5 and 10 g/100 mL) and the control consisting only of distilled water and 10 replicates (melon plants). The treatments were applied in a single dose, via soil irrigation. In the first stage of the evaluation, 24 hours after application, the number of dead larvae per plant was counted. In the second step, pupal mortality was recorded. The total mortality was also calculated considering the number of larvae and the number of emerged adults. We verified that, increasing the concentration of aqueous neem seed extract, an increase in the larval and pupal mortality of the leafminer in melon crop was noticed. The concentration 10 g/100 mL presented the best results, resulting in 36.4% of larval mortality, 96.5% of pupal mortality and 96.8% of total mortality.


2018 ◽  
Vol 8 (2) ◽  
pp. 79-84
Author(s):  
Arfan Arfan ◽  
Lisa Indriani Bangkele ◽  
Hasmari Noer

Effect of Frequency and Application of Abamectin Insecticides on Population Abundance and Attack Level of Leafminer Liriomyza, spp. (Diptera: Agromysidae) is one of the main pests on the Lembah Palu red onion, where this pest is relatively new in the Palu Valley. The aim of the study was to examine the effect of frequency and application of insecticides on population abundance, and the attack rate of  L. chinensis (Diptera: Agromyzidae) on the Lembah Palu red onion plant under applied and unapplied insecticide. The treatment of abamectin insecticide was applied once a week with a concentration of 1 ml of formulation per liter of water, beginning at the age of 2 MST and ending at 7 MST. The results showed that there were 2 species of Liriomyza, spp associated with Palu valley red onion i.e. Liriomyza chinensis and Liriomyza sativae. This research found that the application of Abamectin insecticides significantly affected population development and the percentage of Liriomyza, spp. on the lembah Palu red onion.


10.5109/9280 ◽  
2007 ◽  
Vol 52 (1) ◽  
pp. 49-55
Author(s):  
Dang Hoa Tran ◽  
Thi Thien An Tran ◽  
lan Phuong Mai ◽  
Takatoshi Ueno ◽  
Masami Takagi

2005 ◽  
Vol 5 (2) ◽  
pp. 73-81
Author(s):  
Siti Herlinda ◽  
Leny Puspa Rosalina ◽  
Yulia Pujiastuti ◽  
Erizal Sodikin ◽  
Aunu Rauf

Population and damage by Liriomyza sativa (Blanchard) (Diptera : Agromyzidae) and its parasitoid potential on cucumber fields. The objectives of this research were to figure out adult population of L. sativae and the damage caused by the larvae on cucumber leaves, to analyze the relationship between adult population and the number of leaf mining tunnel caused by L. sativae larvae, and to analyze the relationship betweeen the larval abundance and its parasitoids. The highest adult population (7.60 adults per trap) of L. sativae was found on 5 weeks after planting (WAP) and the lowest (3.20 adults per trap) was on 2 WAP. The highest damage intensity was found on 3 weeks after planting, amounted to 36.89% while the lowest was found on 6 weeks after planting, amounted to 12.12%. The regression coefficient showed that each adult of L. sativae caused one leaf mining tunnel. The  higher  the  number of L. sativae  larvae, the  more  the  mining tunnels occured (R = 80.8%). The higher the number of L. sativae larvae in cucumber leaves, the more the larvae parasitized (R = 86.8%). Parasitoids found were Diglyphus sp. (Hymenoptera : Eulophidae) and Neochrysocharis sp. (Hymenoptera : Eulophidae). The highest apparent parasitism was found on 5 weeks after planting, amounted to 41.9%.


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