Effect of some organic and inorganic fertilizers and cyromazine on biological parameters of Liriomyza sativae Blanchard (Diptera: Agromyzidae)

Afshari, Forough (2018) Effect of some organic and inorganic fertilizers and cyromazine on biological parameters of Liriomyza sativae Blanchard (Diptera: Agromyzidae). Masters thesis, University of Mohaghegh Ardabili.

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Abstract

Vegetable leafminer, Liriomyza sativae Blanchard is one of the most important pests of cucumber, especially in greenhouses. In this study, effect of different fertilizer treatments including: control, vermicompost, humic acid, nitrogen, vermicompost- humic acid mixture and vermicompost- humic acid -nitrogen mixture and also the combined effect of these fertilizers with Cyromazine were investigated on biological parameters of vegetable leafminer and some growth indices of cucumber plant including plant height and chlorophyll content. The experiments were carried out in a growth chamber at 25 ± 2˚C, relative humidity of 65 ± 5 %, and a photoperiod of 16 L: 8 D. Based on the results of both studies, the duration of immature stages and longevity of adults were significantly different on the tested treatments. Duration of immature stages was highest on humic acid treatment and lowest on control. Furthermore, the lowest values of longevity and life spans of adults were recorded on humic acid and the highest values of these parameters were on control and nitrogen treatments. The tested treatments had significant effects on population growth parameters of the pest. The highest values of intrinsic rate of natural increase (rm) and net reproductive rate (R0) of the vegetable leafminer were on nitrogen in fertilizer treatments, as well as on control in fertilizers and pesticide treatments. The lowest values of these parameters were on humic acid treatment in both experiments. The results of the present study showed that humic acid, especially along with Cyromazine can be used in integrated management of the vegetable leafminer in cucumber growing.

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