host preference and biology of potato tuberworm, phthorimaea operculella (zeller) (lep.:gelechiidae), on leaves of 12 potato germplasm in greenhouse
نویسندگان
چکیده
the potato tuberworm, phthorimaea operculella (zeller), is a major pest of potato in both store and field. in this research, host preference, biology and life table parameters of this pest were studied on leaves of 12 potato germplasm including seven commercial cultivars (agria, ausonia, sprit, satina, savalan, kondor, morene) and five iranian clones (pi396156-5, pi397045-15, pi397097-2, pi397082-2, pi396124) in a greenhouse at 25 ± 2ºc, 60 ± 5% rh and photoperiod 14:10 (l:d). in choice experiments, one potted plant from each of 12 tested germplasm were placed in a circle inside the cage (1×1×1.5 meter), then 12 pairs adults (one-day-old) were released inside the cage. after one week, numbers of mines per plant and number of live larvae per plant were counted. the results indicated that the lowest percentage of injured leaflets and the lowest live larvae (5.1, 4.8) were observed on pi397097-2 among the tested germplasm. in no-choice experiments, development time of larvae and pupa, survival rate of larvae and pupa, weight of pupa and life table parameters of the potato tuberworm reared on the leaves of each of 12 tested germplasm were determined. the development time of larvae, pupa and generation time on pi397097-2 were significantly higher than those on the other studied germplasm. the lowest weight of pupa, the lowest survival rate of larvae and the lowest intrinsic rate of increase (0.076) and innate rate of increase (1.079) were observed on pi397097-2. therefore, it can be concluded that clone pi397097-2 is the least suitable for the potato tuberworm among the tested germplasm.
منابع مشابه
biology of potato tuberworm, phthorimaea operculella (lepidoptera: gelechiidae), on the leaves of ten potato cultivars under
the potato tuberworm, phthorimaea operculella (zeller) (lepidoptera: gelechiidae), is one of the most damaging pests of cultivated potato (solanum tuberosum l.) crop, in both field and stores in tropical and subtropical regions. the biological parameters of this pest were evaluated in the growth chamber at 24±1ºc, 65±5% rh and photoperiod of 14:10 h (l:d) on leaves of ten potato cultivars, agri...
متن کاملComparative Life Tables of the Potato Tuberworm, Phthorimaea operculella, on Leaves and Tubers of Different Potato Cultivars
The potato tuberworm, Phthorimaea operculella Zeller (Lepidoptera: Gelechiidae), is a serious pest of the potato, Solanum tuberosum L. (Solanales: Solanaceae), in both fields and stores in tropical and subtropical regions. In the present study, the susceptibility of different potato cultivars to P. operculella was evaluated by measuring life table parameters. Tests were undertaken with leaves a...
متن کاملمقاومت تعدادی از ارقام تجاری و ژنوتیپ های سیب زمینی نسبت به بید سیب زمینی، phthorimaea operculella (zeller) resistance of some potato cultivars and genotypes to the potato tuberworm, phthorimaea operculella (zeller)
abstract: the potato tuberworm, phthorimaea operculella (zeller), is an important insect pest of potato (solanum tuberosum l.) in the storage and field in most parts of the world especially in tropical and subtropical regions due to its close relationship with the host, high reproductive potential and high economic losses. information on host preference, life table parameters and digestive en...
Resistance of potato germplasm to the potato tuberworm (Lepidoptera: Gelechiidae).
The evaluation of potato germplasm for resistance to potato tuberworm, Phthorimaea operculella (Zeller) (Lepidoptera: Gelechiidae), is a valuable component of integrated pest management; however, few attempts have been made to identify natural genetic tuber resistance to tuberworm on potato germplasm. The objective of this study was to screen potato germplasm with potential tuberworm resistance...
متن کاملCharacterization of a newly established potato tuber moth (Phthorimaea operculella Zeller) cell line.
BACKGROUND & OBJECTIVE Potato tuber moth (PTM), Phthorimaea operculella Zeller is a widely distributed, devastating pest of potatoes attacking the foliage and infest the tubers in both field and store causing serious economic damage. As application of PTM granulovirus (PTM-GV) has shown significant reduction in damage, attempts were made to develop a new cell line from this insect to grow PTM-G...
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عنوان ژورنال:
حفاظت گیاهانجلد ۲۷، شماره ۲، صفحات ۲۳۱-۰
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