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...

J. Econ. Enlomol. 74: 30}-308 (1981) Larvae and adults of Phthorimaea operculella (Zeller) in potato foliage were effectively controlled by commercial applications of azinphosmethyl and a combination of methomyl and methamidophos, but eggs and pupae were not significantly affected. Azinphosmethyl, methomyl, and methamidophos provided adequate control of foliar larval populations, but larval par...

Potato tuberworm, Phthorimaea operculella (Zeller), is the most serious insect pest of potatoes worldwide. The introduction of the Bacillus thuringiensis (Bt) toxin gene through genetic engineering offers host plant resistance for the management of potato tuberworm. We report on the field and storage studies to evaluate Bt-cry5 potato lines for resistance to potato tuberworm in Egypt under natu...

J. Eeon. Entomol. 73: 8-11 (1980) Postharvest samples of cull tubers and volunteer plants in commercial potato fields provided a large food resource for Phthorimaea opercu/ella (Zeller) during noncropping periods. In commercial, spring-planted fields sampled in 1977 and 1978, 27.6 and 74.3 surface culls/ 100 m2 and 1092.9 and 1670.0 subsurface culls/100 m2, respectively, were recovered 2 months...

Liquid suspensions and dry formulations of a granulovirus (family Baculoviridae, genus Granulovirus, PoGV) derived from infected larvae and the bacterium Bacillus thuringiensis subsp. kurstaki (Berliner) (Btk) were evaluated for control of the potato tuberworm, Phthorimaea operculella (Zeller) (Lepidoptera: Gelechiidae), in stored tubers. Laboratory bioassays at 25 degrees C showed that both Po...

J. Econ. Enlomol. 72: 599-601 (1979) Time of tuber infestation by Phthorimaea operculeLla (Zeller) was markedly affected by the type of irrigation system employed. Tuber infestation under furrow irrigation was above 25% for 4 wk prior to vine senescence while sprinkler irrigated potatoes sustained less than 5% damage during this period. After irrigation was terminated, infestation increased rap...

potato tuberworm, phthorimaea operculella zeller (lepidoptera; gelechiidae) is a worldwide pest of solanaceous crops. larvae feed inside galleries in foliage, stems and tubers making chemical control unsuccessful, so other control methods should be applied. in recent years many plants have received genes that encode toxic proteins as a strategy to resist insect pests. in this study, optimal ph ...

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...