Inherited Effects in F1 Progeny of Partially Sterile Male Phthorimaea operculella (Lepidoptera: Gelechiidae)

Biological Control of <I>Lobesia botrana</I> (Lepidoptera: Tortricidae) Larvae by Using Different Formulations of <I>Bacillus thuringiensis</I> in 11 Vine Cultivars Under Field Conditions

“…It is worth noting that the fecundity of F 1 females obtained in our study from male parents irradiated with 150 Gy and mated with unirradiated males was not significantly different from that of unirradiated moths. This finding is similar to those reported by Makee and Saour (1997) and Bloem et al (2003) in F 1 progeny of P. operculella and C. leucotreta, respectively.…”

Effect of inherited sterility and Bacillus thuringiensis on mortality and reproduction of Phthorimaea opercullela Zeller (Lepidoptera: Gelechiidae)

“…The percentage hatchability of eggs laid by F 1 progeny of irradiated parents was markedly lower than that of nonirradiated parents and did not change regardless of the B. thuringiensis concentration. This proves high sterility in their progeny, which was inherited from irradiated parents, as previously reported (Makee and Saour, 1997, 2003, 2004. The results summarized above prove that a combination of irradiation and B. thuringiensis leads to markedly deleterious effects on the survival and reproduction of F 1 progeny of P. operculella.…”

“…In the present study, the efficiency of the integration of such technique with B. thuringiensis application so as to control P. operculella was determined. 560 H. MAKEE et al Irradiation remarkedly increased the mortality of F 1 progeny of P. operculella, as previously reported (Makee and Saour, 1997). B. thuringiensis had a clear effect on the mortality of F 1 progeny of P. operculella, whether they were from irradiated or nonirradiated parents (Table 1).…”

“…Our previous studies showed that such changes were noticed in F 1 progeny of P. operculella by prolonging the developmental time, reducing fecundity and fertility, and distorting the sex ratio in favor of males (Makee and Saour, 1997, 2003, 2004. In the present study, the efficiency of the integration of such technique with B. thuringiensis application so as to control P. operculella was determined.…”

“…The sterile insect technique (SIT) and inherited sterility technique (IST) are expected as alternative control methods for this pest (Makee and Saour, 1997, 2003, 2004. IST was more effective than SIT in reducing P. operculella populations.…”