Life-history traits of the predacious miteEuseius scutalis(Athias-Henriot) (Acari: Phytoseiidae) on eggs of three insects (Lepidoptera: Noctuidae)

The availability of rearing Neoseiulus cucumeris (Oud.) and Neoseiulus barkeri (Hughes) (Acari: Phytoseiidae) on three insect egg species

“…Although these values were the highest, they are still lower than the R o values when both phytoseiid mites were fed on spider mites or plant pollen. Similar results were obtained by Momen and El-Sawi (2008) who mentioned that R o of E. scutalis was highest on eggs of S. littoralis and S. exigua, and the lowest on A. ipsilon eggs. Concerning the intrinsic rate of natural increase (r m ), which is the rate of increase of an insect or mite species under specific physical conditions, in unlimited environment, the effects of increasing density do not need to be considered (Birch 1948).…”

“…The lowest fecundity was obtained, when the predatory mites were provided by S. cerealella eggs. Similar results were obtained by Momen and El-Sawi (2008) who mentioned that the fecundity of E. scutalis was highest on eggs of S. littoralis and S. exigua and the lowest was on A. ipsilon eggs. Results in Table 5 also showed that there was a significant difference between the total deposited eggs of the two predatory mites by feeding on A. kuehniella and S. cerealella.…”

“…Contradictory, Romeih et al (2004) who found that Neoseiulus (Amblyseius) californicus (McGregor) failed to feed on Corcyra cephalonica eggs and could not complete its life cycle. These results also incorporated with Romeih et al (2004) and Momen and El-Sawi (2008) who reared Euseius scutalis on S. littoralis and S.exigua Huber and Agrotis ipsilon (Hufnagel) eggs as alternative food sources and found that the total developmental time of the immature stages was the shortest on eggs of S. littoralis. Also, Fouly et al (2013) noticed that Bemisia tabaci gave the longest life cycle of the predatory mite E. scutalis, followed by the immature stages of T. urticae, while plant pollen gave the shortest life cycle.…”

“…Therefore, it can be concluded that both N. cucumeris and N. barkeri were able to feed and complete their developmental periods on eggs of A. kuehniella, S. littoralis, and S. cerealella as alternative food sources. These results are supported by the findings of El-Sawi and Momen (2005) and Momen and El-Sawi (2008). Contradictory, Romeih et al (2004) who found that Neoseiulus (Amblyseius) californicus (McGregor) failed to feed on Corcyra cephalonica eggs and could not complete its life cycle.…”

Influence of Alternative Food Sources on Different Biological Aspects of Cydnoseius negevi (Acari: Phytoseiidae) تأثير مصادر الغذاء البديلة على النواحي البيولوجيه المختلفه للمفترس الأکاروسي Cydnoseius Negevi (Acari: Phytoseiidae)

“…Therefore, it can be concluded that males and females of C. negevi were variably able to feed and successfully survive feeding on spider mites as well as other tested alternative food sources such as date palm pollen and eggs of S. littoralis, T. ricini and A. Kuehniella (Tables 1 & 2). Similarly, El-Sawi and Momen (2005) and Momen and El-Sawi (2008) and Al-Shammery (2018) showed that phytoseiid mites E. scutalis, N. cucumeris and N. barkeri completed successfully their development feeding on A. kuehniella, S. littoralis, and S. cerealella eggs. Inconsistent, N. (Amblyseius) californicus (McGregor) didn't accept Corcyra cephalonica eggs as food source and, therefore, could not complete its development (Romeih et al, 2004).…”