for a mass propagation program to have an effective storage protocol, which include
even the pre-storage practices. The sold products also need to be used in appropriate
time, to avoid unfavorable weather conditions and perfect synchrony with the host
aphid outbreaks (Frère et al. 2011).
The mummy is known as best stage for cold storage (Starý 1970a, b). In optimal
condition the mummies can be keep alive for over 1 month (Archer et al. 1973;
Polgar 1986; Hofsvang and Hägvar 1977; Rabasse and Ibrahim 1987; Frère et al.
2011; Mahi et al. 2014; Al-Antary and Abdel-Wali 2016). The mummies of
Acyrthosiphon pisum (Harris), containing mature larvae and pupae of Aphidius
ervi Haliday were kept under 3–10
C for 196–202 days without significant effect
on fecundity and viability (He et al. 1983). On the other hand, the low temperatures
can have a detrimental effect on the emergence rate, sex ratio and adult behavior
(Ismail et al. 2010; Frère et al. 2011; Bourdais et al. 2012). The quality control is a
necessary step in mass rearing (van Lenteren, 2003) of the aphid parasitoids, which
may use various indicators including sex ratio (Silva et al. 2011), Adult size (Pavlik
1993; Ameri et al. 2014) and morphometrics (Ameri et al. 2013; Mohammadi et al.
2015), rate of emergence (Frère et al. 2011), fecundity (Portilla et al. 2013), adult
longevity and ovipostion period (Rezaei et al. 2020). Thorough inspecting of the
colonies for possible contamination with the hyperparasitoids both at the time of
rearing and in products is necessary, since they can destroy all the colonies.
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