A Comparison of Longevity and Fecundity of Adult Trichogramma platneri (Hymenoptera: Trichogrammatidae) Reared from Eggs of the Cabbage Looper and the Angumouis Grain Moth, with and without Access to Honey

Effect of host availability and egg load in Trichogramma platneri Nagarkatti (Hymenoptera: Trichogrammatidae) and its consequences on progeny quality

“…This may explain the differences in progeny production between large and small females when deprived of hosts. Larger females have potentially greater reproductive success than smaller females, confirming the positive correlations between wasp size and some components of fitness investigated in laboratory experiments (Flanders, 1935;Salt, 1940;Klomp and Teerink, 1967;Marston and Ertle, 1973;Waage and Ng, 1984;Hohmann et al, 1988). However, Kazmer and Luck (1995) demonstrated that average postdispersal fitness of adult T. pretiosum Riley in the field only increased until T. pretiosum reached an intermediate size after which it remained constant.…”

“…They have revealed the importance of feeding the wasps a carbohydrate (Yu et al, 1984;Smith et al, 1986;Hohmann et al, 1988Hohmann et al, , 1989McDougall and Mills, 1997), exposing them to their target hosts before releasing them (Bergeijk et al, 1989), and timing their release (Volkoff and Daumal, 1994;Smith, 1996). The adoption of these recommendations along with maximizing wasp size would certainly improve current biological control programs that use Trichogramma spp.…”

“…However, the decision of whether or not to parasitize a host depends on the number of mature eggs in the female's ovaries and her age (Donaldson and Walter, 1988;Trudeau and Gordon, 1989;Minkenberg et al, 1992;Godfray, 1994). Species of Trichogramma (Hymenoptera: Trichogrammatidae) have been considered proovigenic (Pak and Oatman, 1982) and if hosts are abundant, nearly all of their eggs are laid in the first few days of life (Pak et al, 1985, Hohmann et al, 1988Fleury and Bouletreau, 1993). Pak et al (1985), however, speculated that under host scarcity conditions, females might be able to continue searching over an extended period of time by controlling the ovulation and ovisorption processes.…”

Some Studies on Biology of PentaIonia nigronervosa Conquarrel- The Vector of Banana Bunchy Top Virus

“…Aphid size: After the fecundity has been assessed for 10 lays, adult aphids were collected and preserved in 70 percent ethanol. The body size (length and width) of 30 aphids mounted on microscopic slides in glycerin) and one hind ibia length on each preserved aphid was measured using a nicroscope eyepiece graticule (Hohmann et al, 1988).…”

Effects of artificial diets and floral nectar on parasitization performance of Trichogramma brassicae Bezdenko, 1968 (Hymenoptera: Trichogrammatidae)

“…Parasitization performance of Trichogramma spp. (longevity, fecundity, adult emergence and female emergence) is known to be influenced by extrafloral nectar, pollen, honey, carbohydrate and protein (Ashley & Gonzalez, 1974;Hohmann et al, 1988;Baggen et al, 1999;Jervis et al, 2004;, Shearer & Atanassov, 2004Zhang et al, 2004;Wäckers, 2005;Witting-Bissinger, 2008).…”