Results of studies with Trichogramma in Brazil are presented, especially those developed at
ESALQ/USP in the past two decades (1984-2004). The project involved taxonomy, rearing …

Biological control of insect pests relies on the ability of natural enemies to limit pest
populations. The behaviours expressed by natural enemies against their prey or hosts are …

Plants can defend themselves against herbivorous insects before the larvae hatch from eggs
and start feeding. One of these preventive defence strategies is to produce plant volatiles, in …

The patch exploitation strategy of females of the insect parasitoid Trichogramma brassicae
was studied on patches containing different proportions of hosts that were previously …

Biological control uses living organisms like bacteria, fungi, nematodes, insects or mites
(including viruses) for the control of weeds or pests and diseases of crop plants. Information …

Many agricultural pests can be harboured by alternative host plants but these can also
harbour the pests' natural enemies. We evaluated the capacity of non-cotton plant species …

The surface and structure of the chorion of eggs of Diatraea saccharalis (F.)(Lepidoptera:
Crambidae), Anticarsia gemmatalis (Huebner), Heliothis virescens F., Spodoptera …

Environmental variables may markedly influence egg parasitoid performance and must be
considered when choosing the best release strategy. Thus, this study aimed to investigate …

Trichogrammatid egg parasitoids are the most promising biological control agents for
inundative releases against Lepidopteran pests. Trichogramma brassicae Bezdenko is an …

In this chapter, we briefly review the major factors that influence parasitoid sex ratios and
then examine theory and evidence (or lack of evidence) for how each of these affect the …