Changes in the genetic composition of populations in Chile and frequency of insecticide resistance mutations.

is a cosmopolitan aphid that is highly polyphagous and an important agricultural pest. The subspecies has been described for highly specialized phenotypes adapted to tobacco (). In Chile, the population of was originally composed of a single red genotype that did not possess insecticide resistance mutations.

Evolution of imidacloprid resistance in Myzus persicae in Greece and susceptibility data for spirotetramat.

Background: Myzus persicae s.l. is a major crop pest globally and has evolved resistance to a range of insecticide classes making it increasingly difficult to control in some areas.

Insecticide resistance status of Myzus persicae in Greece: long-term surveys and new diagnostics for resistance mechanisms.

Background: Myzus persicae nicotianae is an important pest in Greece, controlled mainly by neonicotinoids. Monitoring of the aphid populations for resistance mechanisms is essential for effective control.

Results: Two new RFLP-based diagnostics for the detection of the M918T (super-kdr pyrethroid resistance) and nAChR R81T (neonicotinoid resistance) mutations were applied, along with other established assays, on 131 nicotianae multilocus genotypes (MLGs) collected from tobacco and peach in Greece in 2012-2013.

Identity of Schizaphis species (Hemiptera: Aphididae) in the United Kingdom: are they a threat to crops?

The greenbug, Schizaphis graminum (Rondani), is a major pest of cereals in some parts of the world and is of particular concern because it can be resistant to some insecticides and overcome the resistance of crops. In the UK, it has never been found on crops, but two rather little-known and closely-related species (Schizaphis holci and Schizaphis agrostis) are associated with the wild grasses, Holcus lanatus and Agrostis stolonifera. Since 1987, winged (alate) aphids morphologically resembling the greenbug have been found in increasing numbers in 12.

Regulation of wing formation and adult development in an aphid host, Aphis fabae, by the parasitoid Aphidius colemani.

Nymphs of presumptive winged gynoparae of Aphis fabae (Hemiptera: Aphididae), were exposed to female parasitoids, Aphidius colemani (Hymenoptera: Aphidiidae) and stung once with the ovipositor. Wing development was inhibited and, when aphids were parasitised during the early stages, they did not reach the adult stage but mummies with rudimentary or no wingbuds are observed in the host's fourth-stadium. These and previous studies have suggested that wing development may be inhibited by factor(s) from the maternal parasitoid injected into the host at the time of oviposition.