When they get infested with aphids, do we think about their enemy, the praying mantis?
How many aphids can he eat in a day?
After he eats all the aphids, what are we going to do, starve him, or buy more aphids?
While the majority of the Thysanoptera are thus vegetarian in their diet, and are frequently injurious in farm and garden, some species, at least occasionally, adopt a predaceous habit, killing aphids and small mites (so-called " red-spiders ") and sucking their juices.
The relation between ants and aphids has often been compared to that between men and milch cattle.
Lubbock (Lord Avebury) states that the common British yellow ants (Lasius flavus) collect flocks of root-feeding aphids in their underground nests, protect them, build earthen shelters over them, and take the greatest care of their eggs.
Niger), go after the aphids that frequent the shoots of plants.
Webster has observed ants, foreseeing this emigration, to carry aphids from apple trees to .grasses.
Biisgen that the sweet secretion (honey-dew) of the aphids is not derived, as generally believed, from the paired cornicles on the fifth abdominal segment, but from the intestine, whence it exudes in drops and is swallowed by the ants.
Besides the aphids, other insects, such as scale insects (Coccidae), caterpillars of blue butterflies (Lycaenidae), and numerous beetles, furnish the ants with nutrient secretions.
In various groups of the Hexapoda - aphids and some flesh-flies (Sarcophagi), for example - the egg undergoes development within the body of the mother, and the young insect is born in an active state; such insects are said to be " viviparous."
In other gallflies and in aphids we find that a sexual generation alternates with one or with many virgin generations.
C. Bonnet indeed observed in 1745 the virgin-reproduction of Aphids, but it was not until 1842 that R.
Other flies of this group have the inquiline habit, laying their eggs in the galls of other species, while others again pierce the cuticle of maggots or aphids, in whose bodies their larvae live as parasites.
Rtµc-, half and irmpov, a wing), the name applied in zoological classification to that order of the class Hexapoda (q.v.) which includes bugs, cicads, aphids and scaleinsects.
They feed entirely by suction, and the majority of the species pierce plant tissues and suck sap. The leaves of plants are for the most part the objects of attack, but many aphids and scale-insects pierce stems, and some go underground and feed on roots.
The enormous rate at which aphids multiply under favourable conditions makes them of the greatest economic importance, since the growth of immense numbers of the same kind of plant in close proximity - as in ordinary farm-crops - is especially advantageous to the insects that feed on them.
Homoptera This sub-order includes the cicads, lantern-flies, frog-hoppers, aphids and scale-insects.
The development of Aphids has been dealt with by T.
The lacewing-flies (q.v.), however, of which there are two families, the Hemerobiidae and Chrysopidae, whose larvae feed on Aphids, sucking their juices, are represented in our fauna.