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Larval Diptera feed in leaf-litter, in leaves, stems, roots, flower and seed heads of plants, moss, fungi, rotting wood, rotting fruit or other organic matter such as slime, flowing sap, and rotting cacti, carrion, dung, detritus in mammal bird or wasp nests, fine organic material including insect frass and micro-organisms.
Adults are small (< 2 millimetres (5 ⁄ 64 in)) to medium-sized insects (- < 10 millimetres (25 ⁄ 64 in)). Larger Diptera are rare, only certain families of Diptera Mydidae and Pantophthalmidae reach 95–100 millimetres (3 + 3 ⁄ 4 –4 in) wingspan while tropical species of Tipulidae have been recorded at over 100 millimetres (4 in).
Platycheirus rosarum is a species of hoverfly found in the Holarctic realm.Like its close relative Platycheirus granditarsus, it can be found in marshy meadows and ditches; indeed, the two species can often be found together.
The female of some species waits for army ants to flush out a target, then she dives in and jabs an egg into the host. The Stylogaster larvae then develop as endoparasitoids . This is a remarkably high-risk behavior, in that many hosts are captured and killed by the ants after a female has laid an egg in it, so many eggs are lost.
Rose scale (order Hemiptera: family Coccoidea) Aulacaspis rosae – Mainly found on the stems and branches of the plant, lack of control will allow the pest to spread to flower stalks and petioles. At this point the plant would be stunted, spindly and with a white, flaky crust of scales on the bark.
Urophora sirunaseva produces larvae that pupate within a woody gall within the flower and disrupt seed production. [6] Chaetorellia acrolophi is an effective biocontrol agent against knapweeds Chaetorellia australis and Chaetorellia succinea, deposit eggs into the starthistle seedheads, where their larvae consume the seeds and flower ovaries. [7]
Platycheirus granditarsus, the Hornhand Sedgesitter, is a species of hoverfly.It is found in many parts of Britain North America and Europe.Typical habitat includes marshy meadows and ditches, where it can be found between May and October, though it is at its commonest between July and September.
While the female blowfly typically lays 150–200 eggs per batch, she is usually iteroparous, laying around 2,000 eggs during the course of her life. The sex ratio of blowfly eggs is usually 50:50, but one exception is females from two species of the genus Chrysomya ( C. rufifacies and C. albiceps ), which are either arrhenogenic (laying only ...
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