The term wasp is typically defined as any insect of the order Hymenoptera and suborder Apocrita that is neither a bee nor an ant.Almost every pest insect species has at least one wasp species that preys upon it or parasitizes it, making wasps critically important in natural control of their numbers, or natural biocontrol. Parasitic wasps are increasingly used in agricultural pest control as they prey mostly on pest insects and have little impact on crops.
The majority of wasp species (well over 100,000 species) are "parasitic" (technically known as parasitoids), and the ovipositor is used simply to lay eggs, often directly into the body of the host. The most familiar wasps belong to Aculeata, a division of Apocrita, whose ovipositors are adapted into a venomous sting, though a great many aculeate species do not sting. Aculeata also contains ants and bees, and many wasps are commonly mistaken for bees, and vice-versa. In a similar respect, insects called "velvet ants" (the family Mutillidae) are technically wasps.
The suborder Symphyta, known commonly as sawflies, differ from members of Apocrita by lacking a sting, and having a broader connection between the mesosomaand metasoma. In addition to this, Symphyta larvae are mostly herbivorous and "caterpillarlike", whereas those of Apocrita are largely predatory or parasitoids.
A much narrower and simpler but popular definition of the term wasp is any member of the aculeate family Vespidae, which includes (among others) the genera known in North America as yellowjackets (Vespula and Dolichovespula) and hornets (Vespa); in many countries outside of the Western Hemisphere, the vernacular usage of wasp is even further restricted to apply strictly to yellowjackets (e.g., the "common wasp").
Nesting habits
The type of nest produced by wasps can depend on the species and location. Many social wasps produce nests that are constructed predominantly from paper pulp or simply put, chewed up wood fibres. The kind of timber used varies from one species to another and this is what can give many species a nest of distinctive colour. Social Wasps also use other types of nesting material that become mixed in with the nest and it is common to find nests located near to plastic pool or trampoline covers incorporating distinct bands of colour that reflect the inclusion of these materials that have simply been chewed up and mixed with wood fibres to give a unique look to the nest. Again each species of social wasp appears to favour their own specific range of nesting sites. of course nature is fickle and you do see exceptions but some like D. media and D. sylvestris prefer to nest in trees and shrubs, others like V. germanica like to nest in cavities that include holes in the ground, spaces under homes, wall cavities or in lofts. By contrast solitary wasps are generally parasitic or predatory and only the latter build nests at all. Unlike honey bees, wasps have no wax producing glands. Many instead create a paper-like substance primarily from wood pulp. Wood fibers are gathered locally from weathered wood, softened by chewing and mixing with saliva. The pulp is then used to make combs with cells for brood rearing. More commonly, nests are simply burrows excavated in a substrate (usually the soil, but also plant stems), or, if constructed, they are constructed from mud.
Solitary wasps
The nesting habits of solitary wasps are more diverse than those of social wasps. Mud daubers and pollen wasps construct mud cells in sheltered places typically on the side of walls. Potter wasps similarly build vase-like nests from mud, often with multiple cells, attached to the twigs of trees or against walls. Most other predatory wasps burrow into soil or into plant stems, and a few do not build nests at all and prefer naturally occurring cavities, such as small holes in wood. A single egg is laid in each cell, which is sealed thereafter, so there is no interaction between the larvae and the adults, unlike in social wasps. In some species, male eggs are selectively placed on smaller prey, leading to males being generally smaller than females.
Social wasps
The nests of some social wasps, such as hornets, are first constructed by the queen and reach about the size of a walnut before sterile female workers take over construction. The queen initially starts the nest by making a single layer or canopy and working outwards until she reaches the edges of the cavity. Beneath the canopy she constructs a stalk to which she can attach several cells; these cells are where the first eggs will be laid. The queen then continues to work outwards to the edges of the cavity after which she adds another tier. This process is repeated, each time adding a new tier until eventually enough female workers have been born and matured to take over construction of the nest leaving the queen to focus on reproduction. For this reason, the size of a nest is generally a good indicator of approximately how many female workers there are in the colony and some hornets' nests eventually grow to the size of beach balls. Social wasp colonies often have populations of between three and ten thousand female workers at maturity, although a small proportion of nests are seen on a regular basis that are over three feet across and potentially contain upwards of twenty thousand workers and at least one queen. What has also been seen are nests close to one another at the beginning of the year growing quickly and merging with one another to create nests with tens of thousands of workers. Polistes Some related types of paper wasp do not construct their nests in tiers but rather in flat single combs.
Use of Wasp in Traditional Siddha Medicine
Decoction of KULAVI KOONDU (குளவிக் கூண்டு WASP NEST )
Wasp nest, wood apple seed, parched paddy and Piper longum are fried by adding honey and a decoction (kudineer) is prepared from this mixture.
This decoction is used to control hiccup.
Note:
All the above details given are for information purpose only. It is not advisable to do medication yourself. It is strongly recommended to consult a qualified Siddha Physician before taking any Siddha Medication.Note:
Sources: Wikipedia, Siddha Materia Medica
Photos: By author
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