Wasp Nest Identification, Treatment, Control and Life Cycle

Common name: Wasp nest
Scientific name: Trypoxylon politum Say (Hymenoptera: Crabronidae)
Introduction – Distribution – Identification – Treatment or control measures – Selected references

Introduction

There are 3 genera of this wasp: Sceliphron, Trypoxylon and Chalybion.
Mud wasps are familiar wasps with narrow or filiform waists. These solitary wasps belong to a number of related groups, but the common people call them mud wasps because they all build their nests with mud. It can identify the different species of coloration by the peculiar architecture of the nest.


The painter of the yellow and black mud squash (Sceliphron caementarium) constructs nest cells by side or on top of each other; the final product is rounded to the size of a lemon or a fist.
The paintbrush painter in clay tubes (Trypoxylon politum) is black with blue wings, with white “stockings” on the hind legs. It makes vertical, parallel rows of cells; the final product looks like a pipe organ.
The blue clay painter (Chalybion californicum) is a fairly metallic blue; does not build nests but instead reuses those of one of the other species. Instead of mud, it moves water, which is used to soften and remodel the mud of older nests.

Distribution

In almost all of Argentina in the warm provinces with temperatures of 15 ° or more, for the first time they were discovered in the area of ​​Buenos Aires – Vicente López, in 2008.

Identification

Size: Its length is between 12.7 and 25.4 mm.
Habitat and Conservation: Nests are often seen in stables, garages and eaves of houses. In nature, nests are built on entrances to caves, beneath rock protrusions, and in similar places. A female carries clay balls from a puddle near the place where she is building the nest; a cell takes about an hour to build it. to enjoy.
Foods: They place paralyzed spiders in the cells of the nest as provisions for their offspring. Not only does it subject the spider, but it also helps to preserve it, so when the larvae of wasps emerge, they have fresh food. Yellow and black clay wasps prefer crab spiders and other small, colorful species. The third species of which we speak Chalybion californicum use a large number of black widow spiders.

Treatment or Control Measures
The best way is to call specialized pest control companies such as Fumigadora Continente, or prepare a container with charcoal smoke or wood to be able to approach, remove the nests and burn them, then place a repellent gel on the site that is sold in Argentina by the company Sanipro SRL.
Some people would agree that any natural remedy that reduces black widows around the house is a good thing. Due to the blue mud wasps (specializing in hunting black widows) and for this they need the old nests of the other two species, which allows to take into account the clay wasps to build nests where it can be tolerated. Care should be taken not to get too close to their nests, although they rarely bite (they do so only if they feel threatened). They do not defend their nests as much as paper wasps and other social species.

Lifecycle:

They spend the winter as immature individuals in the nests. The painter with a yellow and black mudbrush has two generations each summer. A male “stands guard” while a female is collecting spiders at a distance, in order to protect against other insects that may enter and parasitize the nest. Mating occurs frequently on visits to the nest.

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