Almost all the birds are very active predators of grasshoppers, especially in the period in which to look after children. Guinea fowl, in particular, may be employed to contain the infestations in the vicinity of corporate centers, holiday cottages and homes. Numida meleagris, pharaos images
There are also several preparations of biological origin potentially active, on locusts and newborn being tested. However, are not yet recorded in Italy and, accordingly, are not yet usable on a wide scale.
After some experience in the '80s, the biological control of locusts through the use of Pharaoh, was revived on a large scale in recent years. In some provinces of the region have been implemented some successful pilot initiatives subsequently adopted in other Italian regions.
The locusts have other natural enemies: among the main are the entomopathogenic fungus Entomophthora grylli, that attacks and kills the adults, and the beetle meloide Epicauta rufidorsum, whose larva lives in the soil and is very active in prey eggs. The action of these factors of containment natural must be preserved even if, often, is not sufficient to contain the most serious infestations.
Some microorganisms (fungi, bacteria and protozoa) favored by high humidity and rainy seasons, causing life-threatening infections. Small insectivorous mammals (hedgehogs, mice and shrews), most of wild animals (guinea fowl, ducks, and turkeys) and many wild birds (partridges, pheasants, quail, sparrows and raptors -kestrels and buzzards-). Even more effective are the arthropods and between these spiders and, especially, insects. This year was found a high presence of Meloidi beetles, whose larvae actively prey on the eggs of grasshoppers in the ground.
These factors limiting natural, though important, are not sufficient to reduce quickly the pulses may grasshoppers.
During the birth of nymphs or otherwise on the first juveniles are possible attempts to contain the infestation with suitable mechanical means (eg rollers), making interventions in the evening or at night when the nymphs are concentrated and property. Speaking with the same criteria you can get good results even with mobile vacuums, and barriers (and other networks) can be used to defend the gardens or other urban environments. These barriers can be combined with insecticidal baits based on spinosad (+), a product of natural origin low toxicity to people and pets that in any case be used in a localized manner.
(+) It is used a bait, based on spinosyn, derived from the metabolism of fermentation of a bacterium attinomicete (Saccharopolyspora spinosa) found in soil. The spinosyn is toxic to bees. So I am personally against the use of this fungus, almost harmless to humans but highly toxic to bees. We need bees! .....
All interventions to fight, to be effective, must be made before the dispersal of adult locusts.
P.S. Here, in Italy, it is possible to buy larvae of Epicauta rufidorsum, at the main agricultural consortia.