Short-winged slant-faced grasshopper

The short-winged slant-faced grasshopper (Euthystira brachyptera) is a member of the Acrididae family within the Orthoptera order. It is recognized by its vibrant green or yellowish-green coloration, which provides excellent camouflage.

The species is named for its relatively short wings, which in females typically do not extend to the end of the abdomen, while in males, they reach or slightly overlap the end of the abdomen.

Adult specimens generally measure between 13 and 23 millimeters in length. Their hind legs are robust and well-developed, allowing for powerful jumps when the insect is disturbed by potential predators.

The life cycle proceeds from eggs to nymphs and then to the adult stage. Unlike many desert-dwelling locusts, this species prefers more humid environments such as meadows, forest glades, and moist grasslands.

Overwintering occurs primarily in the egg stage. Eggs are deposited into the soil or plant litter, ensuring protection against cold temperatures throughout the winter season.

This grasshopper is a polyphagous pest, meaning it feeds on a wide range of vegetation including cereal crops, various grasses, and occasionally horticultural plants.

Both nymphs and adults consume leaf tissue. They leave characteristic irregular holes and jagged edges on the leaves, which impairs the plant's ability to perform photosynthesis efficiently.

Feeding damage is particularly critical during the early growth stages of cereal crops, where excessive defoliation can significantly stunt development and reduce grain yield.

In cases of high population density, these pests can cause severe damage to pastures and hayfields, reducing the overall biomass available for grazing livestock.

The wounding of plant tissues also increases water loss through transpiration, which can cause severe stress to the crops, especially during hot and dry summer spells.

Nymphs typically emerge in late spring or early summer, depending on soil temperature and the availability of early spring vegetation which serves as their primary food source.

Adults become prominent during mid-summer, specifically from July through August. This is the period of peak mobility and active reproduction for the species.

Activity levels are highly dependent on weather conditions; warm, dry weather generally accelerates the development of nymphs and increases the frequency of feeding.

As the season nears its end, the focus shifts to mating and egg-laying, ensuring the population's survival for the following year before the adults succumb to cold weather.

Farmers should conduct regular monitoring in fields during the early morning or late afternoon when the grasshoppers are less active and easier to identify.

The primary indicator of an infestation is the appearance of jagged, irregular feeding marks on the leaves. These patterns are distinct from disease-related lesions or fungal spots.

Field inspectors often notice the grasshoppers by observing movement in the crop canopy; they exhibit quick, short jumps when an intruder approaches their location.

Extensive feeding leads to visible yellowing or thinning of the crop stand, which is often observed in patches rather than uniformly across the entire field.

• Irregular holes or scalloped edges on leaves.
• Presence of insect waste (frass) on the foliage.
• Sudden decrease in crop canopy density.
• High concentrations of adults in field margins or weedy areas.

Severe infestations result in stunted crop growth, which ultimately affects the maturation process and results in significant biomass loss at the time of harvest.

Cultural control measures, such as maintaining clean field margins and eliminating weeds, are essential because these areas serve as primary breeding and development sites.

Tillage practices, specifically deep autumn plowing, are highly effective in disrupting the eggs buried in the soil, preventing them from hatching in the subsequent season.

If population numbers exceed the economic threshold, chemical control using approved insecticides can be implemented as a necessary intervention to protect the yield.

Biological control, including the protection of natural predators like birds and parasitic insects, should be integrated into the management plan to keep populations in check.

Always apply pesticides according to the label requirements to ensure maximum efficacy while minimizing the impact on non-target organisms and the surrounding ecosystem.