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The scientific name *Teleogryllus emma* (Ohmachi & Matsuura) belongs to the order Orthoptera, family Gryllidae. It was previously known as *Gryllus mitratus* Burmeister. This species is widely distributed across the country and is commonly found in agricultural areas.
**Host Plants**
This cricket is a polyphagous pest that can feed on a wide range of crops, including soybeans, mung beans, sesame, peanuts, sweet potatoes, potatoes, corn, sorghum, millet, cotton, wheat, sugarcane, tea, mulberry, and rapeseed. In large numbers, they can cause significant damage by feeding on leaves, flowers, and even roots. They are also known to chew through clothing and stored food products.
**Damage Symptoms**
The primary damage is caused by their feeding behavior, which results in leaf notches or holes. In some cases, they may attack flower buds or root systems, leading to reduced crop yield and quality.
**Morphological Features**
Male crickets measure 22–24 mm in length, while females are slightly larger, ranging from 23–25 mm. The body is dark brown with a black head. The compound eyes are surrounded by an orange-yellow ring, forming an "eight" shape when viewed from behind. The pronotum is dark brown, and there are faint dark brown markings resembling horns. The side panels of the thorax are dark, with the front lower corner appearing orange-yellow. The middle of the mesothoracic membrane has a small central incision.
The male forewings are dark brown and shiny, ending in a rectangular mirror-like structure. The leading edge is slightly curved, and within the mirror, cross veins divide it into two sections. The net area at the end contains several longitudinal veins and smaller horizontal veins, creating a grid-like pattern. There are four oblique veins, with the first two being short, and the sub-vein having six branches. The hind wings are long and extend beyond the abdomen. The hind legs have 5–6 pairs of long spines, with the base segment longer than the middle and end segments.
In females, the forewings are as long as the abdominal tip, and the hind wings extend similarly. The ovipositor is longer than the femoral section of the hind leg.
**Life Habits**
This species completes one generation per year. Eggs overwinter in the soil and hatch into nymphs from April to May of the following year. After six molts, adults emerge between May and August. Adults mate and lay eggs from September to October. Females typically lay 34–114 eggs in the soil, 2 cm deep, in weedy areas, fields, or graveyards. Both adults and nymphs are nocturnal, foraging and mating at night. They exhibit phototaxis, meaning they are attracted to light sources.
**Control Methods**
(1) **Poison Bait Trapping**: During the seedling stage, apply 50% phoxim EC at a rate of 50–40 ml per 667 m². Mix with 30–40 kg of fried maimaifu, soybean cake, or cottonseed cake, then combine with water and apply to the field. Alternatively, mix 50–60 ml of 50% phoxim EC with 75 kg of fine soil and use it as bait. This method achieves over 90% insecticidal effect. When applying, start from the field edges and work inward for maximum coverage.
(2) **Light Trapping**: Adult crickets can be effectively controlled using light traps, which attract them during their active hours.