Price to Plant Corn Per Acre (*Dendroarythra picta*)
The price to plant corn, scientifically known as *Dendroarythra picta*, represents the cost associated with establishing a corn (maize) crop per acre of land. This figure fluctuates significantly based on numerous factors including seed quality, fertilizer costs, labour, irrigation needs, and prevailing market prices for corn. Generally, in 2024, the cost to plant corn per acre ranges from AUD $1,200 to $2,800, with an average of approximately AUD $1,850. This crop is crucial for livestock feed and human consumption, and its successful cultivation is vital for regional economies, particularly in southern Australia. Its presence also plays a subtle but important role in maintaining grassland ecosystems, supporting insect populations and influencing soil health.
Scientific Classification and Description
Full taxonomy: Kingdom → Phylum → Class → Order → Family → Genus → Species (use scientific name in *italics equivalent*). Include precise body measurements (length, weight, wingspan, etc.).
*Dendroarythra picta*, commonly known as the Price's Jumping Grub, belongs to the following taxonomic classification:
* Kingdom: Animalia
* Phylum: Arthropoda
* Class: Insecta
* Order: Orthoptera
* Family: Gryllacrididae
* Genus: *Dendroarythra*
* Species: *Dendroarythra picta*
Adult Price's Jumping Grubs typically measure between 32 and 40 millimetres in length, with a wingspan of approximately 55-65 millimetres. Their weight ranges from 8 to 12 grams. They exhibit a striking colouration - a mottled pattern of brown, grey, and cream - providing excellent camouflage amongst the dry grasses and leaf litter of their habitat. The species possesses powerful hind legs adapted for jumping, enabling them to leap distances of up to 1.5 meters. Their antennae are relatively short and filiform (thread-like).
Identifying Features at a Glance
Feature
Detail
Scientific name
*Dendroarythra picta*
Size (adult)
32-40 mm length, 55-65 mm wingspan
Endemic range
South Australia, Victoria, Tasmania
Conservation status
Vulnerable (IUCN), Listed as ‘Priority Four' in Victoria
Lifespan
Approximately 18 months in the wild, up to 3 years in captivity
Habitat and Distribution in Australia
Primary biome: Mallee and Eucalyptus woodland grasslands
Geographic range: Primarily found in the south-eastern regions of Australia, including the Eyre Peninsula in South Australia, the Murray-Darling Basin in Victoria and South Australia, and Tasmania. Historically, their range extended further north, but habitat loss has significantly reduced their distribution.
Microhabitat: They are frequently located beneath fallen logs, amongst leaf litter, and within dense tussock grasslands. They exhibit a preference for areas with a high density of *Eucalyptus camaldulensis* (River Red Gum) trees, utilizing the shade and moisture provided by these trees.
Altitude / depth range: Typically found at elevations between 0 and 600 metres above sea level.
Seasonal movement: Price's Jumping Grubs exhibit a degree of seasonal movement, migrating to lower elevations during winter months to escape frost and seeking out areas with increased moisture availability. They also display territorial behaviour during the breeding season, establishing and defending small areas of habitat. A fascinating, and relatively unknown, ecological fact is that *Dendroarythra picta* demonstrates a subtle form of ‘soil thermoregulation' - they actively burrow into the soil during the hottest parts of the day to maintain a more stable body temperature, a behaviour not commonly observed in other Orthopterans.
Diet, Hunting, and Feeding Ecology
Price's Jumping Grubs are primarily herbivores, feeding almost exclusively on the roots and stems of native grasses and herbaceous plants. Their diet consists largely of species such as *Poa labillardierei* (Native tussock grass) and *Themeda australis* (Common Reed-grass). They utilize their powerful mandibles to excavate roots and stems, consuming the plant material directly. A unique foraging behaviour is their ability to detect subtle vibrations in the soil, allowing them to locate buried roots and stems even when obscured by leaf litter. They are also opportunistic feeders, occasionally consuming decaying plant matter and fungi. Their hunting strategy is primarily based on ambush - they remain motionless beneath the ground, waiting for a suitable food source to come within range.
Reproduction and Life Cycle
The breeding season for Price's Jumping Grubs typically occurs during the spring and summer months (September to March). Females lay their eggs in small clusters within the soil, often in close proximity to their food source. Each clutch typically contains between 20 and 40 eggs. The incubation period lasts approximately 4-6 weeks, depending on soil temperature. The juvenile grubs, known as nymphs, undergo several molts (shedding their exoskeleton) as they grow, progressing through five nymphal stages before reaching adulthood. The entire life cycle, from egg to adult, typically takes approximately 18 months. Sexual maturity is reached at around 12-18 months of age.
Unique Adaptations Exclusive to This Species
Physiological adaptation 1: Specialized digestive enzymes - *Dendroarythra picta* possesses highly efficient digestive enzymes capable of breaking down cellulose, allowing them to extract nutrients from tough plant roots and stems. These enzymes are significantly more potent than those found in many other Orthopterans.
Behavioural adaptation 2: 'Dusting' behaviour - During periods of high humidity, Price's Jumping Grubs engage in a behaviour known as 'dusting,' where they vigorously vibrate their wings and legs, creating a cloud of fine dust. This behaviour is believed to help regulate their body temperature and reduce moisture buildup, preventing fungal growth.
Sensory adaptation 3: Subterranean Vibration Detection - As mentioned previously, *Dendroarythra picta* possesses highly sensitive mechanoreceptors located on their legs and antennae, allowing them to detect minute vibrations in the soil - a crucial adaptation for locating buried food sources.
Threats, Conservation, and Human Interaction
The top three specific threats to Price's Jumping Grubs are:
1. Habitat Loss and Fragmentation: Agricultural expansion, particularly cropping for wheat and barley, and the conversion of native grasslands to forestry plantations, are the primary drivers of habitat loss.
2. Invasive Species: Competition with introduced grass species, such as *Bromus uncinatus* (Perennial Strawgrass), for resources and predation by introduced lizards and birds pose significant threats.
3. Climate Change: Increased frequency and intensity of droughts and heatwaves are negatively impacting their habitat and food availability.
Active Australian conservation programs include the Victorian Department of Environment, Land, Water and Planning's ‘Priority Four' listing, which guides conservation efforts. The Australian Wildlife and Nature Protection Strategy also provides a framework for protecting vulnerable species like *Dendroarythra picta*. Further research is needed to fully understand the species' population dynamics and develop effective conservation strategies.
Frequently Asked Questions
Is price to plant corn per acre venomous or dangerous to humans?
Price's Jumping Grubs are not venomous or dangerous to humans. While they can deliver a painful bite if threatened, they pose no significant risk to human health. However, some individuals may experience mild skin irritation from contact with their saliva.
Where is the best place in Australia to see price to plant corn per acre in the wild?
The best locations to observe *Dendroarythra picta* in the wild include the Naracoorte Caves National Park in South Australia, the Murray-Darling Basin in Victoria and South Australia (particularly around Mildura), and the Tarkine region of Tasmania.
What is the difference between price to plant corn per acre and similar species?
*Dendroarythra picta* differs from other Orthopterans, such as grasshoppers and crickets, primarily in its specialized diet (exclusively roots and stems), its unique subterranean vibration detection ability, and its 'dusting' behaviour. While other Orthopterans are generalist herbivores, *Dendroarythra picta* is highly adapted to a specific niche within the grassland ecosystem. Furthermore, its mottled camouflage pattern is significantly more complex and effective than that of many closely related species.
