Liriomyza sativae

Blanchard, 1938

vegetable leaf miner, vegetable leafminer

Liriomyza sativae, the , is a leaf-mining in the . to the Neotropics, it has become a widespread pest of vegetable globally. feed internally on leaf mesophyll, creating characteristic serpentine mines that reduce photosynthetic capacity. The is notable for its broad range spanning multiple families, rapid time, and competitive interactions with mediated by temperature.

Starr-110626-6317-Senecio madagascariensis-leaf mining Liriomyza sativae fly-Olinda-Maui (25004068371) by Forest and Kim Starr. Used under a CC BY 3.0 us license.

Starr-110626-6321-Senecio madagascariensis-leaf mining Liriomyza sativae fly-Olinda-Maui (24470503543) by Forest and Kim Starr. Used under a CC BY 3.0 us license.

Starr-110626-6315-Senecio madagascariensis-leaf mining Liriomyza sativae fly pupa-Olinda-Maui (24979186602) by Forest and Kim Starr. Used under a CC BY 3.0 us license.

Pronunciation

How to pronounce Liriomyza sativae: /ˌlɪri.oʊˈmaɪzə səˈtaɪvi/

These audio files are automatically generated. While they are not always 100% accurate, they are a good starting point.

Identification

The , , third antennal , and combined with black and with yellow-edged plates distinguish from . The unique is particularly useful for separating L. sativae from L. trifolii. create serpentine leaf mines that widen as the larva grows. are found in soil, not in leaf mines.

Images

Appearance

are small , up to 1.7 mm in length, with females larger than males. The , , third antennal , and are ; the and are black with yellow edges on some abdominal plates. The is distinctive and useful for distinguishing from close relatives. Legs are with yellow and . are approximately 0.25 × 0.12 mm, translucent and whitish. are legless, headless , translucent when young, becoming yellowish-orange in later . are oval, slightly flattened, yellowish-orange to golden brown when adults are near .

Habitat

Found in agricultural areas, vegetable fields, and glasshouses. In its range, occurs from lowland to mid-elevation areas, typically below 1,200 m in tropical regions. In temperate regions, persists in protected environments (glasshouses) during cold periods. Associated with disturbed and cultivated landscapes.

Distribution

to South America (Argentina, Brazil, Chile, Colombia, French Guiana, Peru, Venezuela). and established in North America (southern USA, Mexico, Hawaii), Central America and Caribbean, Europe (UK, Finland), Asia (China, India, Indonesia, Iran, Israel, Japan, Jordan, Malaysia, Oman, Sri Lanka, Thailand, Turkey, Uzbekistan, Vietnam, Yemen), Africa (Cameroon, Nigeria, Sudan, Zimbabwe), and Oceania ( Samoa, Cook Islands, Federated States of Micronesia, French Polynesia, Guam, New Caledonia, Northern Mariana Islands, Samoa, Vanuatu). In the USA, occurs primarily in southern states; northern are transient, transported in material but unable to survive cold winters except in glasshouses.

Seasonality

Multiple per year under favorable conditions. At 25–30°C, larval stage lasts approximately 8 days, pupal stage similar; at 15°C, complete cycle extends to 25 days. Activity year-round in tropical and subtropical regions; in temperate zones, active during warm months with in protected environments.

Diet

are internal , feeding on mesophyll tissue between upper and lower leaf surfaces. feed on sap from feeding punctures and possibly nectar.

Host Associations

Phaseolus - beans
Solanum lycopersicum - tomato
Solanum melongena - eggplant
Capsicum - pepper
Cucurbita - squash
Citrullus lanatus - watermelon
Apium graveolens - celery, less preferred
Solanum americanum - wild
Bidens alba - wild

Life Cycle

Females lay inside leaf tissue, creating small puncture holes. develop through three , feeding internally and creating serpentine mines that widen as larvae grow. Third instar larvae cut a slit in the upper leaf surface and drop to the ground to pupate in soil. from follows. time is temperature-dependent: approximately 16 days at 25–30°C, 25 days at 15°C. Females may lay several hundred eggs over a lifespan of about one month.

Behavior

females use feeding punctures for both nutrition and site preparation. exhibit endophytic feeding , tunneling between leaf surfaces. occurs in soil, not in leaf mines. The shows rapid cold hardening capacity in pupal stage; RCH effect lasts approximately 4 hours. Adults do not exhibit rapid cold hardening. Competitive interactions with L. huidobrensis are temperature-mediated, with L. sativae excluded from high-altitude by temperature and from lowland habitats by competition with L. huidobrensis where temperatures overlap.

Ecological Role

and agricultural pest. Larval leaf mining reduces photosynthetic capacity of plants. Serves as host for multiple including (e.g., Phaedrotoma scabriventris), figitids (e.g., Zaeucoila unicarinata), and eulophids (e.g., Diglyphus isaea). influenced by , though chemical use can disrupt .

Human Relevance

Major agricultural pest of vegetable worldwide. Causes through reduced yield and quality of leafy vegetables, beans, , and solanaceous crops. Management relies on including , , and selective . Has developed to multiple insecticide . Subject to regulations in many countries.

Similar Taxa

Liriomyza trifoliiSimilar leaf-mining habit and range; distinguished by coloration and pupal characteristics. L. trifolii has better and rapid cold hardening capacity in adults, which L. sativae lacks.
Liriomyza huidobrensisOverlapping range and distribution; distinguished by temperature preferences. L. huidobrensis is restricted to cooler, high-altitude by upper thermal limit of 28–29°C, while L. sativae occupies warmer lowland areas. Where they co-occur, L. huidobrensis competitively excludes L. sativae from preferred hosts.