Melanagromyza

Hendel, 1920

Species Guides

Melanagromyza is a of leaf-miner flies in the Agromyzidae, established by Hendel in 1920. The genus has distribution and contains numerous , many of which are significant agricultural pests. Several species, particularly Melanagromyza sojae (soybean stem fly) and Melanagromyza obtusa (pigeon pea fly), cause substantial economic damage to legume crops through larval mining of stems, roots, and petioles. The genus has been the focus of research, with multiple species identified as potential natural enemies.

Melanagromyza angelicae by (c) Mathew* Zappa, some rights reserved (CC BY), uploaded by Mathew* Zappa. Used under a CC-BY license.

Melanagromyza gentianivora by (c) Mathew* Zappa, some rights reserved (CC BY), uploaded by Mathew* Zappa. Used under a CC-BY license.

Melanagromyza by (c) Judy Gallagher, some rights reserved (CC BY). Used under a CC-BY license.

Pronunciation

How to pronounce Melanagromyza: /mɛˌlænoʊˌɡroʊˈmaɪzə/

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

Identification

-level identification within Melanagromyza requires examination of male genitalia and detailed morphological study. The can be distinguished from other Agromyzidae by features of the structure and wing venation, though specific diagnostic characters vary among species. flies are typically small with dark coloration, often showing metallic green or bronze reflections.

Images

Habitat

Agricultural and agroecosystem settings, particularly fields cultivated with leguminous plants. Larvae develop internally within plant tissues including stems, taproots, and petioles.

Distribution

. occur across multiple continents including Asia (India, China, Japan, Southeast Asia), Africa (Egypt, Libya, South Africa), Europe (Russia, Ukraine, Malta), North America (USA), Central America and Caribbean (Dominican Republic, Haiti, Puerto Rico), South America (Argentina, Brazil, Bolivia, Paraguay), and Oceania (Australia, Papua New Guinea, Pacific islands).

Diet

Larvae feed internally on plant tissues; specific feeding habits vary by . Melanagromyza sojae larvae mine soybean stems, taproots, and petioles. Melanagromyza obtusa larvae feed on pigeon pea, mung bean, and cowpea. Melanagromyza dolichostigma has been reported as a root miner in soybean.

Host Associations

Glycine max - soybean; primary for M. sojae and M. dolichostigma
Cajanus cajan - pigeon pea; primary for M. obtusa
Vigna radiata - mung bean; for M. obtusa
Vigna unguiculata - cowpea; for M. obtusa

Life Cycle

Complete with , larval, pupal, and stages. Larvae are internal feeders within plant stems, roots, or petioles. typically occurs within the plant tissue or in soil. Specific developmental durations and voltinism vary by and climatic region.

Behavior

Larvae exhibit stem-mining or root-mining , feeding internally within plant vascular tissues. are not known to cause direct damage. Some show simultaneous by multiple species.

Ecological Role

Agricultural pests of leguminous crops, causing yield reduction through larval mining damage. Serve as for (Hymenoptera: Pteromalidae, Eulophidae), contributing to local dynamics in agroecosystems.

Human Relevance

Significant economic impact as pests of major food and forage crops. Melanagromyza sojae (soybean stem fly) and M. obtusa (pigeon pea fly) are subject to management efforts including application and research. attacking these flies have been investigated as biocontrol agents, with some proposed for implementation in programs.

Similar Taxa

OphiomyiaAnother of Agromyzidae with stem-mining larvae; distinguished by structure and larval feeding patterns
AgromyzaRelated in Agromyzidae with leaf-mining rather than stem-mining larvae; differs in larval and

More Details

Notable species

Melanagromyza sojae Zehntner, 1900 (soybean stem fly) is a major pest of soybean across multiple continents. Melanagromyza obtusa (Malloch) (pigeon pea fly) causes severe damage to pigeon pea crops in tropical regions, with reported losses up to 76% in some localities. Melanagromyza dolichostigma is recognized as a soybean root miner.

Biological control research

Multiple have been documented attacking Melanagromyza species, including Pediobius cajanus (Eulophidae) on M. obtusa in the Dominican Republic, and Syntomopus parisii and Leptomeraporus sp. (Pteromalidae) on M. sojae in Brazil. These natural enemies have been proposed as biocontrol agents due to their higher rates compared to previously known enemies.