Oriental Fruit Fly

Bactrocera dorsalis, Oriental Fruit Fly

The oriental fruit fly, Bactrocera dorsalis, is a serious pest of mangoes and other tropical fruits such as papaya. 

Originating in the Asiatic region, the oriental fruit fly is now found in approximately 65 countries, including parts of America and Oceania, and most of sub-Saharan Africa.

Russell IPM manufacture and supply pheromone lures, traps and complete monitoring systems for Bactrocera dorsalis, the Oriental fruit fly. Accurate monitoring is essential to minimise damage and protect crops. Therefore, installation of pheromone traps will alert to the presence of unwanted pests at an early stage, detecting the insects before they become a major problem and enabling timely and effective treatment.

The fruit fly is a very destructive pest that is well established in Asia: Bangladesh, Bhutan, Cambodia, China, India, Indonesia, Japan, Laos, Malaysia, Myanmar, Nepal, Ogasawara Islands, Pakistan, Philippines, Sri Lanka, Taiwan, Thailand and also Vietnam. B. dorsalis can be found in the United States, particularly Hawaii, California and Florida where reocurring infestations are common) Bactrocera dorsalis can fly 50-100km and has up to 10 generations of offspring per year.

Russell IPM offer Zonatrac against this pest – an innovative system that utilises an attract and kill technique against the males of the Bactrocera species.

Related Products

OVERVIEW

Development of Bactrocera dorsalis from egg to adult requires about 16 days in warm temperate conditions. The mature larva emerges from the fruit, drops to the ground and forms a tan to dark brown puparium. Pupation occurs in the soil. About nine days are required for attainment of sexual maturity after the adult fly emerges.

The developmental periods of the oriental fruit fly may be extended considerably by cooler temperatures. Under optimum conditions, a female can lay more than 3,000 eggs during her lifetime, but under field conditions it is more common to observe appriximately 1,200 to 1,500 eggs per female. Ripe fruit are preferred for viposition, but immature ones may be attacked also.

Management

Zonatrac

Zonatrac is an innovative lure and kill system for the management of several fruit fly species including Bactrocera dorsalis. The pheromone and toxicant system is available in separate male and female formulations to increase the likelihood of successful separation of the sexes. Through reduced opportunity for reproduction combined with mortality upon contact, the fruit fly population is suppressed and infestations are prevented.

Read more here: Zonatrac

Monitoring

Application Guidelines

The following notes are guidelines of general nature and meant to give the user a head start in implementing pheromone monitoring programme. Local conditions and practices can vary and can lead to customisation of the programme.

Recent Literature

Korsch, M. N. (2013) Piecing together an integrative taxonomic puzzle: microsatellite, wing shape and aedeagus length analyses of Bactrocera dorsalis. Royal Entomological Society.

Bactrocera dorsalis (Hendel) and B. papayae represent a closely related sibling species pair for which the biological species limits are unclear; i.e. it is uncertain if they are truely two biological species, or one biological species which has been incorrectly split taxonomically. The geographical ranges of the two taxa are thought to abut or overlap on or around the Isthmus of Kra, a recognised biogeographic barrier located on the narrowest portion of the Thai Peninsula. Morphological datasets showed consistent, clinal variation along the transect, without disjunction. Within and across the area of range overlap or abutment between the two species, only continuous morphological and genetic variation was recorded. Recognition that morphological traits previously used to separate these taxa are continuous, and that there is no genetic evidence for population segregation in the region of suspected species overlap, is consistent with a growing body of literature that reports no evidence of biological differentiation between these taxa.

Read more

Aketarawong, N et al., (2014) Bactrocera dorsalis s.s. in East Asia: disentangling the different forces promoting the invasion and shaping the genetic make-up of populations. Springer 2014.

The Oriental fruit fly, Bactrocera dorsalis, is one of the most economically destructive pests of fruits and vegetables especially in East Asia. Based on its phytophagous life style, this species dispersed with the diffusion and implementation of agriculture, while globalization allowed it to establish adventive populations in different tropical and subtropical areas of the world. The data suggests that the considered samples probably represent well established populations in terms of genetic variability and population structuring. The human influence on the genetic shape of populations and diffusion is evident, but factors such as breeding/habitat size and life history traits of the species may have determined the post introduction phases and expansion. In East Asia the origin of diffusion can most probably be allocated in the oriental coastal provinces of China, from where this fruit fly spread into Southeast Asia. The spread of this species deserves attention for the development and implementation of risk assessment and control measures.

Read more