Significance of fruit flies in vegetable crops. Vegetable crops hold a key position in agricultural production in Reunion (Indian Ocean); however, many pests and diseases threaten the profitability of this agricultural sector. Fruit flies (Diptera: Tephritidae) figure among the main pests for solanaceous crops and cucurbits (cucumber, zucchini, melon, etc.). Losses of as much as 80% of tomato and 100% of cucurbit crop harvests have been frequently observed. Inventory and distribution. Four fruit fly species belonging to the Tephritidae family cause major damage to vegetable crops in Reunion: Bactrocera cucurbitae (Coquillet), Dacus ciliatus Loew and D. demmerezi (Bezzi) on Cucurbitaceae, and Neoceratitis cyanescens (Bezzi) on Solanaceae (primarily the tomato). Distribution of each of them is presented. Biology and behavior. A few studies on the biology and behavior of the four fruit flies were conducted in Reunion in the late 1990s. Their main biological characteristics are summarized. Population control methods used in Reunion. Various methods such as chemical control, preventive measures (sanitation), physical control, biotechnical control [colored traps, the Male Annihilation Technique (MAT) and the Bait Application Technique (BAT)], and biological control currently used in Reunion against fruit flies are reported. Other control methods such as Integrated Pest Management and the Sterile Insect Technique are not used in Reunion. Prospects for implementing agro-ecological management of vegetable fruit flies in Reunion. This part presents research actions implemented in fly bio-ecology, research actions into the genetic structure of populations and design of an agro-ecological management scheme for vegetable fruit flies. Conclusions. The control methods used independently have not been successful to effectively control tephritid populations. A more integrated approach is required, also taking into account the landscape scale and its mosaic of habitats, especially wild plants, whose role must be considered within a framework of agro-ecological management of these pest populations.

Introduction. Higher allocation of land in favour of fruits is vital to raise the farm income and productivity, but such an opportunity is also complemented with higher risk and uncertainty. Economic expectation assumes a great role, while such decisions have an impact on the welfare of farmers in terms of their income and risk. In this paper, we examined the nature of price expectations, their relationship with other economic factors, and analysed the importance of price and income expectations of the fruit (apple) growers on their land allocation decisions. Materials and methods. In this paper, the elicitation technique was used to obtain both price and income expectations of apple growers. The price expectations were compared with the actual price of apple over the last three years and then linked with farmers' input-use propensities. A regression method was used to identify the role of expectations in the decision of land allocation in favour of apple crops. Results and conclusion. Our results showed that better price expectation improves the input-use (generally labour) propensities. However, for allocation of the inelastic factor of production, i.e., land, in favour of a fruit crop, it is the income expectations that explain farmers’ decisions. Farmers’ capacity to generate higher productivity along with the better market prospects together explain their decision regarding allocating land to high value fruit crops.