Tephritid fruit flies are of major economic importance in agriculture. Some have negative effects, some positive. Various species of fruit flies cause damage to fruit and other plant crops. The genus "Bactrocera" is of worldwide notoriety for its destructive impact on agriculture. The olive fruit fly ("B. oleae"), for example, feeds on only one plant: the wild or commercially cultivated olive, "Olea europaea". It has the capacity to ruin 100% of an olive crop by damaging the fruit. "Bactrocera dorsalis" is another highly invasive pest species that damages tropical fruit, vegetable, and nut crops." Euleia heraclei" is a pest of celery and parsnips. The genus "Anastrepha" includes several important pests, notably "A. grandis", "A. ludens" (Mexican fruit fly), "A. obliqua", and "A. suspensa". Other pests are "Strauzia longipennis", a pest of sunflowers and "Rhagoletis mendax", a pest of blueberries. Another notorious agricultural pest is the Mediterranean fruit fly or Medfly, "Ceratitis capitata", which is responsible for millions of dollars' worth in expenses by countries for control and eradication efforts, in addition to costs of damage to fruit crops. Similarly, the Queensland fruit fly ("Bactrocera tyroni") is responsible for more than $28.5 million in damage to Australian fruit crops a year. This species lays eggs in a wide variety of unripe fruit hosts, causing them to rot prior to ripening.