Fruit Fly Organic Control includes: The main fruit fly pests in Australia are Queensland fruit fly Q fly Queensland fruit fly develop from eggs to adults within five weeks in hot weather, whereas . Avocado, avoid thin-skinned Fuerte and Rincon. Fruit fly moms lay their eggs on everything, from just-starting-to-ripen fruit—like the kind you recently brought home from the market—to the. reduce pest population. Prune regularly to improve aeration. Bag fruits using old newspapers measuring 15x22 cm to prevent fruit flies from laying eggs on fruits.