Effects of sex ratio on adult fecundity, longevity and egg hatchability of Bradysia difformis Frey at different temperatures
Effects of sex ratio on adult fecundity, longevity and egg hatchability of Bradysia difformis Frey at different temperatures
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DOI：
10.1371/journal.pone.0217867
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发表时间：
2019-06-05
期刊：
影响因子：
3.7
通讯作者：
Liu, Changzhong
中科院分区：
文献类型：
--
作者：
Gou, Yuping;Wang, Guang;Liu, Changzhong
异形迟眼蕈蚊不仅危害食药用真菌，而且对韭菜、绿色葱、大蒜等蔬菜作物也造成危害。研究温度和性比对B成虫繁殖力、寿命和卵孵化率的影响。在10 ℃、15 ℃、20 ℃、25 ℃和30 ℃温度下，测定了雌雄比为1：1、1：2、1：3、2：1和3：1时的成虫存活寿命、产卵量和卵孵化率。雌性生殖力和卵孵化率随温度升高而增加，在25 ℃时达到峰值，但这对成虫寿命不利。雌、雄比分别为1：1、1：2和1：3时，雌、雄比均较适宜，其中以1：1的性比最适宜其产卵行为。这些结果为预测B的种群密度提供了依据。并为通过人工控制和改变性比来有效防治害虫提供了参考。
The fungus gnat Bradysia difformis Frey not only attacks edible and medicinal fungi, it also causes the damages to leek, green onion, garlic and other vegetable crops. To confirm the effects of temperature and sex ratio on adult fecundity, longevity and egg hatchability of B. difformis, we assayed the adults survival longevity and numbers of oviposition, as well as egg hatching rate under female-male ratios of 1:1, 1:2, 1:3, 2:1 and 3:1 at 10, 15, 20, 25 and 30 degrees C. Female fecundity and egg hatchability were increased with temperature and peaked at 25 degrees C, which, however, were adverse to adult longevity. Furthermore, female-male ratio of 1:1, 1:2 and 1:3 seemed suitable for female fecundity, of which the sex ratio of 1:1 was the most suitable ratio for its oviposition behavior. These results provide an insight for predicting the population density of B. difformis and offer a literature reference in the effective treatment of harmful insects by controlling and changing the sex ratio artificially.