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Once laid, eggs usually take about 5–10 days to hatch, 10–13 days to develop into adults, and about 2 days to become gravid. All of this equates to a 20-25 day life cycle from egg to gravid adult. [8] The nematode completes its life cycle in about 21 days at 25 °C. [9] Females and juveniles feed inside roots, especially near the tips.
The life cycle of the female citrus nematode is 6–8 weeks long, whereas the male citrus nematode only lives for about 7–10 days. These nematodes reproduce by amphimixis and parthenogenesis. The first-stage juvenile (J1) undergo one molt while still in the egg.
The life cycle of a typical trematode begins with an egg. Some trematode eggs hatch directly in the environment (water), while others are eaten and hatched within a host, typically a mollusc. The hatchling is called a miracidium, a free-swimming, ciliated larva. Miracidia will then grow and develop within the intermediate host into a sac-like ...
The egg then hatches, and second stage larvae emerge into the sea enclosed in a protective sheath. [4] Anisakis simplex lodged in the liver of a cod fish. The temperature of the water affects the speed of hatching of the eggs. In warmer temperatures, eggs take between 4 and 8 days to hatch, but in temperatures below 5 °C, it may take up to 82 ...
Females acquire a globose shaped body while males become vermiform and leave the roots. Upon maturity females lay eggs into a gelatinous mass that protect them against unfavorable environmental conditions, and the life cycle is repeated. It takes 37 days at 21 °C (70 °F) for M. incognita to complete its life cycle. [7] [10] [11]
The length of the life cycle is temperature-dependent. [ 16 ] [ 17 ] The relationship between rate of development and temperature is linear over much of the root-knot nematode life cycle, though it is possible the component stages of the life cycle, e.g. egg development, host root invasion or growth, have slightly different optima.
Soybean cyst nematodes are so devastating because of their life cycle being so efficient for multiplication. They have six life stages, which is the norm for all nematodes. These stages are egg, juvenile (J1-J4), and adult, and they can complete multiple cycles within a single growing season. [4]
Females lay eggs in the gelatinous matrix which hatch again and the cycle is repeated if environmental conditions are favorable. [12] The length of the life cycle depends on environmental factors mostly temperature and host status. It may take about 1 month to complete the life cycle. The nematodes also have a very high reproductive rate. [1]