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What are the control methods for the Oriental fruit fly (Bactrocera dorsalis)?
[Morphological characteristics] The adult is 6-8 mm long with a wingspan of 16 mm, and the whole body is alternately dark black and yellow. The thorax has a total of 11 pairs of bristles, mostly yellowish-brown, including 2 pairs of scapular bristles, 2 pairs of dorsocentral bristles, 1 pair of presutural bristles, 2 pairs of postsutural bristles, 1 pair of mesopleural bristles, 1 pair of pteropleural bristles, 1 pair of prescutellar bristles, and 1 pair of scutellar bristles. The abdomen is oval, with 4 segments in males and 5 segments in females. The ovipositor is well developed, but its length is less than half of the abdomen, and the narrow posterior portion is shorter than the fifth abdominal segment. The egg is spindle-shaped, slightly pointed at one end, slightly curved, about 1 mm long and about 0.1 mm wide, milky white. Larva: the first-instar larva is 1.2-1.3 mm long, the second instar is 2.5-5.8 mm, and the third instar is 7.0-11 mm. The first-instar larva is semi-transparent, the second and third instars are milky white, and the mature larva after the third instar is orange-yellow. The body is conical, small and pointed at the front end, the mouth hooks are black, and the button-shaped structure on the inner side of the spiracular plate is relatively large and obvious. The pupa is oval, about 5 mm long and about 2.5 mm wide, light yellow.
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Key Technical Points for Fry Rearing in Yellow Catfish Aquaculture
Rearing yellow catfish fry (commonly known as "water flowers") with a body length of 1.5-1.2 cm to fry of 5-6 cm in size (known as "fire-flake fingerlings") takes about half a month. The rearing methods at this stage include pond rearing, flowing-water tank rearing and net-cage rearing. Compared with fingerling rearing
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How Big Can the Striped Small Barb Grow? An Analysis of Adult Fish Body Length
The striped small barb is a kind of fish, also known as seven-star fish and red-eye ring, distributed in ditches or small streams among the plains of southern China and Taiwan, China, and is a common freshwater fish. Nowadays many people have also begun to farm striped small barbs, so how big can the striped small barb grow? 1. Striped small barb
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How Big Can Climbing Perch Grow? Maximum Weight and Body Length Explained
The turtle-shell climbing perch (Anabas testudineus) is a small fish of the family Anabantidae. It is perennial, lives in groups or alone, is diurnal, and is an omnivorous, partly carnivorous native freshwater fish. So, how big can climbing perch grow? 1. How big can climbing perch grow? Farmed climbing perch can reach a body length of more than 25 cm. From small fry to 15 cm, growth is rapid and takes only a few months; after 15 cm, growth begins to slow down, and growth rates differ between the sexes.
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How Big Can an Eel Grow? A Full Analysis of Its Size Limits
A wild eel is about 60-90 cm long and weighs about one kilogram, with a maximum length of up to 130 cm and a weight of about five kilograms. However, the Japanese white eel we usually eat is mostly farmed adult eel, usually about 40-50 cm long and weighing about 150-500 grams, that is
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How Do White-eyes Get Through Winter? Winter Care Methods and Precautions
The white-eye is a small insectivorous bird with a body length of 90-122 mm. Its body shape and color closely resemble those of the leaf warbler, and its eye ring is made up of conspicuous short white downy feathers, forming a striking white eye ring. So, how do white-eyes get through winter? 1. How do white-eyes get through winter? The white-eye is a summer
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How Big Can a Pig-Nosed Turtle Grow? A Detailed Look at Adult Body Length and Weight
The pig-nosed turtle is a type of turtle and also a relatively popular pet, so let's find out how big a pig-nosed turtle can grow. The carapace length of an adult pig-nosed turtle generally reaches 46-51cm, with a body weight generally between 18-22Kg. The largest pig-nosed turtle discovered so far had a carapace
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How Big Can Arowanas Grow? A Detailed Explanation of Adult Fish Body Length
The arowana is a large ornamental fish with a golden body all over, flat and long, and very popular among fish keepers. Some specifically buy several to keep at home, so how big can an arowana grow? 1. How big can an arowana grow? An adult arowana can grow to about 40-50 cm, and its lifespan can reach several decades.
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How Big Can a Chinese Pond Turtle Grow? An Introduction to the Body Length and Weight of Adult Chinese Pond Turtles
Under artificial rearing conditions, Chinese pond turtles generally live 20-30 years, and a few can live as long as 50 years. The Chinese pond turtle is also known as the golden-thread turtle, longevity turtle, and mountain turtle, and is currently mainly distributed in China, South Korea, and Japan. Common diseases of the Chinese pond turtle: 1. White eye disease: the turtle's eyes
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How Big Can Koi Grow? A Detailed Explanation of Adult Koi Body Length
Koi can grow to 1-1.5 m. If kept in a small fish tank, due to the limited space for activity, they can only grow to two or three cun; if you want them to grow big, they should be kept in a large fish tank or an outdoor pond, and they will quickly grow to 30 cm or larger. Koi
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