-
Morphological Characteristics and Control Techniques of the Rice Root Leaf Beetle
The rice root leaf beetle, also known as the rice root golden flower beetle, belongs to the order Coleoptera, family Chrysomelidae. The adult is about 6 mm long; the dorsal surface of the body and the antennae are greenish brown with a metallic sheen, and the ventral surface bears dense, thick silvery hairs. The lower half of the femur of each leg is swollen, and the femur of the hind leg has a tooth-like spine near its apex. The elytra bear several parallel longitudinal grooves made up of punctures. Eggs are laid in masses and covered with a white, transparent gelatinous substance. The eggs are long oval, slightly flattened, about 0.8 mm long, initially milky white and later turning pale yellow. The larva is about 9 mm long, spindle-shaped, white and slightly curved, with 3 pairs of thoracic legs
-
What are the control methods for tortoise beetle
Water spinach, sweet potato leaves and others are the main vegetable varieties for bridging the summer slack season. Recently, many vegetable growers have reported that a small beetle is occurring in large numbers on these two vegetables, biting the leaves and causing notches and holes, leading to disastrous damage. Investigation found that this insect belongs to the tortoise beetle group, specifically the sweet potato small tortoise beetle or the sweet potato brown tortoise beetle. The sweet potato small tortoise beetle and the sweet potato brown tortoise beetle are very similar in morphology. The adult is about 5 mm long, hemispherical in shape (often mistaken by farmers for a ladybug), and mostly yellow-green to blue-green in body color with a metallic sheen. The pronotum and the margins of the two elytra extend
-
Rearing Methods and Technical Key Points for Ground Beetles (Eupolyphaga)
(1) Rearing equipment can be designed according to the scale and purpose of rearing. Here we only introduce the rearing equipment used to provide a source of medicinal insects. ① Insect sieves: their purpose is to separate nymphs of different instars, adults and oothecae by sieving within a certain period, and then rear them separately and isolate the medicinal insect bodies. The sieve apertures are divided into 5 specifications: 2-mesh sieve: used when separating out adults. 4-mesh sieve: used when separating out 7th-8th instar nymphs. 6-mesh sieve: used when separating out oothecae and insect feces. 12-mesh sieve: used when separating out 1st-2nd instar nymphs. 17-mesh sieve
-
The Harm and Control Methods of the Spruce Bark Beetle
The spruce bark beetle (Ips typographus Linnaeus) belongs to the order Coleoptera, family Scolytidae. In China it is distributed in Northeast China, Inner Mongolia, Sichuan, ** and other places, mainly damaging spruce and Korean pine, and is a destructive pest in some spruce forest areas. Damage characteristics: it bores galleries between the phloem and sapwood of pine trees, and the galleries are compound longitudinal galleries. It can also directly attack healthy trees, and often occurs together with other bark beetles, causing trees to die in patches. Morphological characteristics: adult body length 4.0-5.5 mm,
-
Identification and Control Methods of the Spruce Sawyer Beetle
The spruce sawyer beetle (Monochamus urussovi Fisher), also known as the spruce black longhorn beetle, belongs to the order Coleoptera, family Cerambycidae. In China it is distributed in the Northeast, Inner Mongolia, Hebei, Shandong, Jiangsu, Shaanxi and other places. It mainly damages Picea koraiensis (Korean spruce), Picea jezoensis (Jezo spruce), Abies nephrolepis (Khingan fir) and others, and is a major pest of coniferous timber in northern China. Damage characteristics: the larvae damage felled trees, weakened standing trees, wind-thrown trees and logs in timber yards, forming thick galleries; the adults gnaw the tender bark of small branches of living trees. Morphological characteristics: adult body length 21-33
-
Identification and Control Methods for the Great Spruce Bark Beetle
The great spruce bark beetle [Dendroctonus micans (Kugelann)] belongs to the order Coleoptera, family Scolytidae. It is mainly distributed in Austria, Belgium, Czech Republic, Slovakia, Denmark, Finland, France and other countries. In China, it has been found in the Makehe forest area of Qinghai Province. It mainly damages some species of Picea (spruce), and occasionally some species of Pinus (pine) and Abies (fir), as well as European larch and Douglas fir. Damage characteristics: adults and larvae attack weakened trees and dead standing trees; during outbreaks, they can attack healthy trees, severely disrupting the trees' transport function,
-
Identification and Control Methods of the Spruce Root Bark Beetle
The spruce root bark beetle (Hylastes cunicularius Erichson) belongs to the order Coleoptera, family Scolytidae. In China it is distributed in ** and Sichuan, mainly damaging spruce, and is especially severe on artificially regenerated seedlings. Damage characteristics: it feeds on the roots of spruce seedlings and attacks freshly cut stumps. Morphological characteristics: adult body length about 4.5mm, dark brown, slightly glossy, with sparse bristles. The frons is narrow and long, covered with flat, shallow, dense punctures each bearing 1 hair; the lower half of the frons is low and flat, the upper half protrudes
-
A Detailed Guide to the Harm Caused by the Jujube Leaf Beetle and Its Control Methods
The jujube leaf beetle belongs to the order Coleoptera, family Chrysomelidae. The larvae and adults of this insect damage jujube leaves and tender shoots. In outbreak years, the leaves are eaten bare, leaving only the bare fruiting branchlets, which greatly affects yield. The peak damage period for this insect is from mid-April to mid-May. Both larvae and adults damage jujube leaves, tender shoots, flower buds and flowers. Control methods: spraying mainly for flower protection is the primary approach. During the occurrence period of larvae and adults, spray 90% trichlorfon at 1500 times dilution or deltamethrin at 1.5 ten-thousand to 1.6 ten-thousand times dilution; generally the insecticidal effect is very good.
-
A Detailed Guide to Identifying and Controlling the 28-Spotted Ladybird Beetle on Eggplant
The 28-spotted ladybird beetle on eggplant belongs to the order Coleoptera, family Coccinellidae, also known as the groundcherry ladybird beetle, commonly called "flowered big sister." Its host crops include solanaceous vegetables such as eggplant, tomato, green pepper and potato, as well as cucurbitaceous vegetables such as cucumber. In addition, it can also damage crops such as beans, groundcherry and Chinese cabbage, among which eggplant suffers the most serious damage. It is distributed throughout the country, but occurs in larger numbers and causes serious damage in areas south of the Yangtze River basin. 1 Field identification 1.1 Damage characteristics It damages crops as adults and larvae. Newly hatched larvae
-
Occurrence Patterns and Control Methods of the Pear Buprestid Beetle
The pear buprestid beetle begins eclosing in late April, and in early to mid-May the adults chew an oval-round hole to emerge. After emerging, the adults feed on leaves during the day, rest quietly on the leaves in the morning and evening, and when startled have the habit of dropping to the ground and feigning death. About 10 days after emergence and activity, the adults begin to lay eggs; before laying, they crawl along the trunk and insert their ovipositors into rough, raised cracks in the bark to lay eggs, mostly at the fork junctions of branches and trunks that are 2 years old or older, laying 2-3 eggs per site, with each female able to lay 20-40 eggs. Mid to late May is the peak egg-laying period, and early June is the peak hatching period. After hatching, the larvae first bore into the cortex
条件筛选