What constellations does the ladybug have _ What stars does the ladybug have?

Which ladybugs are beneficial insects, which ladybugs are pests, and the characteristics of ladybugs

Ladybugs such as red ladybug, red ladybug, two-star ladybug, four-star ladybug, six-star ladybug, seven-star ladybug, twelve-star ladybug and thirteen-star ladybug belong to beneficial insects, while ladybug such as twenty-eight-star ladybug and eleven-star ladybug belong to pests. Usually, ladybugs with smooth, delicate and shiny wings are mostly beneficial insects, while ladybugs with fine fluff on hard wings are mostly pests.

First, which ladybugs are beneficial insects and which ladybugs are pests.

Ladybugs belonging to beneficial insects include two-star ladybugs, four-star ladybugs, six-star ladybugs, seven-star ladybugs, twelve-star ladybugs, thirteen-star ladybugs, red-star ladybugs, etc. Ladybugs belonging to pests include twenty-eight-star ladybugs and eleven-star ladybugs, etc. Generally speaking, ladybugs with smooth, delicate and shiny wings are mostly beneficial insects; The hard wings of ladybugs are covered with fine hairs. Most of these ladybugs are pests.

1, beneficial insect

(1) Ladybugs are widely distributed in aphids of wheat fields, flax trees and fruit trees, and adults and larvae mainly prey on aphids.

(2) Four-star ladybug is herbivorous for several hours and preys most of the time. It is the natural enemy of pests and mainly feeds on aphids.

(3) The adults and larvae of Coccinella septempunctata are carnivorous, mainly feeding on various aphids and psyllids.

(4) Ladybug septempunctata mainly feeds on aphids. According to statistics, a ladybug adult eats 100- 120 cotton aphids, 147 vegetable aphids and 59 apricot aphids a day.

(5) Twelve ladybugs live in the grass and mainly feed on aphids.

(6) Ladybugs mainly prey on cotton aphids, locust aphids, soybean aphids, wheat aphids, wheat aphids, millet aphids and other pests.

(7) The adults and larvae of ladybug are carnivorous and feed on aphids.

(8) Ladybug mainly feeds on scale insects, and each adult can eat 2. 1 egg per hour on average, and the larval food intake is 1.3. Each 3rd instar larva eats/kloc-0 per larva per hour, and 4th instar larva eats 2.6 larvae.

2. Pests

(1) Ladybugs mainly harm eggplant, potato, tomato, sweet pepper and other solanaceae vegetables.

(2) Schizophrenia Bordeaux solution mainly feeds on the leaves of cucurbitaceae plants.

(3) Ladybug eleven mainly harms solanaceae plants.

Second, the characteristics of ladybugs

1, it can be seen that 1 web has a back baseline behind the base nest.

2. The end of the mandible is axe-shaped, and both sides expand to the end, or both sides are parallel to each other. If both sides become narrower towards the end, the front end becomes thinner and shorter (the end of the lower jaw of ladybug subfamily is conical, oblong-conical, elliptical or cylindrical, and becomes narrower towards the end).

3. The attachment section is four hidden sections, the second section is wide, the third section is particularly small, and the fourth section is particularly slender. The third section and the fourth section are connected into a whole, slender and called claw attachment section, which protrudes from the depression or division of the second section.