A complete book of pests that harm flowers
Now whether it is a city street or a small village yard, people want to plant and write flowers to decorate, and then accompanied by a lot of garden gardening planting bases and production, but flowers are not easy to plant, frequent pests and diseases, to put forward specific control measures, it is necessary to understand the types of flower pests to grasp its occurrence law, the following is based on insect classification to briefly describe the main pests on flowers:
【Orthoptera】
Body to large, mouthpiece chewing, lower mouth type. The forepout is large with 2 pairs of wings. The forewings are slightly stiffer called the overwing, and the hindwings are membranous, broad, folded into a fan when stationary, and hidden under the overwing. 10 segments of the abdomen. Female worms have developed ovipositors. For example, cotton locusts harm Fusang, jasmine, etc., and slugs eat begonias, peaches, pomegranates and so on in the soil.
【Hemiptera】
The head is generally a triangular or five-pointed star, and the mouthparts are sucked. The thorax is protruding from the dorsal plate of the thorax and the small shield of the mid-chest, and is large, and the small shield is generally triangular. The thorax is generally hexagonal. The anterior margin of the posterior thoracic lateral plate is often preceded by a pair of odorous glandular foramens near the basal segment of the midfoot, two pairs of wings, the front half of the forewing wing base is leathery, the posterior half is membranous, and the wings are flattened on the back of the abdomen when stationary.
【Homoptera】
The mouthparts are sucked and grown at the back of the head. The forebreast is small, the middle chest is the largest, and is divided into anterior shield, shield, small shield and shield. Life history is complex, including amphoteric reproduction and parthenogenesis. Adults and nymphs both suck on plant branches and leaves, and some are extremely heavy, such as aphids and blowing aphids.
【Coleoptera】
It is the most diverse species in the insect class, commonly known as beetles. The head is highly hardened, the mouthparts are chewy, the upper jaw is hard, and the lower jaw is developed. The forebrahorax is distinctly separated from the rest of the body, and the middle and posterior chest and abdomen heal closely. The dorsal plate of the middle thorax is covered by elytra, but the small shield is exposed and triangular.
【Taemonae】
Small and slender. The head is rectangular and the mouthparts are sucked. The dorsal plate of the thorax is well developed and rectangular, with a mane on the anteroposterior and anterior margins and anterior horns. The feet are similar, with large forefoots, 1 to 2 tarsal segments, and retractable bubbles at the ends.
【Lepidoptera】
It is divided into two categories: moths and butterflies. Small to large. Adult wings , bodies , and appendages are covered with scales , and the mouthparts are siphoned or degenerate. Larval flies, mouthparts chewing, the body segments are densely scattered bristles or hairs, hair clusters, branches, etc., there are 2 to 5 pairs of gastropods, mostly 5 pairs, with toe hooks, can spit silk cocoons or knotted nets. Pupae are pupated. Eggs are mostly round, hemispherical or oblate. Such pests are mainly infested in the larval stage.
【Diptera】
The structure of the body is relatively special, generally with a pair of membranous forewings, the hindwings become an average rod, and the mouthparts suck and suck type. There are two types of flies and mosquitoes. Chrysanthemums are infested with chrysanthemum leaves, and pea leafminer larvae feed on the leaves of sweet pea and melon leaf chrysanthemum.
【Hymenoptera】
Most adults narrow the abdomen at the junction with the thoracic ventral segment to form a ventral stalk. Ovipositors often develop functions such as sawing and filing.
【Tick mites】
The body is commonly known as the red spider and is not an insect class. Throughout life, it goes through four stages: egg, young mite, nymph and adult mite. In addition to the eggs, the other 3 stages of mites are concentrated on a variety of flower leaves to suck juice as a pest.