How to prevent and control the white clover aphid
Plant management knowledge series, about the knowledge of the white clover aspect in the flower clinic, how to prevent and control the white clover aphid, next [] the editor will introduce.
Aphids belong to the Homoptera: Aphididae, also known as腻虫 (nìchóng). They are also called honey insects due to their secretion of large amounts of honeydew.
Harmful characteristics
Aphids absorb the sap from the leaves and stems of white clover, often causing the leaves to fade, curl up, and affect the development of white clover. In severe cases, it leads to growth stagnation, eventual yellowing, and even death. Moreover, aphids are important vectors for white clover viral diseases and other diseases.
Occurrence patterns
Aphids have several generations per year, alternating between generations. In the summer, they reproduce a generation every 4 to 5 days, and each female aphid can produce 60 to 70 nymphs in her lifetime. They overwinter as eggs, hatch in March to April of the following year, and the thelytokous (virgin birth) females reproduce 3 to 4 generations on overwintering plants. In April to May, winged thelytokous females are produced, which fly to the summer hosts to cause harm and continue thelytokous reproduction. In late autumn, winged migratory aphids move from the summer hosts to the overwintering plants, where they produce wingless sexual females and males that have migrated from elsewhere, mate, and lay eggs to overwinter.
Control methods
Cemicical control can involve spraying 50% phoxim emulsion 800 to 1000 times dilution or 2.5% dichlorvos 2500 to 3000 times dilution for foliar spraying. When spraying, pay attention to safety. Oxamyl is also a good medicine for controlling aphids, but it may cause phytotoxicity to peach, Prunus triloba, and crabapple plants, so it should be used with extra caution in ornamental plants and preferably not used.
Non-harmful control involves spraying 1.2% matrine·nicotine emulsion 800 to 1000 times dilution, or 6% imidacloprid emulsion 3000 to 4000 times dilution, or 5% acetamiprid emulsion 5000 to 6000 times dilution.
Yellow thin plastic boards can be used to attract and kill winged aphids.
Pay attention to protect and utilize various natural enemies. Do not use broad-spectrum pesticides during the peak hatching period of natural enemies.
The above is the complete introduction on how to prevent and control the white clover aphid, for everyone to learn and understand!