Control of巴西 Tie蔗扁蛾
This article brings you the planting content of巴西 Tie in the Flower Clinic, the control of巴西 Tie蔗扁蛾. Next, the editor will introduce.
巴西 Tie蔗扁蛾 is a worldwide quarantined Lepidopteran pest. It occurs in various southern provinces and regions, and in recent years it has rapidly spread to the north. According to investigations, besides harming巴西 Tie (wood), the蔗扁蛾 also harms more than 50 kinds of flowers and economic crops such as发财树, poinsettia, cycads, mini coconut, Hainan Tie, dragon blood tree, and bamboo palm. The蔗扁蛾 is a boring pest, which cannot be killed by general pesticides, making it difficult to control, thus allowing this pest to spread rapidly and becoming one of the main devastating pests in flower production. The larvae of the蔗扁蛾 bore into the epidermis of巴西 Tie, destroying the entire conductive tissue, leaving only a thin layer of epidermis and xylem, which can easily separate from the bark, making it difficult to detect the damage, severely hindering the normal growth and development of the plant, leading to withered plants, no germination, and even the death of the entire plant.
Morphological characteristics
Adults are yellow-brown, with dark brown forewings, each with a black spot in the middle cell and along the hind margin. The hind wings are yellow-brown, with long hair along the hind margin. The eggs are light yellow and round. Larvae are about 30 mm long, with a red-brown head and a row of rectangular spots on the back and sides. Pupae are brown.
Living habits
In areas such as Guangdong, there are about 5 to 6 generations per year, while in northern regions, there are 3 to 4 generations per year. Larvae overwinter in the potting soil of flowers in large greenhouses and温室. In the following year, when the temperature and humidity are suitable, the larvae crawl on flowers to cause harm, generally boring into the bark, sometimes into the epidermis of the wood, and a few bore into the pith from wounds, hollowing out the plant. Larvae have about 7 instars, with a larval period of over a month. Mature larvae are often found in the upper part of wooden stakes in summer and in the soil in autumn to pupate, with a pupal period of about 15 days. Adults have the habit of supplementing nutrition. Eggs are laid scattered or in clumps, with an egg stage of about 4 days. Newly hatched larvae spin silk downwards and immediately bore into the bark to cause harm, especially severely affecting巴西 Tie stakes over 3 years old.
Control methods
① Strengthen quarantine. It is necessary to recognize the harmfulness of this pest and strengthen the quarantine management of the exchange and transportation of flowers and trees, strictly prohibiting the expansion and spread of巴西 Tie stakes infested with pests, and promptly destroying infested stakes.
② Eliminate the source of pests. It is necessary to strengthen the potting soil replacement work of巴西 Tie in large greenhouses and温室, promptly spray to eliminate overwintering larvae and pupae found in the potting soil to prevent their reproduction and development.
③ Chemical control. Master the hatching period of each generation of pest eggs and spray 1 to 2 times during this period. You can use 20% Quinolphos emulsion 1500 times, or 50% Fenitrothion emulsion 1000 times to spray the stems. In summer, promptly spray to prevent pest damage. From autumn to the beginning of spring, use 20% Quinolphos emulsion 1500 times, 50% Phoxim emulsion 1000 times, 50% Fenitrothion emulsion 1000 times, 80% Dichlorvos emulsion 1000 times, 80% Trichlorfon 800 times, or 40% Omethoate emulsion 1000 times, spray once every 7 days, continuously spraying the stems 2 to 3 times, or use 75% Phoxim emulsion 1500 times, 40% Methyl isothiocyanate emulsion 1000 times to pour into the pot, or mix 50% Carbaryl powder 1:200 with soil and sprinkle it on the surface of the potting soil, applying once every 15 days, continuously for 2 to 3 times, which can kill overwintering larvae.
The above is a comprehensive introduction to the control of巴西 Tie蔗扁蛾, hoping to bring some knowledge about green plants to green plant enthusiasts.