In recent years, with the construction and development of garden cities, ecological cities, and rural urbanization, the cycads have become one of the indispensable varieties of greening and beautifying the environment. As the amount of cultivated cycads in the city increases year by year, the occurrence of the main pest of the cycads on the cycads has also been increasing year by year, and the phenomenon that the new leaves were all eaten at that time in individual gardens. The following describes the characteristics and prevention and control techniques of the occurrence of the Cypriniformis butterfly. Damage characteristics The Cypriniformis butterfly has completed a generation of about 20 days in the Beijing area, of which the egg period is 3 days, the larval period is 5-7 days, the flood period is 8 days, and the adult after the emergence lays eggs on the second day. The worms occur in the Beijing area from May to November, and the damage period is from mid-June to mid-October. The adults disperse the eggs on the curly new leaves of the cycad. The larvae first enter the curly new leaves and feed on the leaves. As the larvae grow and the leaves grow, they often cluster in the bud scales on the top of the cycads. On the more tender leaves on the food, when severe, the leaves will only eat petiole left, sometimes petiole hollowed out, in the peak period of damage can appear in 3 days -5 days of young leaves, wilting, dry or shrink all the leaflets on the roll, After the leaves are incomplete, they are incomplete and in the rain they cause the tip of the apex to rot, and the whole plant does not produce new leaves all year round, losing its ornamental value. The worms overlap in generations and are hidden before the damage. The larvae hatch into the buds to feed. When the new leaf is discovered and damaged, it has caused losses. Although one dose can kill a large number of larvae, it will occur in a large amount after one week due to killing of imago and eggs. Control methods 1. Agricultural measures. Before the cycad enters the shed, the debris in the pot is removed. Special attention must be paid to removing the mature larvae and overwintering lice of the roots and cycads, and eliminate the overwhelming insect sources. The base fertilizer should be applied before June 30th of that year, and it should be put on the shed before October 1st. The temperature of the shed should be maintained at about 15°C to promote the early germination of new shoots. It is necessary to grow new leaves before June 10 and miss the peak of damage. 2. Strengthen forecasting. From the beginning of June, observations were made every day. It was found that the gray Kocho appeared around the cycads and that they were promptly sprayed. The focus of the spraying was on the new leaves of the cycads during the budding period. 3. Chemical control. It can use 21% synergistic efficiency of 100-1500 times of cyanide, or 20% of 800-1000 times of chlorinated EC, 5% of S-fenvalerate 2500-3000 times, and 5% of cypermethrin EC 2000-3000. Double liquid spray. In the month of May, 15% iron granule granules were buried and 4-8 grams of pots with 30 cm-60 cm pot diameters were buried, and 8-10 grams of flower pots with pot diameters of more than 60 cm were buried. This drug has a long residual effect period. More than six months, at the same time, both the scale insects. Steel Road Barrier ,Buried-Free Tire Killer,Hydraulic Tyre Killer,Spikes Barrier Tyre Killer Shenzhen Unisec Technology Co.,ltd , https://www.uniqscansecurity.com