Walnut Humbly Moth is a kind of insect pest that spreads quickly and is very harmful. In order to strengthen the prevention and control of walnut limb moths, the form, occurrence regularity, damage pattern, and prevention and control methods of the exoskeleton moth are introduced as follows for reference by the majority of farmers. Walnut moths, also known as walnut black or black walnut. It is common in walnut production areas in Hebei, Henan, and Shanxi provinces. Before the 1970s, there were serious ravines in the walnut production areas of the Taihang Mountains and the Yanshan Mountains in Hebei Province, and the number of walnuts killed was more than 90%. Shandong has rarely happened in the past. In the past 5 to 6 years, the moth has intruded into the townships (towns) of Ligou, Caishi, Xiying and Liuying in Licheng District of Jinan City. Jinxiuchuan Township has begun to take place in the past three years. In the Jinan walnut production area has shown a rapid spread of the situation. Morphological characteristics Adults: Females are 5 to 8 mm in length and 13 mm in wingspan. Male moths are relatively thin and are 4 to 7 mm in length. Dark dark brown with metallic sheen. Eggs: Round, initially milky white, yellow-white, yellow or light red. It is red-brown before hatching and is 0.3-0.4 mm long. Larva: The newly hatched larvae have a body length of about 1.5 mm and are milky white with a brown head. The mature larvae are 7.5 to 9 mm long, yellowish-white, with bristles at each node and dark brown heads. Cockroaches: spindle-shaped, 4-7 mm long, 2-3 mm wide, yellow-brown. 茧: brown, oblong, with a reddish-brown villi at the wider end, that is, a feathering hole, which is drilled when the adult emerges. Outside the raft, grass fine soil is attached. It is 6 to 9 mm long and 3 to 4 mm wide. Occurrence and damage One generation occurred in one year, and the mature larvae in the soil 1 to 3 centimeters (slightly deep in the soft soil) scarred overwintering. There are more shades of soil under the canopy. There are also a small number of overwintering mites beneath stones, weeds, dead leaves, and rhizomes. Overwintering larvae larvae in the middle of May (in some years in early May, phlegm), and the pupa period is 7 days. The adult period is from late May to late July, and the adult period is from early June to early July. Although the exoskeleton moth only occurs once a year, from the late May to the end of July 60 to 70 days, adult emergence, egg production, and hatching and fruiting of larvae occur daily. This brings trouble to the spray control. Adult eclosion time is generally in the afternoon, more activities in the lower canopy of the canopy, can jump, crawling fast. At rest, the hind limbs are raised laterally upwards, hence the name Limb Moth. Immediately after being frightened, the wings flew high and were generally able to fly 7 to 10 meters away. The chasing and copulation are mostly at 6 to 8 o'clock in the morning, and spawning starts after the copulation. Eggs are most prolific in the gap between the two fruiting pods, followed by stalks and stalks, and individual eggs are also produced on the petiole. More than one person can produce 3 to 4 capsules and one female moth can produce 35 to 40 capsules. After 4 to 5 days of egg hatching, the hatched larvae crawl for 1 to 3 hours into the fruit, causing damage in the skin. Into the hole, water droplets appear, and then become amber. The tunnel inside the borehole is filled with insect feces. The damaged fruit was darkened and fell off in advance. The number of larvae in one fruit can reach up to 30, and the larvae damage period is 30 to 45 days. After the larvae are mature, they drill the fruit and fall to the ground to cover the soil and winter. The mature larvae first started to detoxify in mid-July, and the fruit-losing period was in early August. Until September, there were still mature larvae that had been dehydrated during the winter. Under normal circumstances, the shady slope is more serious than the sunny slope, and the ditch is more serious than the ditch. If the prevention and control measures are not strengthened, it will inevitably cause an incalculable loss to the walnut production. Control methods 1From late May to late July, during the successive adult emergence, spawning, larval hatching, and fruiting, spraying thiophanate-methyl 1000 times every 15 to 20 days, plus Kangkuang 1000 produced by DuPont Times, or Jia Pu Zun 3000 times, or Gao Teng Teng 8000 times (purchased from Sannong Post Service Station). If the above pesticides are not available, add 1500-2000 times of pyrethroid pesticides (see bottle instructions) and spray once every 10 days. In the middle and early months of the 26th month, adult emergence emerged. During the walnut tree, 600 times of phoxim was sprayed under the ground, roots and surrounding grass roots, cracks, and stones under the walnut trees. After the spraying, the ground under the tree was smashed, and the iron squid was leveled and squeezed and sprayed 600 times with phoxim, completely eliminating the unearthed adults. 3 From the end of June to the middle and early July, remove the insects on the trees, pick up the fallen fruit under the trees, and burn them centrally or deeply to destroy the larvae in the fruit. In late May, 600 times of phoxim was sprayed under the tree roots, rhizomes and walnut trees under the surrounding grass roots, rock seams, and stones, and larvae that had just entered the soil were overwinter. Dust Facial Mask,Ear Loop Face Mask,Protective Facial Face Mask,Child Mask CE 0598 MA-009 Zhejiang Minan Medical Supplies Co.,Ltd , https://www.minanmask.com