-
What pesticide is effective for controlling the pagoda tree looper (Sophora japonica looper)?
Sophora japonica (Sophora japonica) has relatively strong pollution resistance and good greening effects, and is one of the main tree species for landscaping. However, Sophora japonica is often harmed by the Sophora japonica looper during cultivation. When it occurs severely, it often eats all the leaves of an entire tree within 1 week and spins silk and excretes frass, seriously affecting the growth
-
-
What are the control methods for the black-marked looper moth on black locust?
Control methods for the black-marked looper moth on black locust: 1. Use light traps to kill adult moths. 2. Protect and make use of natural enemies, such as braconid wasps. 3. During the outbreak period, spray insecticides such as 50% fenitrothion emulsifiable concentrate at 1000 to 1500 times dilution, 2.5% deltamethrin emulsifiable concentrate at 2000 to 3000 times dilution, or 90% trichlorfon crystal at 800 to 2000 times dilution.
-
Identification Features and Control Methods of the Privet Looper
Scientific name: Naxa seriaria Motschulsky. Morphological features: The adult has a wingspan of about 40 mm, with a slender body that is yellow-white. The forewings and hindwings are thin, white, and slightly transparent, with two rows of black star-shaped spots along the outer margin, and each wing has a relatively large black spot in the middle. The forewing also has a row of dark brown spots near the basal angle. Newly laid eggs are white, gradually turning orange-red, glossy, and arranged in bead-like strings. The larva is about 30 mm long, dark brown, with indistinct black patterns and spots on its body. Except for the thoracic legs and the prolegs on the eighth and ninth abdominal segments, the prolegs on the other segments are all reduced, and each segment is covered with gray-white hairs. The pupa is yellow-brown with dark brown spots and patterns. Damage situation: This insect mainly damages privet (Ligustrum), water wax (Ligustrum obtusifolium), and osmanthus (Osmanthus fragrans). It is a voracious leaf-eating pest that often gathers in groups and nibbles away the leaves. Especially when the population density is high, it can completely devour the leaves of an entire plant or a whole patch of water wax and privet in a short period, seriously affecting growth and ornamental value. Occurrence pattern: This insect has two generations per year and overwinters as middle-instar larvae on the tree canopy. Pupation begins in mid-May, and adults emerge at the end of May and in early June. Adults mate on silk webs and lay eggs in strings. After the eggs hatch, the larvae spin silk webs on the tree canopy and nibble the leaves until they are eaten up, then spread to neighboring canopies. The second-generation adults appear around August, and the adults are phototactic. Control methods: 1. During the peak emergence period of adults, use lights to trap and kill the adults. 2. The pupae and eggs are all attached to the insect silk webs near the tree canopy, so they can be searched for and removed. 3. In the early stage of larval hatching, spray 1-2 times with insecticides such as dichlorvos, trichlorfon, and omethoate at a 1000-fold dilution. This insect has strong resistance to pesticides, so spraying should be thorough and should be done early; otherwise, the efficacy will be affected.
-
What are the control methods for the Ligustrum looper moth?
The adult Ligustrum looper moth has wing patterns that slightly resemble the woven texture of a basket, with distinctive features, and a wingspan of about 9-10cm, making it a large moth. The larvae are grayish-black, or brightly colored in lighter shades; when young, the 2nd and 3rd body segments each bear two dorsal horns, and when nearly mature, the 2nd and 3rd segments swell and the area around the spiracles is vividly colored. When disturbed, the larvae can produce a cackling sound from their mouths. Adults emerge in June-July. Host plants include Ligustrum lucidum (glossy privet), Ligustrum sinense (Chinese privet), Ligustrum japonicum (Japanese privet), Fraxinus chinensis (Chinese ash), Osmanthus fragrans (sweet osmanthus), and others. Currently it is the period when older larvae are causing damage, and it is commonly seen in our area. Control methods:
-
Control Methods for the Ligustrum Looper Moth Damaging Ornamental Garden Trees
Distribution and Damage The ligustrum looper moth Naxa seriaria Motschulsky, also known as the lilac looper moth, belongs to the order Lepidoptera, family Geometridae. It is distributed throughout Northeast, North, Northwest, Southwest and East China. The larvae damage Syringa reticulata, Syringa pekinensis, Syringa reflexa, Syringa oblata, Syringa wolfii, Syringa oblata var. alba, ligustrum, large-leaved ligustrum, osmanthus, camellia, tea, privet, Manchurian ash and Chinese ash, etc. The larvae gather in groups to feed on leaves and often strip the leaves completely. The larvae have the habit of spinning silk to form webs; in severe cases the webs cover the tree crown,
-
What are the pollution-free control methods for the jujube looper moth?
The control principle is to make use of its characteristics of overwintering under the tree and the wingless female moth, strengthen control efforts under the tree, and eliminate or stop the female moths from climbing the tree to lay eggs. Large-scale control can reduce the insect population by 80%-90%. On this basis, to eliminate the larvae that slip through the net on the tree, pollution-free pesticides can be used for control. 1. Artificial pupa digging. Before the adults emerge in spring, turn the soil within 1 m around the tree and 15 cm deep to dig out pupae, collect the pupa clumps and dispose of them in a centralized manner. You can also deep-plow the tree in autumn to destroy its overwintering sites so that it cannot
-
Biological Characteristics and Control Methods of the Black-spotted Looper Moth on Black Locust
Black-spotted looper moth on black locust. It belongs to the family Geometridae, order Lepidoptera, and is also known as the black locust looper. It is distributed in the black locust forest areas of the old course of the Yellow River in Anyang, Puyang, Xinxiang and Kaifeng cities of Henan Province, mainly damaging black locust (Robinia pseudoacacia), and in outbreak years it can also damage jujube trees and crops. This insect is voracious, and in a short time it can eat all the leaves of entire branches and entire trees. In hot and dry years, it can strip the leaves bare 2 to 3 times a year, causing the upper parts of the trees to die and new shoots to sprout from the middle and lower parts of the trunk, causing serious harm to tree growth. Control methods: (1) Establish
-
Key Points of Boxwood Looper Control Techniques Explained
I. Damage symptoms: Euonymus bungeanus, boxwood, Euonymus alatus, elm, poplar, willow, etc. The larvae gather on leaves to feed; after eating the leaves bare, they gnaw the bark of tender branches, causing the whole plant to die. II. Occurrence pattern: 2-3 generations per year, overwintering as pupae. Adults rest in hidden spots among branches and leaves during the day, and emerge at night to move about, mate and lay eggs; eggs are laid on the underside of leaves, arranged in double rows or in masses. Egg masses contain dozens to over a hundred eggs. Hatching mostly occurs in the morning from 5:00-8:00; the larvae gather on the underside of leaves to cause damage, chewing leaves and the bark of tender branches; mature larvae spin silk and drop to the soil to pupate.
-
What are the control methods for the Euonymus looper (large-leaf Euonymus inchworm)?
Occurrence pattern: The large-leaf Euonymus looper damages plants by the larvae feeding on leaves. It has three generations in Hunan. The overwintering generation adults emerge and lay eggs in mid-April, damage begins in late April, they successively enter the soil to pupate in late May, emerge in mid-June, the second generation causes damage in late June, enters the soil to pupate in early August, emerges in mid-August, and the third generation causes damage in late August. The most severe damage is caused by the first and second generations. Damage is most severe in seasons with mild climate and abundant rainfall. During the peak damage period, 2 to 3 days can strip all the leaves from the whole plant, leaving the plant bare. In
条件筛选