-
Control Methods for the Dark Black Chafer in Peanut Fields
The dark black chafer is the dominant population harming peanuts in the Xinyi area, and its larvae (white grubs) not only severely damage peanut pods, but also feed on crop roots in soybean, corn, sweet potato, Chinese medicinal herb, flower and nursery stock fields. In production, corresponding measures should be taken during the adult and larval stages according to the occurrence
-
Harm and Control Methods of the White-Spotted Flower Chafer on Sunflowers
Damage characteristics: The 1st-2nd instar larvae feed on the tubular flowers; after the 3rd instar they bore along the gaps between the sunflower seeds and feed on the seeds, eating part or all of the seed kernel, resulting in empty shells or bored seed heads. They bore many tunnels in the flower head and spin silk webs on the seeds of the head, binding together insect droppings and debris, forming a felt-like mass. The damaged flower heads mostly rot and become moldy, ...
-
Sunflowers damaged by the white-spotted flower chafer: how to control them effectively?
Damage characteristics: Adults feed on the flowers of sunflowers, corn, vegetables, and fruit trees. When damaging corn, adults feed on the silks; when damaging sunflowers, they feed on the flower heads, causing the heads to rot. Morphological characteristics: Adults are 17-24 mm long and 9-12 mm wide. Oval-shaped, with a bronze or copper-green luster, and the body surface is scattered with numerous irregular white felt spots. The clypeus...
-
How to control white-spotted flower chafer pests on nectarines
[Morphology and damage symptoms] Adults are 20-24 mm long, purple-copper in color, with more than 10 irregular white spots on the pronotum and elytra. Adults gnaw ripe fruit, making it lose its commercial value. [Occurrence pattern] The white-spotted flower chafer has 1 generation per year, overwintering as larvae in soil and organic fertilizer; it readily breeds in chicken manure. Adults emerge from June to September and fly to orchards, where they like to gather and damage ripe fruit. Adults are attracted to sugar-vinegar liquid, and in July adults look for suitable places to lay eggs.
-
How to control the copper-green chafer? Practical methods shared
(1) Manual control: During the peak emergence period of adults, in the evening, kill the adults by combining artificial tree shaking with light traps outside the orchard. (2) Chemical control: In the early emergence period of adults, spray 2.5% trichlorfon powder on the tree disks of orchards with high insect density, then shallow hoe and mix it in, which can kill the adults that have emerged from the soil; during the peak period, before dark, spray the trees with 80% dichlorvos emulsifiable concentrate at 1000-1500 times dilution, adding 20% fenvalerate emulsifiable concentrate at 2000 times dilution, and spray again after 7-10 days (avoiding the flowering period), which can control the damage. Other chafer species can be controlled by
-
Identification and control methods for the copper-green chafer
[Control methods] (1) Controlling adults The adults of the above several species of chafers all have the habit of supplementary feeding, mainly feeding on the leaves of trees, fruit trees, legumes and other crops. On young fruit trees, manual control can be used to capture adults to reduce damage. (2) Chemical control 2.5% trichlorfon powder can be used, broadcast at 30 kg per hectare on field crops. 40% dimethoate or omethoate emulsifiable concentrate at 1000 times dilution, or 20% fenvalerate 300
-
A Detailed Guide to the Identification and Control Techniques of the Black Velvet Chafer
The black velvet chafer is commonly known as the "blind bumper" or "big velvet mandarin jacket." It mainly damages soybean seedlings in its adult form (the chafer), biting the growing points or severing young stems. When outbreaks are severe, it can eat the seedlings bare, causing missing plants and broken rows, or even ruining the field. This insect has one generation per year, overwintering as adults in the soil, and occurs more often in fields following soybeans. From late April to early May, it first feeds on weeds; after soybean seedlings emerge, it bites the soybean seedlings. At night this insect hides in the soil and comes out during the day to cause damage. It feeds most heavily from 3-5 pm, and the number of insects is greatest on windless, warm days. Control methods: 2.5
-
Identification and Control Methods of the Copper-Green Chafer
The copper-green chafer (Anomala corpulenta Motschulsky) belongs to the order Coleoptera, family Scarabaeidae. It occurs in all regions. It damages cruciferous crops, solanaceous crops, cucurbits, legumes and other crops. [Field identification] The larvae damage the roots and stems of seedlings, causing missing plants and broken rows, and often occur mixed with the larvae of the Northeast black chafer. Adults prefer to feed on the leaves of fruit trees, forest trees and other crops. The adult body is about 20 mm long. The head, pronotum, scutellum and elytra are copper-green with a metallic sheen,
-
What kind of pest is the Northeast giant black chafer?
〔Pest scientific name〕Holotrichia diomphalia Bates〔Damaged crops〕It damages sugar beets and various vegetables, and also damages legume and grass-family crops.〔Pest identification〕The larvae cause damage by biting through the roots and stems of vegetable seedlings, causing the whole plant to wither and die, resulting in missing plants and broken rows; they also gnaw on root tubers and stem tubers, affecting quality. The adults feed on crop leaves, especially preferring crops such as soybean and peanut, leaving holes or notches. The Northeast giant black chafer belongs to Coleoptera, Scarabaeidae.
-
How to control the cupreous chafer? Master its occurrence patterns and key control points
The cupreous chafer beetle belongs to the order Coleoptera, family Scarabaeidae. It occurs in many apple orchards in our region, and its hosts include apple, hawthorn, crabapple, pear, apricot, peach, plum, Japanese apricot, persimmon, walnut, strawberry, and so on. I. Damage symptoms: Apple trees suffer the most severe damage from the cupreous chafer beetle; the adults feed on leaves, often causing large areas of young fruit trees to have incomplete leaves, and even entire trees stripped of all leaves. II. Occurrence patterns: (I) The cupreous chafer beetle has 1 generation per year, overwintering as mature
条件筛选