Prevention and Control Methods for Rose Borer
Introduction: Let's take a look at the knowledge about the prevention and control methods for rose borers in the field of green plants and flowers!
Prevention and Control Methods for Rose Borer
Symptoms of Rose Borer
The rose borer is the larva of the rose stem sawfly, boring holes in the stems and tunneling inside to eat, causing the branches to break and the upper part to wither. It usually occurs once a year,危害 from May to June, pupating inside the stems to overwinter, and is a relatively harmful pest.
Damage Caused by Rose Borer
The rose stem sawfly, also known as the rose borer, belongs to the Hymenoptera, Cimbicidae family, and is distributed in North and East China. In addition to damaging roses, it also harms other flowers such as raspberries, roses, and "ten sisters." The larvae bore into the stems of the flowers, causing the stems to break and wilt from the bored holes, posing a significant threat to roses.
Causes of Rose Borer Infestation
The appearance of rose borers may be due to insufficient ventilation, leading to high temperature and humidity in the potting soil, which attracts pests. Another possible reason could be that the roses are not exposed to sufficient sunlight, which can also lead to pest infestation.
Effective Pesticides for Controlling Rose Borer Larvae
Young larvae of the rose borer can be killed using pesticides such as dichlorvos, trichlorfon, fenvalerate, or dimethoate at a dilution of 20-30 times to wipe the oviposition slots, which works well.
Effective Medication for Treating Rose Borer
When rose borers are found, use a 25% imidacloprid solution for control. If the larvae have penetrated the roots, inject imidacloprid or diluted avermectin into the wound and seal it with soil.
Prevention and Control Methods for Rose Borer
Best Time for Preventing Rose Borer
Between August and September, based on the feces of the larvae in the holes, determine the size of the larvae and whether there are pests and their stage inside the holes. Use a sharp thin wire to insert into the top of the tunnel from the fresh fecal hole several times to kill the larvae.
Treatment Methods for Rose Borer
1. If you find stopped growth or bored holes, inspect promptly. When confirmed as borer damage, cut off the upper part from the bored hole down to the undamaged area and remove the pest. 2. After overwintering in May, when the first generation of rose borers emerge, spray 50% fenvalerate emulsifiable oil at a dilution of 1000-1200 times to kill the adults.
Preventive Measures for Rose Borer
1. During the borer period, spray dichlorvos emulsifiable oil at a dilution of 1200-1500 times, or 50% phoxim emulsifiable oil at a dilution of 1000-1500 times, or 20% cypermethrin emulsifiable oil at a dilution of 2500-3000 times to kill the pests. 2. If you find that the roses have stopped growing or have bored holes, inspect promptly. When confirmed as borer damage, cut off the upper part from the bored hole down to the undamaged area and remove the pest.
Above is a detailed explanation of the prevention and control methods for rose borers, for your reference and suggestion only!