Yunjia Nan field survey found that the density of this type of rice pests is relatively high
Quick Look
- A field survey at the Tainan District Agricultural Improvement Farm found that rice in the Yunjianan region has entered the middle and late stages of growth.
- In some fields, the population density of the stem borer is relatively high, and leaf curling and leaf damage have already occurred.
- Farmers are called on to strengthen inspections and timely apply pesticides within 7 days after more than one adult moth is found per square meter.
AI-generated summary
Why It Matters
Rice in southern Yunnan has entered the middle and later stages of growth. The field borer is an important pest of rice. The larvae spin silk and roll up the rice leaves longitudinally to feed on the mesophyll tissue, causing white strips of food marks, seriously affecting photosynthesis and grain yield.
Tubula borer pupae were found in the field. (Provided by Tainan Agricultural Reform Center)
Rice in southern Yunnan is entering the middle and later stages of growth. Field surveys at the Tainan District Agricultural Improvement Field found that the population density of the field borer is relatively high in some fields, and there have been leaf curls and leaf damage. It calls for strengthening prevention and control to avoid affecting the harvest.
According to the Nangai Changchang, the leaf borer, commonly known as the longitudinal leaf roller, is one of the important pests of rice. Its larvae spin silk to roll up the rice leaves vertically and hide in them to feed on the mesophyll tissue, causing the leaves to show white strips of food marks. In severe cases, the leaves will become withered and white, which will affect the photosynthesis of rice and the enrichment of the rice.
Please read on...
Recently, the population density of tuber borer has been relatively high in some fields. The Nankai Farm reminds farmers to strengthen field inspections. Since the larvae hide in the leaves after curling, it increases the difficulty of chemical control. It is recommended that after more than one adult moth is found per square meter in the field, the timing of subsequent larvae hatching can be grasped, and pesticides should be applied appropriately within 7 days.
In addition, although the current density of planthopper pests in the field is still low, as the rice enters the middle and late stages of growth, we should still pay attention to the subsequent changes in the population; the southern district changes the field to remind farmers to strengthen field inspections, paying special attention to the occurrence of planthopper pests at the base of the rice plants. If the population density reaches the control standard, control measures should be taken in a timely manner.
Nan Gai Chang emphasized that when using pesticides, be sure to use approved and registered agents, and strictly abide by the recommended dilution ratio, safe harvest period and other regulations. It is recommended to use pesticides with different mechanisms of action in rotation to reduce the risk of pests developing resistance.
Rice damaged by the larvae of the field borer. (Provided by Tainan Agricultural Reform Center)
Open Questions
- What is the current area of damaged rice fields?
- Have farmers started applying pesticides for control?
- What are the specific types and density of planthoppers?
