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Rice yellow stem borer

Rice yellow stem borer

Scirpophaga incertulas

A species of Scirpophaga, Also known as Yellow stem borer, Yellow paddy borer, Nutgrass armyworm, Rice stem borer

The wingspan of the male is 18–22 mm and the female is 34 mm. Adult males are smaller than the females. Males are brownish ochreous. Forewings irrorated (sprinkled) with dark scales and with the veins slightly streaked with fuscous. A black spot found at lower angle of cell. There is an oblique fuscous line runs from apex to vein 2. A marginal black specks series can be seen. Hindwings ochreous white. Female fuscous brown with pale fuscous hindwings.

General Info About Rice yellow stem borer
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Attributes of Rice yellow stem borer
Colors
Black
Orange
Habitat
rice growing area
Adult Food Sources
Flower nectar, plant sap, honeydew, water, floral honey
Larva Food Source
Rice plant tissues, rice leaf, endosperm of rice kernels, rice pollen, rice panicle
Biting/stinging
Not reported
Allergy-causing
Not reported
Defensive attack
Not reported
Venomous
Not reported
Non-poisonous
The Rice yellow stem borer is non-toxic and generally doesn't pose a risk to human health. No need for excessive worry.
Borer
Not reported
Pollinator
Not reported
Pest-Eating Predatory
Not reported
Phytophagous
The Rice yellow stem borer feeds on plants, usually without causing significant harm. However, it's important to take the situation seriously if their numbers begin to increase significantly.
Predatory
Not reported
Biting animal or pet
Not reported
Mouthparts Type
Siphoning mouthparts
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Species Status of Rice yellow stem borer
Widespread
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Distribution Area of Rice yellow stem borer
Afghanistan, Nepal, north-eastern India, Sri Lanka, Bangladesh, Myanmar, Vietnam, Thailand, Malaysia, Singapore, Sumatra, Java, Borneo, Sumba, Sulawesi, the Philippines, China, Japan
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Life Cycle of Rice yellow stem borer
Egg In the initial stage, the oval-shaped egg exhibits a creamy to pale color. Laid in clusters or singly, the eggs of rice yellow stem borer adhere to the host plant, embryonic development occurring inside.
Larva Upon hatching, the larva of rice yellow stem borer is minute and translucent, gradually darkening and enlarging through molting. This stage is dedicated to feeding and growth, accompanied by several instars.
Pupal Entering a quiescent phase, the rice yellow stem borer’s pupa encases itself in a cocoon or chrysalis, typically affixed to foliage or tucked in detritus. Transformation into the adult form occurs internally.
Adult Emerging from the pupa, the adult rice yellow stem borer’s development is marked by the presence of wings and functional reproductive organs. The body is fully formed and hardened, and the adult is mobile, focusing on reproduction.
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Adult Size of Rice yellow stem borer
1.8 - 2 cm
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Predators of Rice yellow stem borer Larvae
Birds, spiders, insects such as beetles and wasps
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Predators of Adult Rice yellow stem borer
Birds, spiders, bats, mantises
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Interesting Facts About Rice yellow stem borer
Rice yellow stem borer larvae exhibit an unusual behavior where they burrow into the stems of rice plants, which can dramatically decrease yields without visible external symptoms.
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Scientific Classification of Rice yellow stem borer
Tips for Finding Rice yellow stem borer
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Youth Habitat of Rice yellow stem borer
Agricultural and Cultivated Areas
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Adult Habitat of Rice yellow stem borer
Agricultural and Cultivated Areas, Grasslands and Prairies, Tropical Rainforests
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How Can You Attract Rice yellow stem borer
Traps with pheromones or sugary substances can attract adult rice yellow stem borer.
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Habitat Preferences of Rice yellow stem borer Through Different Life Stages
The eggs of rice yellow stem borer are typically laid on rice leaves, where conditions are optimal for incubation. As they hatch, the larvae continue to develop on the rice plant, making their way into the stalks to feed and grow. In searching for these stages, one would inspect rice paddies, focusing on the leaves and inner stalks for eggs and larvae, respectively. Pupation usually occurs within the same plant stalks or among the debris on the paddy floor. Therefore, a successful search for pupae would involve a thorough examination of these areas. The adult rice yellow stem borer tend to inhabit areas close to rice fields as they are dependent on the crop for reproduction, seeking out rice plants to lay their eggs and continue the cycle.
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When is the Best Time to Observe Rice yellow stem borer
Searching for rice yellow stem borer is best done during dusk or at night when adults are most active, while larvae can be observed during daytime.
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What is the Best Weather to Observe Rice yellow stem borer
Mild, humid weather is ideal for finding rice yellow stem borer, as these conditions are favorable for their activity and development.
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How and Where Can You Find Rice yellow stem borer at Different Life Stages
Egg Rice yellow stem borer eggs are often laid on host plants. To find them, examine the leaves of known host species for tiny, rounded eggs or egg clusters.
Larva Rice yellow stem borer larvae or caterpillars can be found on or near their food sources. Look for signs of feeding damage on plants and then inspect the leaves and stems for the presence of the larvae.
Pupal Rice yellow stem borer pupae may be attached to plants or buried in soil. Search the base of host plants or gently sift through soil near the plants to locate pupae.
Adult Rice yellow stem borer adults are attracted to light and can be found using light traps at night or by patrolling flowering plants that the adults may visit for nectar.
Are Rice yellow stem borer harmful?
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Harmful Effects of Rice yellow stem borer
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Agricultural Pests

In its larval stage, rice yellow stem borer inflicts damage by boring into stems and chewing plant tissues, predominantly affecting rice. Infestations can range from mild to severe, with heavy outbreaks potentially leading to significant yield losses. This pest may cause wilting or 'deadhearts' in young plants and 'whiteheads' at flowering, impacting food security and economic stability in affected regions.

More Effects of Rice yellow stem borer

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