critical severity

Indwara y'Ibigori Yica AmababiIdentification & Treatment Guide 2026

Maize chlorotic mottle virus + Sugarcane mosaic virus · Family: Tombusviridae

Indwara y'ibigori yica amababi iterwa no guhura kwa virusi ebyiri. Itera guhinduka umuhondo kw'amababi, gukenera gukurikira imirongo y'imitsi, no gupfa kw'igihingwa. Irwanywa no gukoresha imbuto zisukuye, kurwanya udukoko bikwirakwiza virusi, no gukuraho ibihingwa byanduye. Nta muti uhari.

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Quick Diagnosis

critical

Indwara y'Ibigori Yica Amababi

Affects: leavesstemsearstassels
Peak Season: Main and short rainy seasons; worst when both virus vectors (thrips and aphids) are active simultaneously
Spread Risk: Fast
Spread By: Thrips (MCMV), aphids (SCMV), contaminated seed (MCMV), soil (MCMV), mechanical contact

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Symptoms: What does Indwara y'Ibigori Yica Amababi look like?

Visual identification guide — tap each stage for details

Chlorotic mottling on young maize leaf from early MLN — Fine chlorotic mottling on young leaves, initial MLN symptom

Leaf necrosis progressing from margins in maize with MLN — Necrosis advancing from leaf edges inward, mid-stage MLN

Dead maize plants with empty ears from severe MLN — Complete plant death with barren, unfilled ears

Intambwe ya mbere

Chlorotic mottling on young leaves
Amababi agaragaza guhinduka umuhondo gukurikira imirongo y'imitsi (chlorotic mottle). Imirongo mishya y'umuhondo igaragara ku mababi mashya.

Intambwe yo hagati

Leaf necrosis from edges inward
Amababi ahinduka umuhondo wose nyuma akuma. Igihingwa kihagarara mu mikurire. Igisakaramentu cy'ibigori gishobora kugaragara ariko ntigibyare neza.

Intambwe y'imperuka

Complete plant death and barren ears
Igihingwa gipfa cyose. Amababi yose akuma. Igisakaramentu gitanga imbuto nke cyangwa ntazo. Igihingwa gishobora kumena bitewe n'ubukenere.

Causes: Why is my plant getting Indwara y'Ibigori Yica Amababi?

Environmental triggers and disease cycle

Presence of both MCMV and a potyvirus (SCMV) in the same area
High populations of thrips (Frankliniella williamsi) transmitting MCMV
High aphid populations transmitting SCMV
Contaminated seed carrying MCMV
Continuous maize monoculture
Planting during peak vector activity periods

Disease Lifecycle

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Host Plant

Susceptible crop

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Pathogen

Machlomovirus

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Conditions

Main and short rainy seasons; worst when both virus vectors (thrips and aphids) are active simultaneously

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Infection

Penetrates tissue

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Symptoms

Visible signs

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Spread

Thrips (MCMV)

Often confused with: Indwara ya Virusi y'Imirongo y'Ibigori, Utusozi tw'Ikijuju ku Mababi y'Ibigori, Umukungugu w'Ikigaju. See our comparison guide.

How to Treat Indwara y'Ibigori Yica Amababi

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Organic Treatment Steps

4 steps

Kuramo ibihingwa byanduye vuba kugira ngo ugabanye isoko ya virusi.
Koresha amavuta ya neem (5 ml/L) kugira ngo urwanye udukoko bikwirakwiza virusi.
Shyiraho udufatiro tw'umuhondo kugira ngo ufate udukoko bikwirakwiza.
Koresha ibihingwa bitandukanye mu murima umwe (intercropping) kugira ngo ugabanye ikwirakwira.

🧪 ChemicalUse protective equipment

Chemical Treatment Steps

4 steps

Kuvura imbuto na imidacloprid mbere yo gutera kugira ngo wirinde udukoko bya mbere.
Kuvuza thiamethoxam (Actara) ku 0.5 g/L amazi kugira ngo urwanye udukoko bikwirakwiza virusi.
Kuvuza lambda-cyhalothrin ku 1 ml/L amazi kugira ngo urwanye isazi n'udukoko.
Hindura ubwoko bw'imiti kugira ngo wirinde udukoko guhangana n'imiti.

Prevention & Seasonal Calendar

Year-round protection plan for your crops

Pre-Planting

Gukoresha imbuto zisukuye zizwi nta virusi
Kurwanya udukoko bikwirakwiza virusi (isazi n'ibindi)
Guhindura ibihingwa — kutagira ibigori mu murima ibihe byose

Mid-Season

Gukuraho imyanda y'ibihingwa nyuma yo gusarura
Kutagira ibihingwa bishaje by'ibigori hafi y'ibishya
Gukurikirana imirima buri gihe no gukuraho ibihingwa byanduye

Post-Harvest

Gukoresha ubwoko bw'ibigori bufite ubudahangarwa buke

🛡️ Resistant Varieties

CIMMYT MLN-tolerant hybridsWE1101KH600-23AH6218

🌼 Companion Planting

These plants can reduce Indwara y'Ibigori Yica Amababi pressure when grown nearby:

beandesmodiumcowpea

View full seasonal calendar for your region →

Frequently Asked Questions

Common questions about Indwara y'Ibigori Yica Amababi

Indwara y'ibigori yica amababi ishobora gukizwa?

Oya, nta muti uhari kuko iterwa na virusi. Iyo igihingwa cyanduye, ntacyo ushobora gukora kuri cyo. Imicungire yose ishingiye ku kwirinda.

Virusi ebyiri zikenewe kugira ngo indwara igaragare?

Yego, indwara y'ibigori yica amababi igaragara gusa iyo virusi ebyiri (MCMV n'imwe mu Potyviridae) zihuye mu gihingwa kimwe. Virusi imwe itera ibimenyetso by'agahengeri gusa.

Iyi ndwara iri mu Rwanda?

Yego, indwara y'ibigori yica amababi yagaragaye mu Burayi Bushya bw'Uburasirazuba harimo u Rwanda. Ni ngombwa kuyikurikirana no kuyirwanya vuba.

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Related Disease

Indwara ya Virusi y'Imirongo y'Ibigori

Maize streak virus (MSV)

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Related Disease

Utusozi tw'Ikijuju ku Mababi y'Ibigori

Cercospora zeae-maydis

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Affected Plant

Maize (Corn)

Zea mays

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Treatment Guide

Full Treatment Protocol

Detailed spray schedule & dosage guide

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