Maize
12 pages tagged with this crop. All crops →
Scrapping of leaf surface by young larvae. Older larvae, feeds upon central whorl, causing extensive defoliation. Whorl, tassel and cob fed by larva. Identification of the pest: Egg masses (120-150 eggs/ egg mass) covered with scales Larvae wit h 4 black spots
Larva feeds on silk, developing grains and cobs. Identification of the pest: Spherical, creamy white eggs. Greenish to brown larva with brown lines dorsally white lines laterally Brown pupa on soil, leaf or crop debris Light pale brownish moth. Forewings olive
Yellowing of leaves Colonies of aphids found in leaf whorl and cob sheath. Identification of the pest: Yellowish with dark green legs Management: Seed treatment with thiamethoxam 70%WS @ 3.5 g/kg seed Conservation of natural enemies such as coccinellids, chrys
Leafhopper: Pyrilla perpusilla Symptom of damage: Leaves become yellow Covered with black sooty mould Top leaves get dried up and lateral buds germinate Identification of the pest: Nymph: Soft, pale brown dorsally and pale orange ventrally Adult: Straw coloure
Ash weevil: Myllocerus sp. Symptom of damage: Grubs feed on the secondary rootlets Adults cause irregular notching on the leaf margins Identification of the pest: Adult: Grey coloured weevil Larva – Grubs have four instars. Larval period - 55 – 70 days. Pupa –
Larva first feeds on the lemma of the flowers scraping the chlorphyll, later on the milky grains. Webbing of maize cobs and feeding on the flowers and the grains Identification of the pest Larva: Long and dark brown Adult: Dark grey forewings Pupa – Pupal peri
Nymphs and adults are seen on earhead and sucks juice from grains at milky stage. Grains shrink and turn black becomes ill filled or chaffy Identification of the pest: Blue cigar shaped eggs, laid under glumes or middle of the florets. Slender green coloured n
Corn worm /Earworm: Helicoverpa armigera Larva feeds on silk, developing grains and cobs. Spherical, creamy white eggs. Greenish to brown larva with brown lines dorsally white lines laterally Brown pupa on soil, leaf or crop debris Light pale brownish moth. Fo
Pink larva damage stem leading to dead heart Larva Identification of the pest: Bead like eggs laid in rows within leaf sheath Pinkish brown larvae with dark head Straw coloured moths with white wings Egg Management: When infestation crosses 10%, spray phosalon
Central shoot dries leading to dead heart Young larva feeds tender folded leaves causing “shot hole” symptom. Old larvae bores stem and feeds on internal tissues. Bore holes and tunneling noticed on stem. Identification of the pest: Yellowish brown larva with
Plants become unhealthy stunted and yellow The leaves wither from top downwards Panicle formation is inhibited and the plants die if attack is severe. Honeydew secreted by the bug causes growth of sooty mould on leaves. Midribs turn red due to egg-laying and m
Infests crop from 2 days to 3 weeks after emergence. Maggots feed on young growing shoots causing dead heart Identification of pest : Eggs white, elongated, looks like a rice grain. Yellowish maggots. Pupa dark brown, barrel-shaped. Adult, small grey coloured