Liaf Mainar(a.g.college Gwalior)
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- Words: 342
- Pages: 9
SYSTEMIC POSITION Scientific Name Class Family
-
Chromotomyia horticola Insecta diptera Agromyzidae
Host Plant
-
Pea, Cauliflower, cabbage,
Order
Potato
Nature of Damage The larvae are small caterpillars which feed on the green tissue inside the leaf, leaving the transparent upper and lower membranes (epidermis) intact.The young larvae enter the leaf and form serpentine mines (narrow, greybrown or silvery tracks). As the larva matures, it consumes a broader patch of the leaf, forming blotch mines. Later holes are produced as the mined tissues are destroyed. The lower surface of the infested leaves become dirty with small grains of blackish frass and show silken webbings containing the small pupae. During high infestation, the leaves become brown. A serious outbreak can cut down the effective leaf surface for plant food production resulting in reduced storage root yield.
Stage Egg. The eggs are oval, flattened against the leaf surface;
translucent, greenish white with granulate surface which turns yellowish when about to hatch. Larva. The emerging larvae are distinctly segmented with a rather pointed heads and abdomens. A mature larva measures 5.5 mm long. The larva has a yellowish body with paired pink spots on the dorsolateral sides of the thorax which later disappear and are replaced by red tubercles in all segments. Pupa. The pupae measuring 3.5 mm appear green at first with mottled red markings. Later the red markings disappear and they turn dark brown with lateral projections on the abdomen. Adult. The adults are very small moths, 3.5 - 4.0 mm long with grayish to brown bodies and light brown scales.
Life cycle EGG 35 0
3-4 days
ADULT
Complete metamorphosis December - May
MAGGOT
Many Generations / Year
5-12 Days
7-15 Days PUPA
Leaf miner larvae inside mines (E. Vasquez).
Silky webs under the leaf containing pupae (E. Vasquez).
Control Biological control
Leaf miners are generally controlled by predators and parasites like Apanteles sp. Chemical control The insecticides recommended for leaf miner control include carbaryl, chlorfenvinphos, diazinon, dimethoate and trichlorphon.
References
FOOD AND NUTRITION BY B.SHRI LAKSMI
en.wikipedia.org/wiki/Leaf Ikishan.com www.occrra.org
-
Chromotomyia horticola Insecta diptera Agromyzidae
Host Plant
-
Pea, Cauliflower, cabbage,
Order
Potato
Nature of Damage The larvae are small caterpillars which feed on the green tissue inside the leaf, leaving the transparent upper and lower membranes (epidermis) intact.The young larvae enter the leaf and form serpentine mines (narrow, greybrown or silvery tracks). As the larva matures, it consumes a broader patch of the leaf, forming blotch mines. Later holes are produced as the mined tissues are destroyed. The lower surface of the infested leaves become dirty with small grains of blackish frass and show silken webbings containing the small pupae. During high infestation, the leaves become brown. A serious outbreak can cut down the effective leaf surface for plant food production resulting in reduced storage root yield.
Stage Egg. The eggs are oval, flattened against the leaf surface;
translucent, greenish white with granulate surface which turns yellowish when about to hatch. Larva. The emerging larvae are distinctly segmented with a rather pointed heads and abdomens. A mature larva measures 5.5 mm long. The larva has a yellowish body with paired pink spots on the dorsolateral sides of the thorax which later disappear and are replaced by red tubercles in all segments. Pupa. The pupae measuring 3.5 mm appear green at first with mottled red markings. Later the red markings disappear and they turn dark brown with lateral projections on the abdomen. Adult. The adults are very small moths, 3.5 - 4.0 mm long with grayish to brown bodies and light brown scales.
Life cycle EGG 35 0
3-4 days
ADULT
Complete metamorphosis December - May
MAGGOT
Many Generations / Year
5-12 Days
7-15 Days PUPA
Leaf miner larvae inside mines (E. Vasquez).
Silky webs under the leaf containing pupae (E. Vasquez).
Control Biological control
Leaf miners are generally controlled by predators and parasites like Apanteles sp. Chemical control The insecticides recommended for leaf miner control include carbaryl, chlorfenvinphos, diazinon, dimethoate and trichlorphon.
References
FOOD AND NUTRITION BY B.SHRI LAKSMI
en.wikipedia.org/wiki/Leaf Ikishan.com www.occrra.org
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