TNAU Agritech Portal :: Crop Protection
Chilli thrips: Scirtothrips dorsalis
Symptoms of damage |
- The infested leaves develop crinkles and curl upwards
- Elongated petiole
- Buds become brittle and drop down.
- Early stage, infestation leads to stunted growth and flower production, fruit set are arrested
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Chilli thrips infestation - upward curling
![](thump/chilli_thrips_sym.png) |
Chilli thrips infestation - upward curling
![](thump/chilli_thrips_sym1.png) |
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Identification of pest |
- Nymphs: Tiny, slender, fragile and straw yellow in colour
- Adult: with heavily fringed wings
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Adult
![](thump/chilli_thrips_iden.png)
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Management |
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Inter crop with agathi Sesbania grandiflora to provide shade which regulate the thrips population
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Do not grow chilli after sorghum – more susceptible to thrips
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Do not follow chilli and onion mixed crop – both the crops attacked by thrips
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Sprinkle water over the seedlings to check the multiplication of thrips
- Treat seeds with imidacloprid 70% WS @ 12 g /kg of seed
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Apply carbofuran 3% G @ 33 kg /ha or phorate 10 % G @ 10 kg/ha or spray any one of the following insecticide
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Insecticide |
Dose |
Imidacloprid 17.8 % SL |
3.0 ml/10 lit. |
Dimethoate 30 % EC |
1.0 ml/lit. |
Emamectin benzoate 5 % SG |
4 g/10 lit. |
Ethion 50 % EC |
2.0 ml/lit. |
Fipronil 5 % SC |
1.5 ml/lit. |
Oxydemeton –Methyl 25 % EC |
1.0 ml/lit. |
Phosalone 35 % EC |
2.0 ml/lit. |
Spinosad 45 % SC |
3.2 ml/10 lit. |
Thiacloprid 21.7 % SC |
6.0 ml/10 lit. |
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Green peach aphid: Myzus persicae
Symptoms of damage |
- The infested plants turn pale with sicky appearance.
- The leaves curled and crinkled
- Honeydew excrete - development of sooty mould
- Stunted growth of the plant
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Green peach aphid infestation - Crinkling
![](thump/chilli_greenpeach_sym.png) |
Green peach aphid infestation - Crinkling
![](thump/chilli_greenpeach_sym1.png) |
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Identification of pest |
- Nymphs initially are greenish, but soon turn yellowish.
- Adults – yellowish green in colour
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Management |
- Treat seeds with imidacloprid 70% WS @12 g /kg of seed
- Apply phorate 10 % G @ 10 kg/ha or spray any one of the following insecticide
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Insecticide |
Dose |
Carbosulfan 25 % EC |
1.0 ml/lit. |
Fipronil 5 % SC |
1.0 ml/lit. |
Imidacloprid 17.8 % SL |
3.5 ml/10 lit. |
Oxydemeton –Methyl 25% EC |
1.6 ml/lit. |
Phosalone 35 % EC |
2.0 ml/lit. |
Quinalphos 25 % Gel |
1.0 ml/lit. |
Quinalphos 25 % EC |
1.0 ml/lit. |
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Tobacco cutworm: Spodoptera litura
Symptoms of damage |
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Newly hatched larvae scrap the green matter in the leaf
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Affected leaf looks like a papery white structure
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Later instar larvae feed by making small holes
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In severe infestations they feed voraciously on the entire lamina, petiole and some times
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even the tender twigs on the terminal shoots of plants.
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Also feed on the floral parts and bore into the fruits.
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Identification of pest |
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Larva
- Young caterpillars are light green with black head or black spots
- Gregarious in the early stages
- Grown caterpillars are grey or dark brown
Adult
- Forewings – brown colour with wavy white marking
- Hindwings- white colour with a brown patch along the margin
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Management |
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Plough the soil to expose and kill pupae
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Castor as a trap crop
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Set up pheromone trap @ 15/ha
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Collect and destroy the egg masses, gregarious larvae and grown up caterpillars
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Spray SINPV @ 1.5*10 12 POB/ha in evening hour
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Insecticide |
Dose |
Emamectin benzoate 5 % SG |
4 g/10 lit. |
Flubendiamide 20 WDG |
6.0 g /10 lit. |
Indoxacarb 14.5 % SC |
6.5 ml/10 lit. |
Novaluron 10 % EC |
7.5 ml/10 lit. |
Spinosad 45 % SC |
3.2 ml/10 lit. |
Thiodicarb 75 % WP |
2.0 g/lit. |
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Gram caterpillar: Helicoverpa armigera
Identification of pest |
Larva feeding
![](thump/chilli_gram_iden.png) |
Larva feeding
![](thump/chilli_gram_iden2.png) |
Adult
![](thump/chilli_gram_iden1.png) |
Adult
![](thump/chilli_gram_iden3.png) |
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- Eggs – are spherical in shape and creamy white in colour, laid singly
- Larva - shows colour variation from greenish to brown
- Pupa – brown in colour, occurs in soil, leaf, pod and crop debris
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- Adult - Female brownish yellow stout moth
- Male – light greenish in colour
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Management |
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Insecticide |
Dose |
Emamectin benzoate 5 % SG |
4 g/10 lit. |
Flubendiamide 20 WDG |
6.0 g /10 lit. |
Indoxacarb 14.5 % SC |
6.5 ml/10 lit. |
Novaluron 10 % EC |
7.5 ml/10 lit. |
Spinosad 45 % SC |
3.2 ml/10 lit. |
Thiodicarb 75 % WP |
2.0 g/lit. |
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Yellow mite or muranai mite: Polyphagotarsonemus latus
Symptoms of damage |
- Downward curling and crinkling of leaves
- Leaves with elongated petiole
- Stunted growth
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Yellow mite infestation - downward curling of leaves
![](thump/chilli_ymite_sym.png) |
Yellow mite infestation - downward curling of leaves
![](thump/chilli_ymite_sym1.png) |
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Identification of pest |
- Oval shaped eggs and white in colour
- Eggs glued firmly on the leaf surface
- Nymphs white in colour
- Adult : large, oval and broad and yellowish in colour
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Yellow mite - Adult
![](thump/chilli_ymite_iden.png) |
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Management |
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Insecticide |
Dose |
Buprofezin 25 % SC |
8.0 ml/10 lit. |
Chlorfenapyr 10 % SC |
1.5 ml/lit. |
Diafenthiuron 50 % WP |
8.0 g/10 lit. |
Dimethoate 30 % EC |
1.0 ml/lit. |
Ethion 50 % EC |
2.0 ml/lit. |
Fenazaquin 10 % EC |
2.0 ml/lit. |
Fenpyroximate 5 % EC |
1.0 ml/lit. |
Hexythiazox 5.45 % EC |
8.0 ml/10 lit. |
Milbemectin 1 % EC |
6.5 ml/10 lit. |
Oxydemeton –Methyl 25 % EC |
2.0 ml/lit. |
Phosalone 35 % EC |
1.3 ml/lit. |
Propargite 57 % EC |
2.5 ml/lit. |
Quinalphos 25 % EC |
1.5 ml/lit. |
Spiromesifen 22.9 % SC |
5.0 ml/10 lit. |
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