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Pests of Paddy. LEAF, STEM AND SEED SUCKING INSECTS.

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Presentation on theme: "Pests of Paddy. LEAF, STEM AND SEED SUCKING INSECTS."— Presentation transcript:

1 Pests of Paddy

2 LEAF, STEM AND SEED SUCKING INSECTS

3 Nephotettix spp. Homoptera:Cicadellidae Homoptera:Cicadellidae Bena hijau/leafhopper Bena hijau/leafhopper Suck the leaf, stem and rice grain (biji) Suck the leaf, stem and rice grain (biji) Pest: nymph and adult Pest: nymph and adult Transmits virus diseases such as tungro (N. virescens), yellow dwarf, yellow-orange leaf Transmits virus diseases such as tungro (N. virescens), yellow dwarf, yellow-orange leaftungro Simptom: leaf yellowish and dry,small grain,, sterile, plant stunted Simptom: leaf yellowish and dry,small grain,, sterile, plant stunted

4 Nephotettix virescens Nephotettix virescens

5 Control measures: Control measures: 1) dry the field after harvesting 1) dry the field after harvesting 2) destroy the remaining rice plants after harvesting( esp. those which are infected) 2) destroy the remaining rice plants after harvesting( esp. those which are infected) 3)area with severe damage: use insecticide one week after seeding 3)area with severe damage: use insecticide one week after seeding Racun: 0.1% carbaryl, dimethoate Racun: 0.1% carbaryl, dimethoate Biocontrol: Miridae (hemiptera), nematode parasitize nymph & adult Biocontrol: Miridae (hemiptera), nematode parasitize nymph & adult

6 Nilaparvata lugens Homoptera: Delphacidae Homoptera: Delphacidae Bena perang/ brown planthopper Bena perang/ brown planthopper Suck the sap of a growing padi plant( near water level) Suck the sap of a growing padi plant( near water level) Nymphs and adults cause damage Nymphs and adults cause damage

7 A high density of population  HOPPERBURN A high density of population  HOPPERBURN crops dries up in round patches, brownish color crops dries up in round patches, brownish color Disease: ragged stunt, grassy stunt Disease: ragged stunt, grassy stunt

8 draining the rice field for 3-4 days is recommended during the early stage of infestation. draining the rice field for 3-4 days is recommended during the early stage of infestation. Nitrogen application can be split to reduce BPH buildup. Nitrogen application can be split to reduce BPH buildup. Maintaining a free-rice period could also decrease the build-up of population Maintaining a free-rice period could also decrease the build-up of population Spray with acephate 0.1% a.i, phenthoate 0.05% a.i Spray with acephate 0.1% a.i, phenthoate 0.05% a.i

9 Biocontrol: use of spiders (predators) eg: Lycosa pseudoannulata (20 BPH/day) Biocontrol: use of spiders (predators) eg: Lycosa pseudoannulata (20 BPH/day)

10 Scotinophora coarctata Hemiptera:Pentatomidae Hemiptera:Pentatomidae Kutu beruang/rice black bug Kutu beruang/rice black bug Adult & nymph Adult & nymph Suck sap from base of padi stem Suck sap from base of padi stem

11 Weakening padi, seed production decrease,, severe: padi stunted, leaves turn reddish brown Weakening padi, seed production decrease,, severe: padi stunted, leaves turn reddish brown Control: During early infestation, the water level in the field may be raised for 2-3 days to force the insects to move upwards. Control: During early infestation, the water level in the field may be raised for 2-3 days to force the insects to move upwards. Flooding the fields can also cause higher egg mortality. Flooding the fields can also cause higher egg mortality. After harvest, fields might be plowed to remove remaining insects After harvest, fields might be plowed to remove remaining insects

12 Sogatella furcifera Homoptera: Delphacidae:planthopper Homoptera: Delphacidae:planthopper Adult and nymph Adult and nymph Suck the sap from leaf blade and leaf sheath Suck the sap from leaf blade and leaf sheath Symptom; reddich brown patches on leaf, for serious infestation you can see yellow patchesControl: drain off water 2-3 days,then flood again (same like Nilaparvata lugens) Symptom; reddich brown patches on leaf, for serious infestation you can see yellow patchesControl: drain off water 2-3 days,then flood again (same like Nilaparvata lugens)

13 spray gamma BHC, endosulfan, carbaryl ( all 0.1% a.i) spray gamma BHC, endosulfan, carbaryl ( all 0.1% a.i) Use Metarhizium anisopliae (fungus) Use Metarhizium anisopliae (fungus) foliar spraying of insecticides directed at the base of the rice plant is the most effective foliar spraying of insecticides directed at the base of the rice plant is the most effective

14 PENGOREK BATANG (STEMBORER)

15 Scirpophaga incertulas Lepidoptera:Pyralidae Lepidoptera:Pyralidae Yellow stemborer Yellow stemborer The caterpillars bore into the rice stem and hollow out the stem completely The caterpillars bore into the rice stem and hollow out the stem completely the early stages of growth, drying up of young leaves or death of tillers. Attack is more common at 'bunting' stage and then the ear may not emerge and if it does ;it may be empty the early stages of growth, drying up of young leaves or death of tillers. Attack is more common at 'bunting' stage and then the ear may not emerge and if it does ;it may be empty

16 Control: control measures e.g. spraying surface of water at maximum tillering may be useful Control: control measures e.g. spraying surface of water at maximum tillering may be useful

17 PEMAKAN DAUN leaf eater

18 Spodoptera litura Lepidoptera:Noctuidae Lepidoptera:Noctuidae Ulat ratus/armyworm Ulat ratus/armyworm Eat leaf-blades, particularly serious in nursery and dry padi. Eat leaf-blades, particularly serious in nursery and dry padi. Control: Control: Dust 25 lb per acre of a mixture of 5% DDT dust and wood ash. Dust 25 lb per acre of a mixture of 5% DDT dust and wood ash. 2. If possible, flood the nursery. 2. If possible, flood the nursery. 3. Spray with 3 pints 25% DDT emulsion in gallons of water per acre. 3. Spray with 3 pints 25% DDT emulsion in gallons of water per acre.

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