Lingaiah, T.

• Safety of Combination Products and Single Compound Insecticides to Microvelia Douglasi Atrolineata Bergroth, a Predator of Planthoppers in Rice

Abstract Views :207  |  PDF Views:128

Authors

V. Jhansi Lakshmi ¹, I. C. Pasalu ¹, N. V. Krishnaiah ¹, T. Lingaiah ¹

Affiliations
1 Directorate of Rice Research (ICAR) Rajendranagar, Hyderabad 500030, Andhra Pradesh, IN

Source

Journal of Biological Control, Vol 17, No 2 (2003), Pagination: 121-124

Abstract

Greenhouse studies were carried out on relative safety of insecticides to veliid bug, Microvelia douglasi atrolineata, a predator of plantboppers in rice. Tbe results indicated tbat four combination products, viz., chlorpyriphos 50% + cypermethrin 5% at 344 ppm; betacyfluthrin 1.25% + chlorpyriphos 25% at 393 ppm; acepbate 45% + cypermetbrin 5% at 500 ppm and imidacloprid 5% + betacyfluthrin 5% at 30 ppm and two single compounds, viz., betacyfluthrin at 12.5 ppm and thiacloprid at 120 ppm were more toxic than monocrotophos (500 ppm) and acephate (750 ppm).

Keywords

Combination Products, Microvelia Douglasi atrolineata, Relative Safety.

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• Comparative Biology and Prey Preference of Cyrtorhinus lividipennis Reuter and Tytthus parviceps (Reuter) (Hemiptera:Miridae) on Planthoppers and Leafhopper of Rice

Abstract Views :283  |  PDF Views:128

Authors

V. Jhansi Lakshmi ¹, I. C. Pasalu ¹, K. Krishnaiah ¹, T. Lingaiah ¹

Affiliations
1 Department of Entomology, Directorate of Rice Research, Rajendranagar, Hyderabad 500 030, IN

Source

Journal of Biological Control, Vol 16, No 2 (2002), Pagination: 103-107

Abstract

Biology and host preference of Cyrtorhinus lividipennis and Tytthus parviceps and their predatory efficiency on rice planthoppers and leafhoppers were studied in the greenhouse. The fecundity, nymphai survival, body weight and body size of both C. lividipennis and T. parviceps were significantly higher on BPH oviposited plants compared to those on WBPH or GLH ofiposited plants. There was no significant difference in the adult female and male longevity on different hosts. In general, the adults survived for 11-20 days. The pre-oviposition period ranged from 1.5 to 2.8 days on different hosts. Incubation and nymphai periods were prolonged on GLH oviposited plants compared to BPH and WBPH oviposited rice plants. In both choice and no choice tests, C. lividipennis and T. parviceps preferred and consumed more BPH and WBPH eggs than GLH eggs.  nymphs were better predators than adults whereas the predatory efficiency of nymphs and adults was similar in T. parvicepsC. lividipennis. It is evident that BPH is the preferred and primary host for both C. lividipennis and T. parviceps and they secondarily adapted to WBPH and GLH.

Keywords

Biology, Cyrtorhinus lividipennis, Nephotettix virescens, Nilaparvata lugens, Prey Preference, Sogatella furcifera, Tytthus parviceps.

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• Safety of some Insecticides to Brown Mirid Bug, Tytthus parviceps (Reut.) (Hemiptera: Miridae), a Predator of Brown Planthopper, Nilaparvata lugens (Stal) (Homoptera: Delpbacidae) in Rice

Abstract Views :246  |  PDF Views:121

Authors

V. Jhansi Lakshmi ¹, N. V. Krishnaiah ¹, I. C. Pasalu ¹, T. Lingaiah ¹, K. Krishnaiah ¹

Affiliations
1 Department of Entomology Directorate of Rice Research Rajendranagar, Hyderabad 500030, Andhra Pradesh, IN

Source

Journal of Biological Control, Vol 15, No 1 (2001), Pagination: 43-48

Abstract

In the greenhouse, the relative safety or thiamethoxam at 50, 25 and 12 ppm, imidacloprid at 50 ppm, fipronil at 100 ppm and check insecticide acephate at 1200 ppm along with untreated control to the brown mirid bug, Tytthus parviceps (Reuter) was assessed. The results revealed that thiamethoxam at 50 ppm and 25 ppm was as safe as imidacloprid 50 ppm, less safe than acephate 1200 ppm but more safe than fipronil 100 ppm.

Keywords

Insecticides, Nephotettix virescens, Nilaparvata lugens, Persistent Toxicity, Relative Safety, Rice, Sogatella furcifera, Tytthus parviceps.

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• Relative Safety of some New Insecticides to Microvelia douglasi atrolineata Bergroth, an Aquatic Predator of Hoppers in the Rice Ecosystem

Abstract Views :219  |  PDF Views:97

Authors

N. V. Krishnaiah ¹, V. Jhansi Lakshmi ¹, I. C. Pasalu ¹, T. Lingaiah ¹, K. Krishnaiah ¹

Affiliations
1 Department of Entomology, Directorate of Rice Research Rajendranagar, Hyderabad 500 030, Andhra Pradesh, IN

Source

Journal of Biological Control, Vol 15, No 1 (2001), Pagination: 49-52

Abstract

In a greenhouse experiment, the relative safety of thiaruethoxam at 50, 25 and 12 ppm, imidacloprid at 50 ppm, fipronil at 100 ppm, acephate at 1200 ppm along with untreated control was assessed to the aquatic veliid predator, Microvelia douglasi atrolineata Bergroth, which feeds on nymphs of brown planthopper, Nilaparvata lugens (Stal). The results revealed that fipronil 100 ppm was the safest treatment followed hy acephate at 1200 ppm and thiamethoxam at 12 ppm.

Keywords

Insecticides, Microvelia douglasi atrolineata, Nilaparvata lugens, Relative Safety, Rice.

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• Safety of Thiamethoxam to cyrtorhinus Lividipennis Reuter (Hemiptera: Miridae), a Predator of Brown Planthopper,Nilaparvata lugens (stal) in Rice

Abstract Views :221  |  PDF Views:104

Authors

V. Jhansi Lakshmi ¹, N. V. Krishnaiah ¹, I. C. Pasalu ¹, T. Lingaiah ¹, K. Krishnaiah ¹

Affiliations
1 Department of Entomology Directorate of Rice Research Rajendranagar, Hyderabad 500 030, Andhra Pradesh, IN

Source

Journal of Biological Control, Vol 15, No 1 (2001), Pagination: 53-58

Abstract

In greenhouse studies, thiamethoxam at 50, 25 and 12 ppm, imidacloprid at 50 ppm, fipronil at 100 ppm and the check insecticide acephate at 1200 ppm along with untreated control were assessed for their relative safety to nymphs and adults of green mirid bug Cyrtorhinus lividipennis Reuter, an effective predator of brown planthopper. For the adults of C.Hvidipennis, thiamethoxam at 25 ppm and 12 ppm was as safe as imidacloprid 50 ppm but less safer than acephate 1200 ppm. However, fipronil at 100 ppm and thiarnethoxam at 50 ppm were less safe. For the nymphs, thiamethoxam at 12 ppm was as safe as imidacloprid 50 ppm and fipronillOO ppm but less safer than acephate 1200 ppm. Thiamethoxam at 25 and 50 ppm was less safer than all other treatments.

Keywords

Cyrtorhinus lividipennis, Insecticides, Nilaparvata lugens, Rice, Safety.

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• Rice Leafhopper and Planthopper Honeydew as a Source of Host Searching Kairomone for the Mirid Bug Predator, Cyrtorhinus lividipennis (Reuter) (Hemiptera: Miridae)

Abstract Views :240  |  PDF Views:127

Authors

V. Jhansi Lakshmi ¹, K. Krishnaiah ¹, T. Lingaiah ¹, I. C. Pasalu ¹

Affiliations
1 Department of Entomology, Directorate of Rice Research Rajendranagar, Hyderabad 500030, Andhara Pradesh, IN

Source

Journal of Biological Control, Vol 14, No 2 (2000), Pagination: 7-13

Abstract

Kairornonal activity of honeydew of rice green leafhopper (GLH) Nephotettix virescence (Distant) and planthoppers viz,,brown planthoppcr (RPH) Nilaparvata lugens (Stal) and whitebacked planthopper (WBPH) Sogatella furcifera (Horv) on their mirid bug predator Cyrtorhinus lividipennis (Reuter) was studied in the laboratory. Honeydew of all the hoppers was found to be attractive to all stages of the mirid bugs both in the Petri-dish and olfactometer bioassays, Mirid bugs were attracted to the treated spot, moved (quickly on the untreated area, searched slowly on the treated spot making sharp turns and showed antennal palpation. When choice was given between BPH and WBPH honeydew, mirid bugs preferred to move towards BPH honeydew. When choice was given among RPH, WBPH and GLH honeydew, mirid bugs showed the highest response to GLH honeydew followed by that of BPH and WBPH. Mirid bug nymphs perceived and reached the honeydew source quickly compared to the females. In olfactometer studies, mirid bugs behaved similarly when released in groups and individually.

Keywords

Cyrtorhinus lividipennis, Honeydew, kairomone, Nephotettix virescens, Nilaparvata lugens, Sogatella furcifera.

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• Laboratory Evaluation of Commercial Neem Formulations Vis-a-Vis Insecticides against Egg Parasitoid, Trichogramma japonicum Ashmead (Hymonoptera:Trichogrammatidae)

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Authors

V. Jhansi Lakshmi ¹, G. Katti ¹, N. V. Krishnaiah ¹, T. Lingaiah ¹

Affiliations
1 Directorate of Rice Research, Rajendranagar, Hyderabad 500030, Andhra Pradesh, IN

Source

Journal of Biological Control, Vol 11, No 1&2 (1997), Pagination: 29-32

Abstract

Laboratory experiments were carried out to study the effect of neem formulations vis-a-vis insecticides on Trichogramma japonicum Ashmead, based on rate of parasitization and emergence of adults from parasitised eggs. The results revealed that Econeem and Neem Azal T/S (0.1-1.0 %) were safer compared to insecticides, particularly quinalphos and chlorpyriphos which had adverse effects on parasitization. Some neem formulations like Nimbecidine (0.25-4.0 %), Neemgold (2.0-4.0 %) and Rakshak (1.0%) also had adverse effects on parasitism.

Keywords

Egg Parasitoid, Insecticides, Neem Formulations, Trichogramma japonicum.

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