Krishnaiah, K.

• Role of Honeydew of Rice Hoppers as a Kairomone and Nutrient to the Predatory Mirid Bugs, Cyrtorhinus lividipennis Reuter and Tytthus parviceps (Reuter) (Hemiptera: Miridae)

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Authors

V. Jhansi Lakshmi ¹, I. C. Pasalu ¹, K. V. Rao ¹, K. Krishnaiah ¹

Affiliations
1 Rice Research (ICAR), Rajendranagar, Hyderabad, 500030, IN

Source

Journal of Biological Control, Vol 19, No 2 (2005), Pagination: 93-97

Abstract

Honeydew of brown planthopper (BPH), whitebacked planthopper (WBPH) and green leafhopper (GLH) of rice was evaluated for its role as an attractant and nutrient to their egg predators, Cyrtorhinus lividipennis Reuter and Tytthus parviceps (Reuter). The mirid bugs were attracted in more numbers to plants coated with honeydew than that of distilled water. The mirid bugs survived for 4-6 days on honeydew and 11-20 days on insect prey. It was found that honeydew attracts mirid bugs to the treated surface but it could not support the survival of mirid bugs for longer time.

Keywords

Cyrtorhinus lividipennis, Honeydew, Kairomone, Rice Hoppers, Tytthus parviceps.

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• Role of Rice Plant and its Extracts in Attracting Predatory Mirid Bugs, Cyrtorhinus Uvidipennis Reuter and Tytthus parviceps (Reuter) (Hemiptera: Miridae)

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Authors

V. Jhansi Lakshmi ¹, L. C. Pasalu ¹, K. Krishnaiah ¹

Affiliations
1 Directorate of Rice Research (lCAR) Rajendranagar, Hyderabad 500 030, Andhra Pradesh, IN

Source

Journal of Biological Control, Vol 20, No 2 (2006), Pagination: 175-181

Abstract

Healthy and hopper (BPH, WBPH and GLH) infested rice plants, different plant parts (leaf, stem and panicle) and rice plants of different ages (15, 40, 75 day old and harvesting stage plants) and their extracts were evaluated as the sources of synomones for attracting predatory mirid bugs viz., Cyrtorhinus lividipennis Reuter and Tytthus parviceps (Reuter) to the plant ecosystem. Rice plant and its extracts served as source of synomone for the mirid bugs, Mirid bugs exhibited preference towards hopper damaged rice plants and their extracts, Brown planthopper (BPH) damaged rice plants and extracts were more attractive to the mirid bugs than white backed planthopper (WBPH) and green leafhopper (GLH) damaged plants and their extracts. Among plants of different ages, 75 day old plants and their extracts were preferred by mirid bugs to 40 day old, 15 day old and harvesting stage plants and their extracts. Rice leaf extracts was more attractive to the mirid bugs compared to stem and panicle extracts. Rice plant plays an important role in attracting mirid bugs to the plant system and mird bugs were able to distinguish the insect damaged and undamaged plants and recognize plants of suitable age.

Keywords

Brown planthopper, Cyrtorhinus lividipennis, Green Leafhopper, Rice, Synomones, Tytthus parviceps, Whitebacked Planthopper.

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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

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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

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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

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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 :222  |  PDF Views:105

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)

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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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• Quantifying the Role of Natural Biological Control in Rice - A Case Study in a Farmer's Field

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Authors

G. Katti ¹, I. C. Pasalu ¹, K. Krishnaiah ¹

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

Source

Journal of Biological Control, Vol 14, No 2 (2000), Pagination: 15-21

Abstract

An On-farm trial was carried out to quantify the natural enemy incidence and its impact on pest incidence on BPT-5204 variety of rice in a farmer's field with and without insecticidal applications, during Kharif seasons of 1995 and 1996. The results revealed that need based protection involving single insecticidal application and schedule based protection involving three applications of insecticides were superior 10 natural biocontrol involving no insecticidal application throughout the crop season, in checking pest incidence. However, higher net returns can be obtained by resorting to need based application of insecticides which also results in maintenance of pest population at low levels and build up of natural enemy populations supporting natural control.

Keywords

Natural Biological Control, Rice.

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