Bio-efficacy of some novel insecticides against Nilaparvata lugens (Stål) (Hemiptera: Delphacidae) on paddy (original) (raw)
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International Journal of Tropical Insect Science, 2020
The experiment was based on the management of Brown plant hopper, important pest of rice. All the given treatment was applied on this pest. The data observed after 3, 7 and days after spray. The observations revealed that all the treatments were found significantly superior over untreated control, Imidacloprid 17.8 SC @ 200 ml/ha were found most effective in comparison to all other treatments. The next effective treatment was Fipronil 5 SC @ 1000 ml/ha followed by Thiamethoxam 25 WG @ 100 g/ha. and in bio-pesticides Metarhizium anisopliae 4.7 × 10 8 c.f.u./gm @ 2.5 kg/ha.gave the best result among all bio-pesticides. The plot treated by Imidacloprid provide the best Cost benefit ratio
A field trail was conducted at Agricultural College Farm, Bapatla during kharif 2015 to evaluate the efficacy of imidacloprid 17.8 SL, thiamethoxam 25 WG, acetamiprid 20 SP, sulfoxaflor 25 SC, dinotefuran 20 SG, pymetrozine 50 WG, buprofezin 25 SC, monocrotophos + dichlorvos 36 SL + 76 EC against brown planthopper in rice ecosystem. The data on planthoppers inferred that pymetrozine 50 WG @ 0.5 g l-1 proved to be the most effective insecticide in reducing population by recording highest per cent population reduction (62.98%) over untreated control. The insecticide dinotefuran 20 SG @ 0.4 g l-1 (59.60 %) was on par with pymetrozine in suppressing the pest population and also these three chemicals recorded with the highest grain yields 5266 and 5228 kg ha-1.
Effectiveness of biopesticides against brown planthopper ( Nilaparvata lugens ) in paddy cultivation
Sustainable Chemistry and Pharmacy, 2018
The brown planthopper (BPH) causes serious damage to rice by sucking rice sap, ovipositing in rice tissues, and transmitting a number of rice diseases during its long-distance migration that severely affect the productivity of paddy. Thus, the aim of this study is to investigate the effectiveness of biopesticides against BPH population. BV500WS is used at the early stage of paddy cultivation for growth enhancement meanwhile BV612EC is used a week after the liberation of BPH for crop protection. Three conditions were adopted as follows which are T1 where the paddy was sprayed using BV500WS and BV612EC to study the effectiveness of both types of biopesticides, T2 where the paddy was sprayed using BV500WS only and C1 where the paddy was cultivated without any pesticide application as control. BPH was released twice on day 46 and 59 of paddy cultivation. Reduction of BPH population with up to 100% mortality rate was observed with the application of two types of biopesticides at T1 resulting in the highest number of remaining tillers with 68.56%. Although severely affected by BPH, T2 was able to has comparable number of remaining tillers as C1 which was 46.24% and 49.65% respectively. These results showed that two types of biopesticides were more effective in reducing BPH compared to one type of biopesticide.
A field trail was conducted at Agricultural College Farm, Bapatla during kharif 2015 to evaluate the efficacy of imidacloprid 17.8 SL, thiamethoxam 25 WG, acetamiprid 20 SP, sulfoxaflor 25 SC, dinotefuran 20 SG, pymetrozine 50 WG, buprofezin 25 SC, monocrotophos + dichlorvos 36 SL + 76 EC against brown planthopper in rice ecosystem. The data on planthoppers inferred that pymetrozine 50 WG @ 0.5 g l -1 proved to be the most effective insecticide in reducing population by recording highest per cent population reduction (62.98%) over untreated control. The insecticide dinotefuran 20 SG @ 0.4 g l -1 (59.60 %) was on par with pymetrozine in suppressing the pest population and also these three chemicals recorded with the highest grain yields 5266 and 5228 kg ha -1 .
Indian journal of entomology, 2022
Efficacy of a new combination insecticide against rice brown plant hopper (BPH) Nilaparvata lugens Stal revealed that among all the treatments, significant reduction in the incidence (76.91% reduction over control) and higher grain yield (5.37 ton/ ha) was obtained with buprofezin 24%+ fipronil 40%SC (MAIRM-10) @ 875 ml/ ha. It was at par with buprofezin 24%+ fipronil 40%SC (MAIRM-10) @ 750 ml/ ha followed by buprofezin 25%SC @ 800 ml/ ha. Although maximum grain yield was obtained from buprofezin 24%+ fipronil 40%SC (MAIRM-10) @ 875 ml/ ha, maximum cost benefit in term of ICBR was observed with buprofezin 24%+ fipronil 40%SC (MAIRM-10) @ 750 ml/ ha (1:6.11) besides considering the environmental effect. Buprofezin 24%+ fipronil 40%SC (MAIRM-10) @ 750 ml/ ha was found to be most optimum one for BPH management.
Efficacy of a New Combination Insecticide Against Rice Brown Planthopper Nilaparvata Lugens (Stal)
Indian Journal of Entomology
Efficacy of a new combination insecticide against rice brown plant hopper (BPH) Nilaparvata lugens Stal revealed that among all the treatments, significant reduction in the incidence (76.91% reduction over control) and higher grain yield (5.37 ton/ ha) was obtained with buprofezin 24%+ fipronil 40%SC (MAIRM-10) @ 875 ml/ ha. It was at par with buprofezin 24%+ fipronil 40%SC (MAIRM-10) @ 750 ml/ ha followed by buprofezin 25%SC @ 800 ml/ ha. Although maximum grain yield was obtained from buprofezin 24%+ fipronil 40%SC (MAIRM-10) @ 875 ml/ ha, maximum cost benefit in term of ICBR was observed with buprofezin 24%+ fipronil 40%SC (MAIRM-10) @ 750 ml/ ha (1:6.11) besides considering the environmental effect. Buprofezin 24%+ fipronil 40%SC (MAIRM-10) @ 750 ml/ ha was found to be most optimum one for BPH management.
Crop Protection, 2008
The parasitoid, Anagrus nilaparvatae (Pang et Wang), is a major natural enemy of the rice planthopper Nilaparvata lugens. It plays an important role in the integrated pest management (IPM) of the rice planthopper, although chemical control is also effective. However, compatibility of biological and chemical control has never been investigated with this system. This study was designed to assess potential insecticide toxicities to the wasps, including acute and residual toxicity through contact and oral ingestion. Fourteen insecticides, including organophosphates, carbamates, pyrethroids, insect growth regulators (IGRs), neonicotine, phenylpyrazole, and antibiotics were selected to test their toxicities against the adult parasitoid. Median lethal concentration (LC 50 ) of each insecticide was first determined. Acute contact toxicity tests indicated that chlorpyrifos had the highest toxicity to the wasp, requiring the least chemical to achieve 50% mortality. Imidacloprid was the second most toxic insecticide, while IGRs had the lowest toxicity. Results of oral toxicity tests of 14 pesticides showed that dichlorvos was the most toxic, which generated 100% mortality only 2 h after treatment. Isoprocarb, imidacloprid, and thiamethoxam were the second most toxic insecticides and killed all wasps in a 4-h period. Residual toxicity results indicated that imidacloprid was the most persistent insecticide, and it retained residual toxicity (80.7% mortality) on rice leaves up to 7 d after treatment. Thiamethoxam, triazophos, and fipronil also had long residual toxicity to the wasps with 7-d mortalities as 66.8%, 54.6%, and 50.0%, respectively. IGRs showed very low contact and residual toxicity, but exhibited certain chronic effects of oral toxicity on longevity, fecundity, and offspring emergence. r
2017
Studies were carried to evaluate the influence of plant nutrients @ 50:30:20kg/ha (50% recommended NPK level), 100:60:40kg/ ha (100% recommended NPK level) and 150:90:60kg/ha (150% recommended NPK level) on insecticide toxicity at 24hrs, 48hrs, 72hrs and 96hrs after spray against brown plant hopper, Nilaparvata lugens (Stal) in kharif 2015 and 2016. Results showed that Fipronil 5%SC recorded the 94.17, 83.33 and 75.83 per cent BPH mortality at 50%NPK, 100%NPK and 150%NPK level, respectively in kharif 2015 and; 95.00, 87.50 and 75.83 per cent BPH mortality in kharif 2016 followed by Imidacloprid 17.8%SL recorded 91.67, 86.67 and 72.50 per cent mortality in kharif 2015; 91.67, 85.00 and 73.33 in kharif 2016. Acephate 75% SP recorded 70.83, 66.67 per cent BPH mortality in kharif 2015 and; 70.00, 67.50 and 58.33 per cent BPH mortality in kharif 2016 at 50% NPK, 100% NPK and 150% NPK level, respectively. Among the tested insecticides Fipronil 5%SC and Imidacloprid 17.8% SL highly influen...
Agrotrop: Journal on Agriculture Science, 2016
Evaluation of ovicidal and nymphcidal properties of buprofezin 100 g/linsecticide to eggs and nymphs of brown planthopper, Nilaparvata lugens(Stal.) (Hemiptera: Delphacidae). Research was carried out in screen house ofSukamandi, Indonesian Center for Rice Research (ICRR) in the wet season of 2013. Theresearch used randomized block design with 5 doses levels insecticide treatment of buprofezin100 g/l and four replications. The buprofezin treatments were 250, 500, 750, 1000, and 1500ml/ha compared with control without insecticide. The objective of the research to evaluate ofovicidal and nymphcidal of buprofezin to brown planthopper (BPH). The results showed thatthe ovicidal properties of buprofezin 100 g/l with a range doses of treatments to BPH eggsthat application at 5 days after inoculation with eggs remains in the plant tissue were 39,79-94,88%. The raising ovicidal of buprofezin were 74,84-99,5% that applied at 9 days afterinoculation with eggs remains in the plant tissue. In the...
Journal of Tropical Plant Protection, 2021
Rice (Oryza sativa) is the primary food crop in the world. The use of natural pesticides made from essential plants has begun to be developed because it is useful in controlling some plant pests. This study aimed to investigate lemongrass oil's effectiveness in controlling brown planthopper pests in rice plants. This study consist of five concentrations using lemongrass oil and sterile distilled water as control was repeated three times. The highest mortality of brown planthopper was found at 1.6% concentration (100%), while the lowest mortality was 0.1% concentration (26.66%). The lemongrass oil can be used to control brown planthoppers because of the LC50 value at a concentration of 8233.34 ppm (0.8%) and LT50 at 6 HAT.