Different pests of rice in field..
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Study on insects pests of kharif rice field, different description on pest of rice & their management.
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Monday 3: Comparative studies on sources of sweetpotato planting material for...
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Abstract
Pathogen-tested sweetpotato planting material is shown to provide a significant boost in yield and quality in the sweetpotato seed systems and value chains. In the absence of pathogen-tested planting material, negative selection has been shown to be effective in some cultivars and locations as well. Protective net tunnels allow decentralised vine multipliers to maintain and multiply limited quantities of clean planting material. Commercial demand for sweetpotato planting material is likely to be sustained if seed producers are able to provide evidence of the superiority of their product to their customers. The objective of this study was to evaluate the effects of net tunnel source and of pathogen-tested planting material on yield and health status (sweetpotato virus disease [SPVD] and weevil incidence) of crop. Studies were conducted in 2015, at locations in Ghana that varied with regard to SPVD and weevil pressure. Four varieties were used with pathogen-tested planting materials—‘Apomuden’, ‘Dadanyuie’, ‘Bohye’, and ‘Ligri’—and multiplied in net tunnels. ‘Apparently’ healthy (field-derived, negatively selected) material of the same varieties were also multiplied in adjacent field plots at one location in northern Ghana. For ‘Apomuden’, the apparently healthy planting material was multiplied in both net tunnel and open field at the same location. The trials were conducted at three sites in northern Ghana: Nyankpala, Navrongo, and Wa. At each site, 8 treatment combinations (4 varieties and 2 sources of planting material) were arranged in a trial design with three replicates. The 4 x 5.1 m plots were planted to 17 vine cuttings per row, spacing 0.30 m within rows and 1 m between rows, and no additional irrigation. Weeding, reshaping, and vine lifting were done at all locations. NPK (15:15:15) was applied at Navrongo and Wa, 4 weeks after planting, as recommended, due to natural poor soil fertility. Data were analysed using Genstat (12th edition). There were highly significant differences among varieties and trial sites for plant establishment, foliage yield, root yield, weevil damage, and SPVD rating; but source of planting material was not found to be significant. For SPVD, net tunnel source is better than open field (p<0.01).><0.04). The results indicate that apparently healthy planting material was as effective as pathogen-tested planting material. Net tunnels may have a distinct advantage for maintaining and multiplying planting material to produce healthy sweetpotato crops.
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11.effect of plant extracts on post flowering insect pests and grain yield of...
1) A field study was conducted in Nigeria to evaluate the effects of plant extracts from Balanites aegyptiaca, Momordica balsamina, and Vernonia amygdalina on cowpea insect pests and yield.
2) The results showed that Balanites and Momordica extracts significantly reduced several major cowpea insect pests and increased cowpea pod and seed weights compared to the untreated control.
3) Cypermethrin insecticide provided the best pest control and highest cowpea yields, but Balanites and Momordica extracts showed potential as alternative organic pest management options for farmers.
11.[46 51]effect of plant extracts on post flowering insect pests and grain y...
1) A field study was conducted in Nigeria to evaluate the effects of plant extracts from Balanites aegyptiaca, Momordica balsamina, and Vernonia amygdalina on cowpea insect pests and yield.
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Ipm vegetables v.sridhar-2018
This document provides information on integrated pest management for vegetable crops. It describes the major types of insect pests that damage vegetables, including borers that damage fruits, leaves, flowers, shoots, and roots. It also discusses sucking pests like aphids and whiteflies. The document then focuses on management strategies for key pests in important vegetable crops like tomato, brinjal, cucurbits and beans. It emphasizes the use of cultural, biological and mechanical controls as well as selective use of pesticides within an IPM framework.
Ipm vegetables v.sridhar-2018
This document provides information on integrated pest management for vegetable crops. It describes the major types of insect pests that damage vegetables, including borers that damage fruits, leaves, flowers, shoots, and roots. It also discusses sucking pests like aphids and whiteflies. The document then focuses on management strategies for key pests in important vegetable crops like tomato, brinjal, cucurbits and beans. It emphasizes the use of cultural, biological and mechanical controls, along with selective use of pesticides. For key pests like tomato fruit borer and brinjal shoot borer, it provides specific IPM packages involving cultural practices, pheromone trap use, biopesticide sprays and other
Organic Vegetable Pest Management Updates 2013
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This presentation was delivered at the Georgia Organics Annual Conference in Atlanta on February 23, 2013. Provides basic information on IPM approaches in sustainable vegetable production systems.Entomological study ppt rawe
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Different pests of rice in field..
- 1. Study On Insect pests Of Kharif Rice Field
- 2. Steps Of Survey On Rice field Collection of Observatory lance , Arial net , Field book , Rice pests manual. Selection of rice plants (excluding the border line) Pests are counted per hill. Along with natural enemies are also counted. All Observed data are recorded in Field book. Samples collected for further observation.
- 3. Date of survey- 18th Sept,2015 Stage of the crop -vegetative stage, Place:- Jaguli Instructional FarmArial net Lance
- 5. Insect pests of Rice Natural Enemies Plant No. No.Of Hill BPH WBPH Gundhi bug Grass Hopper Spider Coccinelid Beetle 01. 1 9 24 1 1 0 1 02. 2 3 16 3 0 1 0 03. 3 8 17 4 1 0 0 04. 4 4 10 5 0 1 1 grub 05. 5 3 16 0 1 0 0 TOTAL 27 83 13 3 2 2 Avg. 5.4 16.6 2.6 0.6 0.4 0.4
- 6. Bar Diagram Of Collected Insect Pests data WBPH BPH Gundhi Bug Grass Hopper Spider Cocci. Beetle 0 2 4 6 8 10 12 14 16 18 Natural Enemies
- 7. CONCLUSION From the above data we can decide that i. ETL level of White backed plant hopper is much more than its normal threshold level (10 insects per hill). ii. Along with that the population of brown plant hopper is also more than its ETL level (5-10 insects per hill). iii. The pest population of gundhi bug is also above ETL (Normally it is 1-2 bugs/hill). Otherwise ,Grasshopper population is so low,the management is not required.
- 8. Symptom of damage: Suck the sap and cause stunted growth “Hopper burn” is caused in irregular patches Ovipositional marks exposing the plant to fungal and bacterial infections Ragged stunt or grassy stunt virus disease plant may be observed White backed plant hopper: Sogatella furcifera
- 9. Management Measures of WBPH IPM Stratiges: Cultivation of resistent varities, Recommended dose of N, Avoid closer planting, Apply any one of the following insecticides to control WBPH: Dichlorvos 76%SC(Nuvan) @ 470 ml/ha Azadirachtin 0.03%EC @ 1000 ml/ha Quinalphos 25 EC(Ekalux) @ 1500 ml/ha
- 10. Damage symptom of BPH: Insert eggs into midrib of leaf sheath. They suck sap from the Phloem of stem. “HOPPER BURN”(Drying of leaves) caused by this pest. Spread “Rice Grassy Stunt Virus”. Brown Plant Hopper(Nilaparvata lugens)
- 11. Management of BPH IPM Strategies : Avoid closer planting, Cultivation of resistant varieties (IR 36,IR 60), Recommended dose of N, Some natural enemies:- Cyrtorhinous lividipennis ( Mirid bug) Lycosa psudoannulata (Wolf Spider) Chemical management: Confidor ( Imidacloprid 17.8%SL) @ 50ml/acre Actara ( Thiamethoxam 25%WG) 40g/acre
- 12. Symptoms of Damage Leptocorisa acuta Adults & nymphs suck the sap at the milky stage. Lays the eggs on the leaf blade in rows. Infested earheads become chaffy. Pungent smell emits from the field. Rice Gundhi Bug
- 13. Management Collection of L. acuta Use of light traps. Collection of and destruction of pest. Resistant Variety:Badshabhog Destruction the weed host. Apply Carbaryl 50WP(Sevin) or, Malathion 50EC @675 ml/ha. Management Of Gundhi Bug