https://cststudy.blogspot.com : Rice pest. Q.17 ‘White ear’ in rice is due to____ attack?
Rice Crop Pests and Their Management Theory & MCQs, January Month Agriculture Current Affairs 2020. Baton Rouge, LA 70803 Scientific Name. During reproductive stage, it affects the panicle development and causes chaffy grains (white ears). The melon thrips, Thrips palmi Karny, is a major pest of vegetables and some other important crops. Rolled leaves are also symptoms of drought. Damage symtoms– Both nymphs and adults suck the sap from individual grains at milky stage.
Recognition and Diagnosis: Immature. Adults have white fore wings with pale brown bands forming the shape of W. Q.1 Terminal rolling and drying of leaves from tip to base in both rice nursery and mainfield. They migrate during the day and look for newly planted rice fields and other hosts. They fly only weakly and their feathery wings are unsuitable for conventional flight; instead, thrips exploit an unusual mechanism, clap and fling, to create lift using an unsteady circulation pattern w… melon thrips; Other Scientific Names. Rice Crop Pests and Their Management.
In direct-seeded rice fields in Malaysia, losses can reach 100% when infestation is severe in the first 20 days, after sowing. Other scientific names. Damage symptoms– Both nymphs and adults suck plant sap and cause tip drying and orange discoloration of both margins of leaves. Flood to submerge the infested field for two days. The LSU AgCenter and the LSU College of Agriculture, 101 Efferson Hall These Thrips are responsible for the total cowpea yield loss in … Circular patches of drying and lodging of matured plants are typical symptoms. Adults are white in colour, They are the biggest of rice hoppers, Zoological Name:- Empoascanara maculifrons, Damage symptoms- Nymphs and adults suck the sap of the leaves and cause “hopper burn” in the seedlings in the form of whitish waxy lines on the leaf blades in the initial stage of attack and subsequent drying. The adult thrips are day-flying. Q.24 Alternat host of Melanitis ismene is?
Feeding damage caused by thrips causes leaf curling and discoloration.
eggs bare or covered with hairs, laid in masses, neonate larvae suspend themselves from leaves by silken threads and blown to other plants to feed, mature larvae bore into the sheath and tiller of the plant, 2.causes deadheart or drying of the central tiller during the vegetative stage, 3.causes whiteheads at reproductive stage, Scraping of the upper surface of the leaf blade leaving only the lower epidermis as white streaks parallel to the midrib, Tunneling of larvae through leaf tissue causes irregular translucent white patches that are parallel to the leaf veins, Damaged leaves turn whitish and membranous, Rice field appears burnt when severely infested, 1.Leaves damaged have silvery streaks or yellowish patches 225-578-4161
Damage symptoms- The nymphs and adults suck the sap from the stem and cause stunting and yellowing of tillers. (adsbygoogle = window.adsbygoogle || []).push({}); Zoological Name:- Stenchaetothrips biformis. Damage symptoms– The maggot feeds at the base of the growing shoot causing formation of a tube like gall similar to “onion needle” or “silver-shoot”. Damage symptoms– The nymphs and adults by chewing and cutting various plant portion. Earhead stink bug/Shield bug/Red spotted bug: Menida histrio. How to manage. Thrips can colonizes crops from sea level up to 2000 meters above sea level. Q.16 Paddy stem borer belongs to ____ family? Larvae mature to the adult stage. Scientific Name: Thrips tabaci (Lindeman) (Thysanoptera: Thripidae) Geographic Distribution: World wide. The second part, or the specific name, identifies the exact species to which the organism falls under, within the genus. Please see the Rice section of the Insect Pest Management Guide on the LSU AgCenter's Management Guides webpage. Stem feeder/ Internal feeder. Neonate larvae feed on the soft tissues of unopened young leaves. How you can manage thrips: Four practices to discourage thrips populations and damage: 1. flushing or flooding, which drowns the insects and forces them to move up the plant, where they are more vulnerable to natural control; 2. controlling weeds, which prevents thrips from building up on alternate hosts; 3. establishing a healthy, uniform stand of rice; 4. reducing early-season stress caused by inadequate soil moisture, high winds, herbicide injury, nutrient imbalances and damage from other pest insects and diseases (Texas Rice Production Guidelines, 2012). Feeding damage caused by thrips causes leaf curling and discoloration. Why and where it occurs.
The company has most qualified technicians under NPMA.
Rice is the main stable food in Bangladesh.Rice insect pest is one of the main causes of low yield in Bangladesh.There are 175 insect pest has been identified ,among them 23 species are major.Yield loss due to rice pest. Rice thrips are more serious pests during the dry season. Affected grains become chaffy with black spots at the site of feeding puncture. Both larvae and adults feed on young rice plants. Q.5 Which of the following is white leaf hopper? Required fields are marked *. Caterpillar stage of these insect is very destructive. Damage symptoms- Both Nymphs & Adults lacerate the tender leaves & suck the plant sap, causing yellow or silvery streaks on the leaves of young seedlings.
Presence of white waxy fluff in leaf sheath is a typical symptom of damage.
In the tropics, the rice thrips becomes abundant in dry periods from July to September and January to March. It causes damage both in nursery and main field.
Thrips (Order Thysanoptera) are found worldwide and include almost 6000 species. It also sucks the sap from leaf sheath, leaf and panicle. Under certain conditions, they can build up quickly and suddenly cause crop injury on rice seedlings. Q.26 Which of the following pest causes onion needle or silver shoot symptoms in rice? Damage symptoms– Both nymphs and adults suck plant sap from the culm during tillering to flowering at the base of the plant. In Louisiana, the number of thrips in rice field is usually below levels justifying treatment, but they may increase rapidly under favorable conditions and yield losses can occur.
Your email address will not be published. 2.Translucent epidermis becomes visible on damaged area, 3.Leaves curled from the margin to the middle, 4.Leaf tips wither off when severely infested, Formation of a hollow cavity or tubular gall at the base of the infested tiller, Gall is a silvery white hollow tube, 1 cm wide and 10-30 cm long, Affected tiller inhibits growth of leaves and fails to produce panicles, Elongation of leaf sheaths called onion leaf or silvershoot, Damaged spots or chakdhora or soorai disease, Leaves cut at right angles as with a pair of scissors, Leaves with papery upper epidermis that were fed on, Skeletonized leaf tissues usually appear ladder-like. Q.29 Cutting of seedling tip before transplanting is a good management technique for controlling?
Rice is the main stable food in Bangladesh.Rice insect pest is one of the main causes of low yield in Bangladesh.There are 175 insect pest has been identified ,among them 23 species are major.Yield loss due to rice pest. In the tropics, the rice thrips becomes abundant in dry periods from July to September and January to March. A leading pest control company in Pakistan and the UK. Q.12 Zigzag striped leafhopper belongs to____ family? Periods of dry weather favor the development of the rice thrips.
Rolled leaves are also symptoms of drought. Haplothrips aculeatus (Fabricius) Preferred Common Name. Facts: It is important to scout early and often for thrips. Q.10 —-act as a vector ragged stunt and wilted stunt? Damage symptoms- Adults feed on chlorophyll by scraping and cause white patches along the long axis of leaf. Q.31 Judicious application of fertilizer is done to minimize—- damage in rice?
Q.7 Hopper burn’ is the symptom of____ pest in rice? Q.15 Rice earhead bug belongs to ___ family? Terminal rolling and drying of leaves from tip to base is the typical symptom of attack.
Rice Crop Pests and Their Management Theory & MCQs, January Month Agriculture Current Affairs 2020. Baton Rouge, LA 70803 Scientific Name. During reproductive stage, it affects the panicle development and causes chaffy grains (white ears). The melon thrips, Thrips palmi Karny, is a major pest of vegetables and some other important crops. Rolled leaves are also symptoms of drought. Damage symtoms– Both nymphs and adults suck the sap from individual grains at milky stage.
Recognition and Diagnosis: Immature. Adults have white fore wings with pale brown bands forming the shape of W. Q.1 Terminal rolling and drying of leaves from tip to base in both rice nursery and mainfield. They migrate during the day and look for newly planted rice fields and other hosts. They fly only weakly and their feathery wings are unsuitable for conventional flight; instead, thrips exploit an unusual mechanism, clap and fling, to create lift using an unsteady circulation pattern w… melon thrips; Other Scientific Names. Rice Crop Pests and Their Management.
In direct-seeded rice fields in Malaysia, losses can reach 100% when infestation is severe in the first 20 days, after sowing. Other scientific names. Damage symptoms– Both nymphs and adults suck plant sap and cause tip drying and orange discoloration of both margins of leaves. Flood to submerge the infested field for two days. The LSU AgCenter and the LSU College of Agriculture, 101 Efferson Hall These Thrips are responsible for the total cowpea yield loss in … Circular patches of drying and lodging of matured plants are typical symptoms. Adults are white in colour, They are the biggest of rice hoppers, Zoological Name:- Empoascanara maculifrons, Damage symptoms- Nymphs and adults suck the sap of the leaves and cause “hopper burn” in the seedlings in the form of whitish waxy lines on the leaf blades in the initial stage of attack and subsequent drying. The adult thrips are day-flying. Q.24 Alternat host of Melanitis ismene is?
Feeding damage caused by thrips causes leaf curling and discoloration.
eggs bare or covered with hairs, laid in masses, neonate larvae suspend themselves from leaves by silken threads and blown to other plants to feed, mature larvae bore into the sheath and tiller of the plant, 2.causes deadheart or drying of the central tiller during the vegetative stage, 3.causes whiteheads at reproductive stage, Scraping of the upper surface of the leaf blade leaving only the lower epidermis as white streaks parallel to the midrib, Tunneling of larvae through leaf tissue causes irregular translucent white patches that are parallel to the leaf veins, Damaged leaves turn whitish and membranous, Rice field appears burnt when severely infested, 1.Leaves damaged have silvery streaks or yellowish patches 225-578-4161
Damage symptoms- The nymphs and adults suck the sap from the stem and cause stunting and yellowing of tillers. (adsbygoogle = window.adsbygoogle || []).push({}); Zoological Name:- Stenchaetothrips biformis. Damage symptoms– The maggot feeds at the base of the growing shoot causing formation of a tube like gall similar to “onion needle” or “silver-shoot”. Damage symptoms– The nymphs and adults by chewing and cutting various plant portion. Earhead stink bug/Shield bug/Red spotted bug: Menida histrio. How to manage. Thrips can colonizes crops from sea level up to 2000 meters above sea level. Q.16 Paddy stem borer belongs to ____ family? Larvae mature to the adult stage. Scientific Name: Thrips tabaci (Lindeman) (Thysanoptera: Thripidae) Geographic Distribution: World wide. The second part, or the specific name, identifies the exact species to which the organism falls under, within the genus. Please see the Rice section of the Insect Pest Management Guide on the LSU AgCenter's Management Guides webpage. Stem feeder/ Internal feeder. Neonate larvae feed on the soft tissues of unopened young leaves. How you can manage thrips: Four practices to discourage thrips populations and damage: 1. flushing or flooding, which drowns the insects and forces them to move up the plant, where they are more vulnerable to natural control; 2. controlling weeds, which prevents thrips from building up on alternate hosts; 3. establishing a healthy, uniform stand of rice; 4. reducing early-season stress caused by inadequate soil moisture, high winds, herbicide injury, nutrient imbalances and damage from other pest insects and diseases (Texas Rice Production Guidelines, 2012). Feeding damage caused by thrips causes leaf curling and discoloration. Why and where it occurs.
The company has most qualified technicians under NPMA.
Rice is the main stable food in Bangladesh.Rice insect pest is one of the main causes of low yield in Bangladesh.There are 175 insect pest has been identified ,among them 23 species are major.Yield loss due to rice pest. Rice thrips are more serious pests during the dry season. Affected grains become chaffy with black spots at the site of feeding puncture. Both larvae and adults feed on young rice plants. Q.5 Which of the following is white leaf hopper? Required fields are marked *. Caterpillar stage of these insect is very destructive. Damage symptoms- Both Nymphs & Adults lacerate the tender leaves & suck the plant sap, causing yellow or silvery streaks on the leaves of young seedlings.
Presence of white waxy fluff in leaf sheath is a typical symptom of damage.
In the tropics, the rice thrips becomes abundant in dry periods from July to September and January to March. It causes damage both in nursery and main field.
Thrips (Order Thysanoptera) are found worldwide and include almost 6000 species. It also sucks the sap from leaf sheath, leaf and panicle. Under certain conditions, they can build up quickly and suddenly cause crop injury on rice seedlings. Q.26 Which of the following pest causes onion needle or silver shoot symptoms in rice? Damage symptoms– Both nymphs and adults suck plant sap from the culm during tillering to flowering at the base of the plant. In Louisiana, the number of thrips in rice field is usually below levels justifying treatment, but they may increase rapidly under favorable conditions and yield losses can occur.
Your email address will not be published. 2.Translucent epidermis becomes visible on damaged area, 3.Leaves curled from the margin to the middle, 4.Leaf tips wither off when severely infested, Formation of a hollow cavity or tubular gall at the base of the infested tiller, Gall is a silvery white hollow tube, 1 cm wide and 10-30 cm long, Affected tiller inhibits growth of leaves and fails to produce panicles, Elongation of leaf sheaths called onion leaf or silvershoot, Damaged spots or chakdhora or soorai disease, Leaves cut at right angles as with a pair of scissors, Leaves with papery upper epidermis that were fed on, Skeletonized leaf tissues usually appear ladder-like. Q.29 Cutting of seedling tip before transplanting is a good management technique for controlling?
Rice is the main stable food in Bangladesh.Rice insect pest is one of the main causes of low yield in Bangladesh.There are 175 insect pest has been identified ,among them 23 species are major.Yield loss due to rice pest. In the tropics, the rice thrips becomes abundant in dry periods from July to September and January to March. A leading pest control company in Pakistan and the UK. Q.12 Zigzag striped leafhopper belongs to____ family? Periods of dry weather favor the development of the rice thrips.
Rolled leaves are also symptoms of drought. Haplothrips aculeatus (Fabricius) Preferred Common Name. Facts: It is important to scout early and often for thrips. Q.10 —-act as a vector ragged stunt and wilted stunt? Damage symptoms- Adults feed on chlorophyll by scraping and cause white patches along the long axis of leaf. Q.31 Judicious application of fertilizer is done to minimize—- damage in rice?
Q.7 Hopper burn’ is the symptom of____ pest in rice? Q.15 Rice earhead bug belongs to ___ family? Terminal rolling and drying of leaves from tip to base is the typical symptom of attack.