(Althaea hirsuta)

Description

Resources

34 resources available. Click on the image to preview, click on the publisher link to download.

Panicle rice mites

20157800702.jpg

FACTSHEETS FOR FARMERS www.plantwise.org Created in Vietnam , June 2013 Panicle Rice Mites Recognize the problem The panicle rice mite (PRM) feeds on rice from seedling to grain maturity. PRM infests panicles, leaf veins and leaf sheaths (and so is also sometimes known as rice sheath mite). Feeding takes place behind the leaf sheath. The feeding lesion can be detected by purple-brown discoloration of the leaf sheath. When a new leaf begins development, a female will move to the new leaf sheath, produce male offspring and then establish a new...

Published at: plantwise.org

Management of birds in rice fields

20147800117.jpg

FACTSHEETS FOR FARMERS www.plantwise.org Created in Sierra Leone , September 2013 Management of birds in rice fields Recognize the problem In Sierra Leone, birds, especially the weaver birds and sparrows, are recognised as troublesome animals that cause serious damage to rice plants. Birds damage rice from the time of planting the seeds in the field to maturation. The entire crop field can be spoilt if the population of birds grows. Background Birds belong to the class of animals with backbones. The birds that feed on crops in Sierra Leone are...

Published at: plantwise.org

Short rice varieties against stalk-eyed shoot fly

20147801015.jpg

FACTSHEETS FOR FARMERS www.plantwise.org Created in Tanzania , September 2013 Short rice varieties against stalk-eyed shoot fly Recognize the problem Stalk-eyed shoot flies, also called stalk-eyed borers or Nzi wa virungu in Kiswahili, are small (less than 1 cm) brown insects. Their eyes are found on two long stalks coming out from their head. The larvae of the flies feed inside the leaves of seedlings and young rice plants. The damaged leaves become dry and die. This reduces the grain production. Background Stalk-eyed shoot flies attack...

Published at: plantwise.org

Resistant rice against rice yellow mottle virus

20147801019.jpg

FACTSHEETS FOR FARMERS www.plantwise.org Created in Tanzania , September 2013 Resistant rice against rice yellow mottle virus Recognize the problem Rice yellow mottle virus is a disease of rice. Affected plants have yellow or orange leaves at the early stage of the crop. In severe cases, leaves roll up and dry. Other symptoms are stunting, reduced tillering and poor panicle filling. This results in low or no seed production and poor grain quality. Crop losses can be 25-100%. Background Rice yellow mottle virus disease is transmitted either...

Published at: plantwise.org

Management of bacterial leaf blight of rice

20147801451.jpg

FACTSHEETS FOR FARMERS www.plantwise.org Created in Nepal , September 2013 Management of bacterial leaf blight of rice Recognize the problem Bacterial blight is one of the most serious diseases of rice in the Terai region of Nepal. However, it may also affect rice crops in the valley and mid hills. Wilting of seedlings in early stage (kresek) and foliar blight can cause yield losses of 80-85% and 30% respectively. Yellowish water-soaked stripe shaped lesions appear on leaf blades or at the leaf tips. Later, these lesions increase in...

Published at: plantwise.org

Management or rice leaf folder

20147801456.jpg

FACTSHEETS FOR FARMERS www.plantwise.org Created in Nepal , September 2013 Management of rice leaf folder Recognize the problem The adult rice leaf folder is a yellow-brown moth. Leaf folder caterpillars fold the rice leaves around themselves and attach to the leaf margins. Each female lays around 300 eggs at night, during a lifecycle of 3 to 10 days. Larvae are yellow and about 12 - 25 mm long. As they mature, they turn yellowish green with brown heads. Each larva can make two to four folded leaves. The pupa is about 9-12 mm long and is found...

Published at: plantwise.org

Integrated rodent management in rice field

20157800096.jpg

FACTSHEETS FOR FARMERS www.plantwise.org Created in Sri Lanka , October 2013 Integrated Rodent Management in rice field Recognize the problem Rice field rats are becoming an important pest due to the damage they cause to rice plants and because they act as a vector for Leptospirosis disease. More than 63% of Leptospirosis cases are rice farmers. In rural rice fields, rat damage can reach up to 30% loss. Background Due to the very high breading rate of rats, natural biological control is not very successful. Total dependency on...

Published at: plantwise.org

Helminthosporiosis in rice

20137804449.jpg

FACTSHEETS FOR FARMERS www.plantwise.org Created in Bolivia , July 2012 Helminthosporiosis in rice Recognize the problem This is one of the most important diseases affecting rice. It can attack in any stage of development, but the damage is worse at the end of the cycle because it drastically decreases the yield and the quality. It looks like coal. Small oval brown spots with a grey center appear on the leaves. Strong attacks can make leaves dry. Dark coffee-colored spots appear in the panicle and severe attacks cause spots in the grain and loss...

Published at: plantwise.org

Brown plant hopper of rice

20137804473.jpg

FACTSHEETS FOR FARMERS www.plantwise.org Created in Bangladesh , August 2012 Brown plant hopper of rice Recognize the problem The brown plant hopper is the most damaging insect in rice cultivation in Bangladesh. It is so damaging that sometimes the whole rice field is lost. The brown plant hopper is a tiny insect, which some farmers do not notice, even though their rice plants are covered in it. The brown plant hopper normally attacks at the base of the plant. First it sucks sap from the plants. The plant becomes dry and may even die. The worst...

Published at: plantwise.org

Rice yellow mottle (Ikivejuru)

20127801765.jpg

FACTSHEETS FOR FARMERS www.plantwise.org Created in Rwanda , May 2012 Rice yellow mottle (Ikivejuru) Recognize the problem Rice plants infected with Rice Yellow Mottle (also called RYMV or Ikivejuru in Kinyarwanda) have a yellowish streaking of leaves, are smaller than normal and have fewer tillers. The panicle does not emerge from the sheath and is of a bad shape, if it emerges, and with small and usually empty spikelet. Background Rice Yellow Mottle is a disease caused by a virus. The main way it is spread from plant to plant is by the...

Published at: plantwise.org

Controlling weeds in upland rice

20127801286.jpg

FACTSHEETS FOR FARMERS www.plantwise.org Created in Sierra Leone , May 2012 Controlling weeds in upland rice Recognize the problem Weeds are unwanted plants growing among the rice plants. Some are similar to the rice plant and others are different (they may have broad leaves). Weeds grow faster than the rice. The weeds compete with the rice plants for nutrients, water and sunlight and also act as a host for other pests and diseases. The weeds slow the growth of the rice resulting in low yields. Background Little time is needed for weeds to...

Published at: plantwise.org

Mealy bug management in coffee

20137803401.jpg

FACTSHEETS FOR FARMERS www.plantwise.org Created in Tanzania , October 2012 Mealy bug management in coffee Recognize the problem Coffee mealy bugs, also called Kenya mealy bugs, are pests of coffee. The pest attacks both Arabica and Robusta coffee. These small oval and flattened insects are just big enough to be seen by eyes (2.5 mm long and 1.5 mm wide). Their body is whitish- yellowish and segmented, but this is not easily seen as the body is often covered with white wax. White masses of bugs can be seen on upper side of leaves, and between...

Published at: plantwise.org

Direct seeding of rice

20147801356.jpg

FACTSHEETS FOR FARMERS www.plantwise.org Created in Pakistan , December 2012 Direct seeding of rice Recognize the problem Conventional rice sowing is difficult and yield is reduced because of: • a shortage of irrigation water • not enough labour at the time of transplanting • not maintaining the recommended plant population (80,000 plants/acre) • electricity shortage and high fuel prices Background Direct seeding is becoming popular among farmers because: • it is cheaper and quicker • it offers better control of grown weeds with...

Published at: plantwise.org

Leptochloa chinensis - A serious weed of rice

20147801366.jpg

FACTSHEETS FOR FARMERS www.plantwise.org Created in Pakistan , December 2012 Leptochloa chinensis- A serious weed of rice Recognize the problem Its common name is Lamb grass or Jangli grass. It is also found in India, Bangladesh and Sri Lanka. It is a tufted, smooth grass that reaches up to the height of your chest. It has a slender, hollow, erect stem growing up from a branching base. The stem is smooth and hairless. Background This grass has become a serious weed in rice fields. It has the ability to withstand waterlogged, drained and moist...

Published at: plantwise.org

Rice damping off

20147801539.jpg

FACTSHEETS FOR FARMERS www.plantwise.org Created in Afghanistan , October 2012 Rice Damping off Recognize the problem This is a soil borne fungal disease and can be recognized by the presence of a cottony or fine thread-like growth on the surface of the seed before or after its emergence at early stages. In severe cases the entire seed is covered by a cottony mass and no germination takes place. Background The disease is caused by either a single fungus or a complex of fungi. The temperature and moisture play an important role in the development...

Published at: plantwise.org

Attract ants against white stem borer in coffee

20147801032.jpg

FACTSHEETS FOR FARMERS www.plantwise.org Created in Tanzania , November 2012 Attract ants against white stem borer in coffee Recognize the problem African coffee white stem borers (CWB) are dark-grey and white-grey beetles up to 3 cm long with long dark antennae. Adult beetles are difficult to find, but can sometimes be seen on young leaves and green twigs. The 2 to 3 cm long pencil-thick young, called larvae, are white-yellowish. They feed inside the stem. You may find small holes in the bark, which lead to tunnels in the stem....

Published at: plantwise.org

Thrip management in rice

20147800014.jpg

FACTSHEETS FOR FARMERS www.plantwise.org Created in Cambodia , November 2012 Thrip management in rice Recognize the problem Thrips are tiny cigar-shaped insects with thin bodies and short legs. The adults are dark brown in colour while the young are paler. Thrips normally hide underneath unopened leaves and suck nutrients from the leaf. The feeding causes small silver marks or yellow patches on the leaf and stems. Heavy feeding causes the leaves to curl at the edges before turning yellow and dying. The plants become stunted and the whole plant can...

Published at: plantwise.org

Southern rice black-streaked dwarf virus

20167800101.jpg

FACTSHEETS FOR FARMERS www.plantwise.org Created in Vietnam , November 2012 Southern Rice Black-Streaked Dwarf Virus Recognize the problem Generally, the diseased paddy plants are dwarfed (stunted), with dark green leaves. Diseased leaves can be twisted just at the tip or along the entire leaf. Leaf veins have galls on the underside. Major veins on the sheath of immature plants are also swollen. From booting stage, diseased plants usually have unopen/twisted shoots and upright roots. Waxy galls and black stripes could be seen on sheaths and...

Published at: plantwise.org

Biocontrol of rice stem borer

20147801439.jpg

FACTSHEETS FOR FARMERS www.plantwise.org Created in Nepal , September 2012 Biocontrol of Rice Stem borer Recognize the problem The rice stem borer is a moth and its larva feeds on the stem around the node causing the stem to break. The adult moth is about 1.2-1.9 cm long. It lays its eggs on the lower surface of the rice leaves. Newly hatched larvae eat into the stems and cause the central shoots of tillers to dry up. Ears become white with empty or partially-filled grains. Entrance and exit holes on the stem are a sign of attack. Stem borers eat down the stem; they leave the stem above the...

Published at: plantwise.org

Management of brown planthopper in rice

20147801452.jpg

FACTSHEETS FOR FARMERS www.plantwise.org Created in Nepal , September 2012 Management of Brown Planthopper in rice Recognize the problem The brown planthopper (BPH) is an insect pest of rice in Terai. BPH is a small brown insect found mainly on the base of rice plants above the water level. Adults and young suck the plant sap from leaf sheathes, causing yellowing of lower and then upper leaves. Whole areas can die in patches which are said to be affected by “ hopper burn ”. It can cause total yield loss when its attack is severe....

Published at: plantwise.org

Pages

Filter by related pathogen:

Names

Althaea hirsuta in differrent languages.

Brambles Brambles

Q&A

Althaea hirsuta
Description

M. nigra is a deciduous tree, 6-9 m in height, slender but with numerous branches;it tends to be a bush if not trained when young (Orwa et al., 2009). The tree has scaly bark and is usually kept pruned to a smaller, open, spreading shape. It can produce quite a dense and shady canopy. Leaves are rough on upper surfaces and pubescent underneath, 7-12.5 cm long, often producing leaves of several different shapes, with 1 or more lobes, multilobed leaves often appearing on the same branches as lobeless ones;abnormally shaped leaves usually produced from stem shoots or sucker growths, and frequently by very vigorous young branches. Flowers held on short, green, pendulous, nondescript catkins that appear in the axils of the current seasonÕs growth and on spurs on older wood. The flowers appear in 1.3 cm scaly clusters, female flowers ripening quickly into 1.3-2.5 cm blackberry-shaped edible fruits. Botanically, the fruit is not a berry but a collective fruit, an ovoid syncarp, made up of achenes each of which is covered by a succulent calyx;the fleshy bases of pollinated flowers begin to swell and ultimately become completely altered in texture and colour, becoming succulent, fat and full of juice. In appearance, each tiny swollen flower roughly resembles the individual drupe of a blackberry. The colour of the fruit does not identify the mulberry species which are better differentiated by their leaf and wood characteristics.


Source: cabi.org