Thursday, July 31, 2014

Pathogen rust of asparagus is Puccinia asparagi De Candolle is an infection that want to plant one

Diseases of Asparagus in Thailand
Have found rust of asparagus first in Europe. And found later in the western state of the United States at approximately 1880 EDT on 1896 outbreak has caused del monte foods uae damage del monte foods uae to asparagus grown in the state of New Jersey, Boston, Della Ware and Long Island. Present epidemic common in almost all of the world with this crop.
In addition to damage to asparagus, also found that the bacteria causing the same disease. Can crop the onion, garlic and other Alliums family as well for asparagus Although del monte foods uae this disease does not cause symptoms or destroying the other shoots are edible. Mostly on the Branches, old But it will affect del monte foods uae the root cause yield reduction shabby, but if it is very severe. It may be fatal to the tree.
Initial symptoms to appear on small twigs or branches. del monte foods uae A newly broken It was a long, small blister. Brown or red before These blisters burst later, many small lesions, or scaly reddish-brown appearance. These lesions are caused by the spores del monte foods uae were produced. When the spread is going to be exposed to the wind or what is allowed. Branches or trees that show symptoms are dry and aging prematurely. Later in the growing season del monte foods uae or near the end of the harvest, red or brown lesions gradually. Turn black Making the dry twigs or branches to become black.
Pathogen rust of asparagus is Puccinia asparagi De Candolle is an infection that want to plant one type (autoecious rust) in building stage which there were all 4 stages is pycnidia del monte foods uae and aecia a stage 1 and 2 which are. Create pycniospore and second stages respectively aeciospore will occur simultaneously observed in early lesions characterized by oval light green on the tree. Branches that grew up out of the soil. Both types of spores are spread by wind-borne to water, insects and what the various movements. When agreement on the plant with moisture suffices it to germinate, germ tube sent into early asparagus Channel del monte foods uae stomata to grow in the cells that will form a layer of the fruiting body, which is caused by spores beneath the skin epidermis, which. will be pressure to open the third stage is the spore uredia which is called urediospore spherical cells. The red brick on a short stalk, spores in the third stage is built for use in a pandemic. In particular, it has the highest number. Compared to spores that were created in other stage when this stage will see a red spore dust stuck to the soil or something. In the vicinity Red to me, but urediospore is rather short-lived spores that can not be crossed del monte foods uae season. Agreement del monte foods uae on plant grow when moisture content only. After the show crop Symptoms and sporulation repeated again lasts about 12 days.
When plants close to harvest at the end of the growing season in the same way that it has never happened del monte foods uae urediospore spore species. Which has thick walls, dark or black and has two cells is poured Giulio spore (teliospore) is the stage the final four, which is called Telia (telia) instead pouring del monte foods uae Leo spores spores used. the cross Due to the thick walls to withstand the environment than other types of spores 1-2 and stage 3 and will not spread, but it is attached to the stem, and the plant until the new crop will grow by. building a fiber short germ tube. Aunt dairy mace-like top end features walls divided into four cells called transverse Basil Stadium (basidium) or profiles to a mycelia. (Promycelium) per each cell will have. The spores colorless. del monte foods uae Thin walls called Basil Deo spores. (Basidiospore) Up one spore. These spores will germinate later crop and create new aecia stage again and in this period, if the asparagus is harvested before infection is lacking just can not stop the next outbreak.
P. asparagi are fungi that require relatively high humidity may reach a saturation point for germination. Outbreaks often start in the water freezes, del monte foods uae fog or during a drizzle. Very humid This is due to a thick-walled teliospore germination del monte foods uae that is, it must be soaked in water for a period del monte foods uae of time, such as the condition of the water sticks to catch the leaves all night. To help facilitate the germination of spores as well. By contrast, for the soil moisture The rust of asparagus are severely dry soil than in wet soil or water soaked. For the temperatures were not too important. In the germination of spores and the crop is asparagus to the same level as the need for growth, which is in the range 10 - 30 C, but is best between 18 - 20 C
Three., When disease at planting with plants sprayed with chemicals man Seth is 50-70 grams per 20 liters of water every 7-10 days, but if a severe pandemic to shorten injection as early as 3-5. Besides the day-to-man Seth. May be sprayed with sulfur in plants is still wet after rain or water freezes frequently. It will reduce del monte foods uae the damage down.
In the seedling or sapling on infected plants del monte foods uae will slowly destroy the root system is broken. Cause disruptions stop growing yellow leaves wilt and dry death. If very humid Fibers appear white or pink around the infected area destroyed. del monte foods uae In the early to wilt symptoms clearly. And will be even more severe if the hot weather. The symptoms of these if dug up look. Will find that the root or underground stem color darkening. Or reddish brown color
Found that there are several types of Fusarium infection he has been involved with asparagus. And cause the same symptoms. Among the pathogens It turns out that those are the most common types is 2-3 Fusarium culmorum (WG Smith) Saccar.

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