Life Cycle. crass Pratylenchus sp. eggs in root tissue, crass the first turn of the skin occurs cra

Nematodes Pratylenchus is measuring very small parasitic nematodes among other plants. These nematodes body width of 40 μm to 160 μm, with a body length of 0.4-0.7 mm, whereas the diameter of the body of 20-25μm. In some types of sexually transmitted both areas, but some other kind of male sex does not exist.
These nematodes form generally elongated, the head ujungan terior horizontal figure 1, with a strong head frame, a short and strong stilet, 14-20 μm in length with a clear basal knob. Esofagusnya glands overlap in the ventral colon. Excretion mouth hole is near the confluence of the esophagus and intestinal area. Vulva at the posterior region. Females have a single gonad and vulva have a short post bag. Anulasinya fine and has four lateral lines, but there are also varieties that have up to eight. The tail width, ujunya rounded and pointed, length 3.5 to 9% of body length. Male nematodes usually smaller than the females.
Endoparasit nematodes Pratylenchus me represented a prevalent sapphire irrigated area in Indonesia. Nematodes attack P. brachyurus on sapphire crops cause stunted plant growth, leaf color red or yellowish and cause wound necrosis at the roots and sometimes root rot (Mustika et al. 1995; Harni & Mustika 2000). Besides inhibiting the growth of crops, infection of P. brachyurusjuga able to lower the rate of chlorophyll and oil, good or relatively resistant to susceptible cultivars (Sriwati 1999). The damage from the attack of the nematodes on sapphire can lower crop yields up to 85% (Mustika et al. 1995).
Frame head hardens and becomes very apparent. Both genders active, elongated body. To the two sexes is low, wide and rounded or flat anterior part, (except on Radopholus), a width of about half to three-fifths the length stilet. crass Stilet basal joint with a large knob. Three esophagus gland lobes overlapping the intestine. have one or two ovaries. Long-tailed doe two or more times the width of the anus. The tail reaches the tail end. Pratylenchus, Radopholus, Hirschmaniella, and Nacobbu. Included in endoparasit, that attack the plant network. Some are sedentary (settled) and some are migratory (moving). crass Small stature, like Criconematidae esophagus. Anulasi fine, not a decoration crass or overlap. Having crass one ovary, vulva located at the rear of the body. Stilet females grow well, while in males reduced the.
Life Cycle. crass Pratylenchus sp. eggs in root tissue, crass the first turn of the skin occurs crass in eggs and three times the turnover of the skin, the following occurs outside (after hatching). The 15-17 eggs a day, 3 times instead of leather. The pro oviposisi 15 days, until the time of the generation crass process instead of 45-48 days skin (molting) on Pratylenchus brachyurus.Telur when the larvae hatch will appear second stadia, but decentralized clusters placed in the root and stadia tanah.Semua move between roots and soil. better.
How nematodes attack the roots and influence on the crop. Nematodes attack the roots of plants to mechanical damage may result. Nematodes that cause damage to crops almost all live in the soil, both of which live freely in the soil outside crass the root and the stem in the ground but there are some parasites whose lives are lived in the roots and stems.
Symptoms generally nematodes attack plants namely sapphire showed symptoms dwarf, leaves yellowish, reddish and fall further until the crops suffer then die. In addition to reddish yellow sapphire leaf, root rot and there is a bump-bump roots. Symptoms on leaves yellow sapphire attacked nematodes look like symptoms of a shortage of N, P, and K. Concentration greater living nematodes found in the host plant rooting mainly due to a faster reproductive rate because the availability of adequate food and nematodes impressed by substances released in the rhizosphere first, nematodes eggs are placed in the root - plant roots in the soil which then eggs will develop into larvae and adult nematodes. Gathering populations of nematodes encourages rooting around nematodes attack the roots of the road pierced the cell wall. Adult nematodes constantly moving every second, every hour, every day and settled around crass the roots of the movement - the movement of nematodes biting and injecting saliva crass at the root of the plant, causing the plant cells become damaged. crass Symptoms of swelling and damage crass to root nematodes are marked with the yaws root (gall). Cuts root, root tip and root rot ak