Haplothrips tritici (Kurdjumov) (Bournier A. / ENSA Montpellier) Adults Still in ear of wheat.. Haplothrips tritici (Kurdjumov) (Coutin R. / OPIE) pupa Overwintering. The leaves of wheat are sucked by H. tritici adults, causing streaks. The ripening seeds of wheat are sucked by H. tritici nymphs, leaving brown spots caused by. PDF | The wheat thrips, Haplothrips tritici, is known from across eastern Europe and adjoining areas of Asia into western Europe and north.
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It was shown that when the average number of adult thrips per ear were7. In China, indimethoate and trichlorphon were applied for control of H.
Zashchita rastenii ot vreditelei i boleznei v Zapadnoi Sibiri. It was shown in special tests that the roots of seedlings from grain damaged by H. Mature larva is bright red, with two setae at the end of abdomen. Eggs develop over a period of days. Pests Haplothrips tritici Kurd.
Deutsche Entomologische Zeitschrift57, — According to data obtained by Tanskii the loss in weight with a very mild infestation amounted to 5. Chemical treatment might be envisaged in some cases, but never haplotrips than the period of milky ripeness Kamechenko, Bournier and Bernaux found that H. The abundance of wheat thrips was times lower in rotation crops than in monocultures Antorenko, Knowledge Bank home Change location.
The results revealed a certain relationship between the number of thrips entering an ear at the stage of blooming and the consequent loss of grain weight. In spring the larvae passing through metamorphosis perish because of heat and lack of moisture.
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Haplothrips (Haplothrips) tritici – Thrips Wiki
Journal of Natural History41, — Egg is pale-orange, oblong-oval, 0. Journal of Natural History42, — Bioecological features of wheat thrips in north Kulunda and Ob forest-steppe. When preparing to hibernate the larvae can penetrate into soil to a depth of cm or more to 90 cm.
Thysanoptera in forest-steppe of middle Volga region.
Thrips Thysanoptera as pests of cereals in conditions of Ukraine. In Siberia, indamage on wheat was due chiefly to Hqplothrips. Continuing to use www. The main host plants are winter and spring wheat, rye, wheatgrass and some other gramineous plants; spring wheat is the most favorable for insect development.
Adult has immature ovaries and requires additional feeding. In Russian Tanskii V.
Host-Plant Resistance Varieties of wheat in which the last stage of booting or the initial stage of heading is earlier than the peak occurrence of H. The period of metamorphosis is strongly prolonged about one month. The ability of plants growing from seeds damaged by the thrips to regenerate damaged root systems was reduced, as was the plant weight and leaf area Shurovenkov, The weight of grains of the sample containing the minimum population of thrips nymphs served as his standard of comparison.
In the Elblag region of Poland inH. The selection of varieties of hard wheat with characteristics that prevent H.
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The ratios among the adults, eggs and nymphs were 1: Volodichev reviewed the harmfulness of H. Subscription Login to verify subscription. Larvae over-winter underground and among stubble.
Haplothrips tritici – Wikispecies
Alopecurus aequalis Dent foxtail. The most intensive flight coincides with the beginning hapllothrips ear formation of spring wheat where the great bulk of adults concentrate. A field study carried out in China in during the growth stages of winter wheat and spring wheat showed that from early May to early June, the number of adults at the last stage of booting or the initial heading stage, the number of eggs at flower stage and the number of nymphs at milk stage haplotjrips winter wheat were 3.
In Russian Zhichkina L. Krasilovets and Rabinovich reported that late winter wheat varieties were times more infested than early varieties. A close relation was found between the closeness of the ears and the degree of damage.
Dry and warm weather during ear emergence and flowering of wheat the period of egg-laying and the beginning of larva feeding promotes increased insect survival; prolonged air drought and cool rainy weather are both unfavorable for insect development. Publications de la Institut Desert Egypte13, 1— In Bulgaria, research showed that the wheat varieties which had a shorter vegetation period were attacked to lower degrees and showed lower loss than wheats that matured later Veselinov, Biological Control The effect of natural enemies on field populations of H.
In the Cluj district of Romania inH. Females lay their eggs in small groups containing eggs each or, less frequently, one at a time, on the interior sides of ear scales and ear shank.
The nymphs and adults damaged the leaf-sheaths, ears and grains of wheat Tunc,