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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The objective of this report is to examine the published literature, and to consider this in relation to observed structural variation in recently collected samples as well as specimens in museums that are variously labeled as one or other of these two species. When selecting wheat varieties resistant to H.
Shurovenkov and Mikhailovna reported that the degree of damage by H. Unlike the Sunn Pest, the flour-baking quality of grain damaged by thrips does not decrease, however the sowing quality of seeds drops notably.
Dry and warm haplothrops during ear emergence and triici 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. Ears with a close structure, having little space between the scales, were less heavily infested than ears with a more open structure Shurovenkov and Mikhailova, Flying adults migrate by way of air streams at heights of 1. Females lay their tritcii in small groups containing eggs each or, less frequently, one at a time, on the interior sides of haplotheips scales and ear shank.
The period of metamorphosis is strongly prolonged about one month. In spring the larvae passing through metamorphosis perish because of heat and lack of moisture.
Deutsche Entomologische Zeitschrift57, — Larvae over-winter underground and among stubble. Tanskii took the following symptoms as indicators of the degree of grain infestation: Eggs develop over a period of days. The ripening seeds of wheat are sucked by H.
Journal of Natural History42, — Tastenov and Shul’gina reported that fenvalerate applied between wheat germination and heading may control wheat thrips. Features of biology, ecology and harmfullness of wheat thrips, Haplothrips tritici Kurd. A close relation was found between the closeness of the ears and the degree of damage.
Mature larva is bright red, with two setae at the end of abdomen. Several species of fungi and bacteria were isolated from the grain furrows damaged by H. The ratios among the adults, eggs and nymphs were 1: Adults appear haplothrios the beginning of ear formation of winter cereals, usually tgitici May-June. Information was provided showing that late winter wheat varieties were times more infested by H.
Pests Haplothrips tritici Kurd. The selection of varieties of hard wheat with characteristics that prevent H. Zashchita rastenii ot vreditelei i boleznei v Zapadnoi Sibiri.
Cultural Control Deep ploughing to a depth of about 25 cm after spring wheat harvest or after one shallow ploughing, is an effective method of controlling the population of H. In Russian Tanskii V. Bournier and Bernaux found that H.
Larval peak density occurs during the milk development stage of seeds. Part of larvae metamorphosis occurs underground.
AgroAtlas – Pests – Haplothrips tritici Kurd. – Wheat Thrips
Kurdjumov first mentioned that H. To a lesser degree the pest harms winter rye, barley, and other cereals. Female length is 1. Subscription Login to verify subscription. In Russian Sitchenko N. Lewis indicated that most effective H.
A threshold of 80 individuals per ear was established for spring wheat and this was seldom exceeded. In China, indimethoate and hwplothrips were applied for japlothrips of H. The second molt occurs after wintering.
In Russian Shurovenkov Yu. Minaei and Mound indicated that they considered the records of cerealis from Iran to be based on misidentifications of triticibut they suggested that further studies were required to determine if there is any haplotthrips that these names represent different species in other countries. Haplothrps thrips in Transural region haplothfips its control. 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, 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 on winter wheat were 3.
Haplothrips (Haplothrips) tritici
Taking into consideration the difference between the weight of uninfested grains and that of grains with different degrees of infestation, estimates of total grain loss have been made. User Username Password Remember me. Class Insecta, order Thysanoptera, suborder Tubulifera, family Phloethripidae, tribe Haplothripini, genus Haplothrips.
The species is widespread in steppe and forest-steppe regions, belonging to the Euro-Siberian faunistic complex. Feeding by both adults and nymphs reduced the weight of the grain and had an adverse effect on its quality Lakhmanov,