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11.
12.
Resistance to bifenthrin and resistance mechanisms of different strains of the two-spotted spider mite (Tetranychus urticae) from Turkey 总被引:2,自引:0,他引:2
Nine different strains of the two-spotted spider miteTetranychus urticae Koch (Acari: Tetranychidae) were collected on cotton from Adana, Antalya, Izmir, Manisa and Urfa in Turkey. Their responses
to bifenthrin were investigated using conventional bioassay and biochemical assays. LC50 and LC90 values of bifenthrin were determined for all strains by using a residual bioassay with a petri dish-spray tower. Resistance
ratios were determined by comparing the samples with a standard susceptible strain, GSS. The resistance ratios of the strains
ranged from <1 to 669-fold (at LC50). Of the investigated field strains, only three (two from Adana and one from Urfa) were resistant to bifenthrin. There was
a correlation between esterase enzyme activity and bifenthrin resistance according to polyacrylamide gel electrophoresis and
microtiter plate assays in the three resistant strains.
http://www.phytoparasitica.org posting May 17, 2005. 相似文献
13.
14.
A leaf disc bioassay was employed to investigate the influence of host species of deciduous fruit trees, like apple, peach,
plum, cherry and apricot, on the development and reproduction of the hawthorn spider mite Tetranychus viennensis Zacher in the laboratory under conditions of 25±1°C, 60±10% RH and a photoperiod of 16 h: 8 h light: dark. This was done
by determining the duration of each life stage of the mites, the intrinsic rate of population increase (r
m
), mean generation time (T) and net reproductive rate (R
0) of the spider mites on each of the host plant species. Differences in life table parameters of the spider mite among host
plants were analyzed with the jack-knife method. The results indicated that plum might be the best suitable plant for the
spider mite among the plants tested due to shorter developmental period and higher intrinsic rate of increase, whereas cherry
and apricot were least suitable due to their long developmental duration and low intrinsic rates of increase. When the spider
mites were transferred from apple to other fruit trees, negative effects on developmental duration, fecundity and life table
parameters were found in the first generation, but the effects faded out in succeeding generations. When transferred onto
plum and peach, the spider mite adapted to the new hosts in the second generation; however, on cherry and apricot, it adapted
in the third generation.
__________
Translated from Acta Ecologica Sinica, 2005, 27(7) [译自: 生态学报, 2005, 27(7)] 相似文献
15.
16.
几种杀螨剂对3种叶螨的毒力比较 总被引:1,自引:0,他引:1
作者于 1 996年对二斑叶螨 (TetranychusurticaeKoch)、朱砂叶螨 [T .cinnabarinus(Boisdural) ]和山楂叶螨 (T .viennensisZacher)进行了三氯杀螨醇、甲氰菊酯、哒螨酮、霸螨灵等 4种杀螨剂的毒力测定 ,并对 3种叶螨在LC50 和LC95水平上 ,比较了相互之间的毒力差别。结果表明 ,二斑叶螨的毒力最高 ,朱砂叶螨次之 ,山楂叶螨毒力最低。 相似文献
17.
Summary The inheritance of resistance to the twospotted spider mite and of bitterness in cucumber has been studied in three sets of P1, P2, F1, F2, B11 and B12 of crosses between three bitter, resistant lines and one non-bitter, susceptible line. Resistance to the twospotted spider mite as measured by acceptance and oviposition appeared to be determined by several to many genes, which are inherited mainly in an additive fashion. Bitterness is basically governed by the gene Bi, which, contrary to earlier reports, is inherited in an intermediary way, while the expression of Bi is influenced by additively inherited intensifier genes. Whereas Bi and the bitterness intensifier genes are not related to the resistance factors acceptance and oviposition, they are related to resistance or tolerance as measured by the damage index. This relation is explained by linkage rather than by identity of the genes concerned. Changes in the test methods and breeding consequences are discussed. 相似文献
18.
Seyedeh Masoumeh Fotoukkiaii Zoë Tan Wenxin Xue Nicky Wybouw Thomas Van Leeuwen 《Pest management science》2020,76(3):1154-1163
19.
本调查了用红蜘蛛危害叶饲养原蚕的茧质、死笼率及产卵质量,与对照缃比:全茧量下降16%~18%,茧层量下降20%~23%,死笼率增加6%左右,产卵量明显减少,减少20%~24%,不受精卵率增加。并分析了今春红蜘蛛暴发的原因,提出了防治红蜘蛛的几项措施。 相似文献
20.