中国植绥螨四新种(蜱螨目:植绥螨科)

植绥螨是有害螨类的重要天敌,在生产实践中已引起人们的重视。本文报道作者采自我国四川省和广西壮族自治区的植绥螨科四个新种,采用Rowell et al(1978)的毛序命名系统,测量长度单位为微米。模式标本保存于广东省昆虫研究所。 1.松盲走螨Typhlodromus(Anthoseius)pineus新种(图1一7)     

拟长毛钝绥螨抗乐果品系的筛选及遗传分析

生物防治手段所用生物物种的抗药性遗传改良是害虫综合治理的一个新研究领域.本文以农业害螨的重要捕食性天敌——拟长毛钝绥螨Amblyseius Pseudolongispinosus Xin,Liang et Ke的一个群体为材料,经杀虫剂乐果19次选择后,使抗药性比原来增长10.02倍.拟长毛钝绥螨抗乐果品系是由多基因隐性遗传的.     

中国南方植绥螨属三新种(蜱螨目:植绥螨科)

植绥螨是农林害螨的重要捕食性天敌,已引起人们的广泛注意。本文描述了采自我国湖北、云南、广西等地的植绥螨科植绥螨属三个新种。测量长度单位微米。模式标本保存于广东省昆虫研究所。 本文采用Rowell et al 1978毛序命名系统。     

REPRODUCTIVE DIAPAUSE IN TYPHLODROMUS OCCIDENTALIS NESBITT (ACARINA: PHYTOSEIIDAE) FROM SOUTHERN NEW SOUTH WALES

Abstract
Studies on the reproductive diapause of an introduced insecticide-resistant strain of the phytoseiid predator, Typhlodromus occidentalis Nesbitt, from southern New South Wales are reported. Diapause was induced in 43–59% of predators when reared at 16 or 19°C under photophases of 10–12 h. No diapause induction response curve with changing photophase was evident. Diapause in overwintering predators was readily terminated by exposure to warm temperatures and a long photophase. The rapidity of diapause termination increased progressively during winter. The apparent loss of dependency upon reproductive diapause as an overwintering strategy in this strain of T. occidentalis is discussed.     

西藏钝绥螨属一新种(蜱螨目:植绥螨科)

本文记述西藏钝绥螨属一新种,模式标本保存在南昌江西大学生物系本文测量单位为微米。 西藏钝绥螨Amblyseius xizangensis新种 雌螨(图1—6) 背板长503.6,宽300.0。前背板侧缘及后背板大部具网纹。背板刚毛18对,孔9对,刚毛D7对,M2对,L9对。S_1和S_2位于盾间膜上。各刚毛长:D_133.8,     

我国南方柑桔钝绥螨属及其新种描述(蜱螨目:植绥螨科)

桔全爪螨Panonychus citri(Mcgregor)是柑桔产区发生普遍而为害严重的一种叶螨。柑桔园的钝绥螨属Amblyseius Berlese 1914捕食螨主要捕食桔全爪螨和其它害螨,如跗线螨、细须螨、瘿螨;同时还捕食其它微小昆虫,如小蛾类的卵、蚜、蚧、蓟马、啮虫等幼虫。本文记述了我国南方部分地区柑桔园钝绥螨属16种,其中有2种新种,2种雄性为首次描述,带*者是人工繁殖利用及生物学研究的种类。有些种类已列为害螨综合防治中的重要因素。新种模式标本保存于广东省昆虫研究所。(本文测量长度单位为微米)     

THE OCCURRENCE OF CERTAIN MOSQUITO SPECIES UNDER SEVERE DROUGHT CONDITIONS IN THE SOUTHERN WIMMERA OF VICTORIA

i
During severe drought in the southern Wimmera, mosquito occurrence was severely restricted or stopped at all sites except permanent springs. Salting of creeks and trampling of dam margins by stock appeared to play a significant role.     

AN OCCURRENCE OF CORDAITES IN THE UPPER PENNSYLVANIAN OF ILLINOIS

Cohen , Lila M., and Theodore Delevoryas . (Yale U., New Haven, Conn.) An occurrence of Cordaites in the upper Pennsylvanian of Illinois. Amer. Jour. Bot. 46(7): 545–549. Illus. 1959.—Cordaites validus a new cordaitean species from Calhoun, Illinois, is described. It is characterized by one or more vertical series of large, barrel-shaped parenchyma cells in association with the primary xylem, a short transition zone of primary xylem elements, extremely shallow uniseriate rays and generally uniseriate pitting. This species represents the first North American Cordaites shown to be endarch throughout.     

贵州省钝绥螨属二新种(蜱螨目:植绥螨科)

本文报道了采自贵州省植绥螨科钝绥螨属二个新种。测量长度单位微米。模式标本保存于广东省昆虫研究所。 长管钝绥螨Amblseius(Amblyseius)longisiphonulus新种(图1—4)     

THE OCCURRENCE OF TRICHOSCLEREIDS IN THE MONSTEROIDEAE (ARACEAE)

Nicolson, Dan H. (Cornell U., Ithaca, N. Y.) The occurrence of trichosclereids in the Monsteroideae (Araceae). Amer. Jour. Bot. 47(7): 598–602. Illus. 1960.—A study was made on the presence, distribution, and frequency of trichosclereids within the leaf-blade, petiole, and stem of 32 species of Monsteroideae and I species of Pothoideae. Trichosclereids occurred in all species studied. Distribution and frequencies of trichosclereids were variable. Trichosclereids occurred more consistently in the petiole than in the leaf-blade or stem tissues. A new report of trichosclereids outside of the Monsteroideae, in Pothos repens (Lour.) Druce of the Pothoideae, is made. The tribe Spathiphylleae (Spathiphyllum and Holochlamys) was found to be characterized in part by large numbers of trichosclereids occurring in groups within the leaf-blade.