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 หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Citrus Leafminer, Phyllocnistis citrella Stainton (Lepidoptera: Phyllocnistidae) and Its Natural Enemies) ผู้เขียน: นางสาวณิชานันท์ เกินอาษา, ผู้ช่วยศาสตราจารย์ , ดร.วิวัฒน์ เสือสะอาด, รองศาสตราจารย์ , นายโกศล เจริญสม, รองศาสตราจารย์ สื่อสิ่งพิมพ์:pdf AbstractBiological study of the citrus leafminer, Phyllocnistis citrella Stainton (Lepidoptera: Phyllocnistidae) revealed that egg eclosion was 3.10?0.46 days. The larva consisted of four instars before pupation. The mean durations of larval, pupal, male and female adults were 4.20?0.53, 8.04?0.92, 2.59?0.93 and 4.04?1.26 days, respectively. The analysis of biological life table resulted in the following biological attributes: the net reproductive rate of increase (Ro) was 23.3946; the capacity for increase (rc) was 0.1944; the finite rate of increase (?) was 1.2146 and the cohort generation time (Tc) was 16.2158 days. The investigation on natural enemy complex of P. citrella was conducted in many citrus areas in Thailand. Survey carried out from July 1998 to June 2000 found 11 species of hymenopterous parasites namely Quadrastichus sp., Citrostichus phyllocnistoides (Narayanan), Teleopterus sp. and Microbracon sp. as larval parasites, and Ageniaspis citricola Logvinovskaya, Cirrospilus ingenuus Gahan, Sympiesis striatipes (Ashmead), Closterocerus trifasciatus Westwood, Eurytoma sp., Zaommomentedon brevipetiolatus Kamijo and Tetrastichus sp. as pupal parasites. The other natural enemies as predators were found in the larvae of Chrysoperla sp. and some spiders feeding on larvae of P. citrella. The evaluation revealed that Quadrastichus sp. was the most important larval parasite and A. citricola was the most important pupal parasite. These parasites would be used as biological control agents of P. citrella in Thailand. |
หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Biology and Demography of a Springtail, Xenylla sp., Reared on a Substrate Treated With Effective Microorganism (EM)) ผู้เขียน: เกษม คงนิรันดรสุข, Vacharobon Thirakhupt สื่อสิ่งพิมพ์:pdf AbstractE ffective Microorganism (EM) is a proprietary liquid containing many co-existing microorganisms and is widely used to increase crop yields in Thailand. However, there is little knowledge and no scientific proof on the influence of EM on soil microarthropods which serve as bioindicators of soil fertility. There is a possibility that EM promotes their growth and indirectly improves the soil fertility. EM was added to the substrate and the biology of Xenylla sp. was compared to substrate treated with molasses and a control added with water only. Observations under a stereo microscope were made to record the life history and a life table was constructed. EM caused a significantly lower hatching percentage and adult life expectancy and the developmental time from the juvenile to adult stage was delayed when compared to the control, but not to the molasses (P < 0.05). However, the effects on net reproductive rate, finite capacity of increase, intrinsic rate of natural increase, generation time and doubling time were not significant, probably due to the rapid growth of fungi that covered the egg surfaces causing water loss and lower egg viability. The lower relative humidity and accumulation of metabolic wastes by fungi are believed to suppress the well being of the insects. EM did not demonstrate significantly positive effects on the biological performance of this Xenylla species. |
ผลงานตีพิมพ์ในวารสารวิชาการFast Population Growth in Physogastry Reproduction of Luciaphorus perniciosus (Acari: Pygmephoridae) at Different Temperaturesผู้แต่ง:Bussaman, P, Sa-Uth, C, Dr.Angsumarn Chandrapatya, Professor , Atlihan, R, Gokce, A, Saska, P, Chi, H, วารสาร:  
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