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1.
黄刺蛾的生活习性及防治技术 总被引：3，自引：0，他引：3
黄刺蛾在通化地区1a1代，以幼虫在为害树的枝叉处结茧越冬，是园林植物的主要食叶害虫之一。可采用秋冬季节人工摘除虫茧或敲碎树干上的虫茧，用黑光灯诱杀成虫，幼虫期喷施每克含孢子100亿以上的青虫菌600倍，喷施80％敌敌畏乳油1000—1200倍液或50％杀螟松、50％辛硫磷乳油1000—1500倍液、50％马拉硫磷乳油1000倍液、25％亚胺硫磷乳油1300倍液、5％来福灵乳油3000倍液、2．5％氯氰菊酯乳油2000，3000倍液等方法进行防治。 相似文献
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根据桑天牛的发生规律，采用捕捉成虫、灭卵、药剂注射及生物药剂防治等综合措施，可控制其危害。药剂注射以８０％敌敌畏乳油，２．５％溴氰菊酯乳油，稀释５００倍，４０％氧化乐果乳油稀释３００～５００倍，用注射器注入桑天牛排粪孔（或侵入孔）或蘸在棉花球上塞入虫孔内，防治效果均在９５％以上。 相似文献
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刺桐姬小蜂药剂防治试验研究初报 总被引：3，自引：1，他引：2
用16％虫线清乳油,3％啶虫脒粉剂,雅丹（35％硫丹EC）油剂,20％阿维、三唑磷乳油和25％吡虫啉粉剂等5种药剂对刺桐姬小蜂进行药剂防治试验,试验结果表明,试验药剂对刺桐姬小蜂幼虫和蛹均不起作用,而对成虫有较强杀伤力。几种药剂以16％虫线清乳油、雅丹和20％阿维、三唑磷乳油防治效果比较理想,死亡率较高,最高的死亡率为100％,而各浓度之间的防治效果差异不显著。 相似文献
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花椒白蜡绵粉蚧的生物学观察和防治 总被引：2，自引：0，他引：2
白蜡绵粉蚧在涉县主要为害花椒，１年１代，以若虫在枝干上越冬。若虫和成虫活动期，可用９６８８－Ⅰ号或９６８８－Ⅱ号农药稀释１０倍液涂干或分别喷洒５０％辛硫磷、４０％久效磷、１０％克蚧灵乳油１０００倍液，毒杀活动若虫和成虫。 相似文献
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枣叶甲生物学及防治初步研究 总被引：1，自引：0，他引：1
枣叶甲是枣树上的一种主要食叶害虫，该虫在浙江一年发生１代，以老熟幼虫在土下越冬，防治主要用８０％敌敌畏乳剂，５０％甲胺乳油等农药喷杀成虫，效果显著。 相似文献
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枣叶甲Ｆｌｅｕｔｉａｕｘｉａａｒｍａｔａ（Ｂａｌｙ）是枣树上的一种主要食叶害虫，该虫在浙江一年发生１代，以老熟幼虫在土下越冬。防治主要用８０％敌敌畏乳剂，５０％甲胺磷乳油等农药喷杀成虫，效果显著。 相似文献
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柑桔星天牛Anoplophora Chinensis Forst.是危害柑桔的一种主要害虫,一年发生一代,以幼虫在被害树干基部或主根内越冬。防治该虫可采用捕杀成虫、消灭虫卵和初孵幼虫、用棉球或废纸浸40％乐果乳油10倍药液或90％敌畏乳油10倍药液塞入虫孔毒杀幼虫及虫孔注射1:10的敌敌畏药液杀死幼虫等办法。 相似文献
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该文研究了杨细蛾在新疆阿勒泰地区河谷林的发生与环境的关系，并采用物侯法，有效积温法，历期推算法对该虫成虫，卵，幼虫的发生期进行预测，以成虫或卵为基数预测３龄幼虫发生量，提出了加强营林措施，保护天敌及使用４０％氧化乐果，８０％敌敌畏或用５０％杀螟硫磷，５０％倍硫磷乳油的稀释液防治幼虫，用敌马烟剂或使用７４１插管烟剂防治成虫等防治方法。 相似文献
11.
Kari KELIVAARA 《中国林学(英文版)》2008,10(1):14-18
Biological characteristics of a new record pest insect Acanthocinus carinulatus Gebler has been reported in China. During the last few years, outbreaks of this insect in larch （Larix gmelinii Rupr.） plantations of Aershan, Inner Mongolia have occurred. Each year one generation is born. The insects only damage the phloem in L. gmelinii, overwinter in galleries as larvae and pupate in May of the following year. The pupation culminates in late May. The pupal phase lasts about 45 d. Adults emerge in early June and require nutrition after emergence. Mating and oviposition occur from late June to early August and the adult males and females and may copulate many times in their lifetime. The female adults lay eggs in bark crevices. Oviposition sites with one egg occupy 70.5% of all sites, sites with three eggs occupy 6.8% and 22.7% of all crevices are without eggs. Eggs stay in this stage for a period of 7 to 11 d. Larvae hatch in early July and hibernate in early September. The rate of successful hatching is only 37.8%. 相似文献
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为了缩短育苗周期,对药用植物母猪果不同个体间插穗生根能力的变异进行研究。研究表明:母猪果不同个体间插穗的生根率、根系效果指数和平均生根速度均存在着较大的变异性,其中成年树生根率的变异范围在0%~90%,幼年树生根率的变异范围在13.5%~100%之间。相关分析表明:成年树插穗的生根率与根系效果指数存在显著的正相关关系;与平均生根速度之间存在着显著的负相关关系。因此,建议选择生根率高、发根能力强且生根快的植株作为采穗母株。此外对不同年龄段采穗母树插穗的生根能力分析表明,母猪果幼年树母株的生根能力较成年树强。 相似文献
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两种卵蜂在舞毒蛾卵上的寄生动态 总被引：3，自引：0，他引：3
北京地区大蛾卵跳小蜂和舞毒蛾卵平腹小蜂在舞毒蛾卵上一年可以分别完成４－５代和２—３代。两种卵蜂对舞毒蛾的寄生率因采集时期不同而有差异，以８月采集的卵块寄生率最高。７月中旬至８月中旬采集的卵中大蛾卵跳小蜂的寄生率为２．２６—４．１８％。７月中下旬采集的，舞毒蛾卵平腹小蜂的寄生率为０．６４—０．６６％。大蛾卵跳小蜂当年羽化的占９９．３％，次年羽化的占０．７％。舞毒蛾卵平腹小蜂当年羽化的占８１．０％，次年羽化的为１９．０％。为保护两种卵蜂，人工采摘卵块除治舞毒蛾的最好时期是９月下旬至次年３月下旬。 相似文献
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George J. Stathas Panagiotis A. Eliopoulos George Japoshvili Dimitris C. Kontodimas 《Journal of pest science》2009,82(1):33-39
The ecology of the coccid Protopulvinaria pyriformis infesting the laurel Laurus nobilis was studied from October 2003 to September 2005 in SW Greece. The coccid is parthenogenetic and oviparous, producing increased
amounts of honeydew throughout the year. It settles mainly on the lower leaf surface. The scale overwinters as egg, 1st and
2nd instar nymph and adult and completes several overlapping generations every year. The life cycle was estimated to last
in nature ~52 days during winter and 29–33 days during summer. Infestation density ranged between 0.3 and 2.8 live scales
per cm2 of leaf surface. Metaphycus helvolus was the only wasp found to parasitize P. pyriformis. Parasitism rate reached 31.2% during the second year of the study. The scale was able to resist parasitization by encapsulating
the parasitoid’s eggs. Maximum encapsulation rate was estimated up to 23% of the adult scales. Encapsulated eggs ranged from
1 to 5 eggs per adult scale. Predation rate reached 7% and it was attributed to the coccinellid Chilocorus bipustulatus. The above information could be important for planning a sustainable control strategy for this new pest in Greece. 相似文献
16.
通过系统观察,香荚兰根腐病周年发生,随种植时间延长而病情累积增高。新增病根发病率增高在高温季节,而在低温干旱季节降低。根腐病发病率＜５０％的调查样方有１９．７％的表现出蔓叶发黄;发病率＞６０％的,则有９０％以上的蔓叶发黄,可以把发病率＜４０％作为该病的控制指标。田间管理好,根系发达,生长良好的园地,病情较轻。离体幼根接种试验表明,根尖和根毛区是病原主要的入侵部位。有１５％的幼根不感病,大多数感病根,病斑扩展到一定程度即停止活动,仅有１２％的根病斑发展到全根死亡。病斑扩展期为２～７ｄ,扩展速度为０．２～８．４ｍｍ／ｄ。 相似文献
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Growth of a single sugi (Cryptomeria japonica (L.f.) D. Don.) tree was analyzed on the basis of a dry matter budget. The aboveground net production rate and death rate were defined as the anabolic rate and catabolic rate, respectively. Growth rate of aboveground tree weight, v(w) (kg(dw) year(-1)), was defined as follows: v(w) = v(p) - v(d) (1) where v(p) (kg(dw) year(-1)) is the aboveground net production rate and v(d) (kg(dw) year(-1)) is the aboveground death rate. The value of v(d) is obtained by measuring the monthly clippings of new dead leaves and branches attached to a sample tree. The value of v(w) was calculated as the annual difference in the estimated aboveground tree weight, w(T) (kg(dw)). Finally, the value of v(p) was estimated as the sum of the values of v(d) and v(w). The following allometric relationships were found between v(p) and w(T) and between v(d) and w(T): v(p) = aw(T) (alpha), v(d) = bw(T) (beta) (2). Combining Equations 1 and 2 gives a growth equation, Bertalanffy's equation, of the sample tree. dw(T)/dt = v(w) = aw(T) (alpha) - bw(T) (beta) (3). Because the growth curve of w(T) was derived from Equation 3, the analysis of the growth of w(T) is based on direct measurement of the dry matter budget. 相似文献
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对天然茶秆竹采取不同垦复措施后的出笋数、成竹数、成竹率进行统计分析,结果表明:(1)不同年度的天然茶秆竹采取相同的垦复措施,垦复效果一年比一年好;(2)茶秆竹林采取不同的垦复措施效果不同:采取劈山+全锄+施肥处理,2a出笋数10995株·hm-2,比其它2种措施提高15 5%～16 0%。成竹数7455株·hm-2,提高20 5%～23 3%;成竹率67 8%,提高4%～5 9%,明显高于其它2种措施;(3)经过劈山+全锄处理的茶秆竹发笋个数和新竹株数与劈山处理的差异不明显。 相似文献