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Maize weevil damage survey on bagged apples

Only insect damage, and effective measures to improve fruit quality. Rapidly expanded in recent years, area has expanded each year. Zhaoyuan 1998 reached 200 million apple bagging. When the majority of farmers eager to increase production efficiency through when bagging apples, cover their home town of Daqing City outlet remote villages and towns move to find test village's farmers suffered as bagged apple beetle damage, economic losses. Through field research and in accordance with body color, elytra, beak-like features such as the Ministry,[link widoczny dla zalogowanych], initially considered as pest of maize, the relevant fact sheets below. 1 maize weevil infestation and the laws of the reasons Apple bagging corn as (Sitophil stone, loose soil and bark crevices in the winter. the few larvae in the food grain in the winter. egg 3 to 16 days, the larvae of 13 to 28 days, 54 to 311 days of adult life. usually completion of a generation to be 2l ~ 58 ��. 150 to 570 eggs a lifetime. adults and have good at climbing crawling habits, were frightened off Sizhuang; a trend study of temperature trends; sensitivity to light, hi the dark, including moving the event to the dark light is gathered. maize weevil infestation Bagged Apple orchard. are covered under a tree orchard grass straw. as wheat straw and wheat bran, there are many shells can be with the maize weevil eggs,[link widoczny dla zalogowanych], larvae and adults, and the straw,[link widoczny dla zalogowanych], if the grain for a long time does not decay, there is enough time to make peeling eggs hatch and the larvae, pupation and emergence. in the Shandong area, occurred in 2 of maize as a generation, March 1st generation,[link widoczny dla zalogowanych], 2nd generation in July. infestation bagging apples is 2 on behalf of the maize weevil adults. is because adults have the climbing trend of corn as temperature, humidity and photophobia hi increasingly dark and other habits, so the bagged fruit vulnerable to damage. 2 killed bagged fruit damage rate of 2.1 cases, home town of Daqing outlet Village Pang Zhendong bagging 10,000 Fuji apple orchard, random survey of 212 solution bags, insect feeding fruit 54 by a 1O 25.5% damage rate of a Wu Guoming. recruit urban village test test made apple victims cloud rate was 23.4%. 2,2 Apple killing insects like fruit injury in the survey had more than 5O, up to 273, leaving it pockmarked face-like fruit; wound largest 3mm2, the smallest 1mm; insect population Deep 2 ~ 4ram ; early infestation of fruit (7 months late) the rapid expansion of the fruit is still to late August (August 25) survey, the entire fruit shape were irregular; worm wound due to prolonged water loss, the formation of depression round spot, flesh browning in spots, hot up to 0.7cm. 2.3 damage during the early apple bagging is June to early July. infestation of corn into the bag as the period in mid-July to mid August; August 25 day investigation, the victim fruit insects live most of the transfer bags, empty bags of 88%; 12% of damaged bags. which includes bags of 4% of the insects, dead insects bags B%. If the surface of fresh insect feeding 2% In late August shows no damage after the maize weevil bagging apples. 3 corn as damage control measures bagged apple has a strong hidden, if not promptly identified and measures will suffer serious economic losses. major may take the following measures. �� conditions should be covered orchard alfalfa, clover, Amorpha fruticosa and so on. as shall be suppressed when the grass with the threshing of wheat straw with the straw. to avoid the Insect. �� orchard grass straw when the pressure point pressure to use land to facilitate decay. watering or rainfall Sprinkle a small amount of fertilizer the grass in the straw, in order to facilitate the rotting grass and maize as the drive out. �� began to notice since early July, as the case of corn orchard activities, such as found on the ground and the maize weevil trunk crawling, timely spraying of dichlorvos 80% or 800 to 1000 times Chlorpyrifos 48% from 1200 to 1500 times, and other insecticides to kill adult Jing. Once inside the fruit bags would be difficult to control. Upon closing the text on 1998-09-29 to
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