 Wysłany: Śro 3:34, 02 Lut 2011 Temat postu: p90x workout calendar Persimmon harm cotton Kuwana |
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| Persimmon harm cotton Kuwana and Controlling Techniques
Persimmon draw shoot buds, stems and fruit juice, persimmon trees delayed germination, growth and development of persimmon, sitting flower,p90x workout calendar, fruit. In particular 2 or 3 generations nymphs, female to harm the fruit-based, and will seriously affect fruit quality, lower fruit quality, will result in total destruction of whole trees and even death. 3 Persimmon cotton Kuwana occurrence and relationship to the environment 3.1 The size of persimmon cotton Kuwana reproduction period and the occurrence of parasite location due to vary according to the survey, the first generation of females lay eggs an average of 1 120 150; 2 on behalf of the 260; parasitic eggs in the fruit on the average 329, parasitic on the leaves for the 160; parasites in the trunk, branches on the 150. To parasitic eggs on the fruit more, fewer overwintering eggs, the first Received :2004-09-29; Revised :2004-12-20 Author: Zhou Yongmin (1970), male, Anhui Pro Quan, Assistant Engineer,ugg boots sale, college graduate, is mainly engaged in the promotion of forestry technology. 2 Zhou Yongmin: Persimmon Sponge Crab hazards and prevention techniques 352 on behalf of the characteristics of spawning more than the first generation 1. 3.2 Kuwana temperature on cotton growth and development of persimmon, the survival rate and activities such as a significant influence in the egg stage when 17 ~ 18 �� 21d, at 30 ~ 32 �� when the only 12d, high temperature also directly affects the survival rate of parasitic nymph , parasitic nymph optimum temperature for growth and development in the 28 ~ 32 ��, was the most active against the most serious. 3.3 The size and persimmon moisture cotton emergence relationship between male Kuwana very humid weather very closely, very few male adult emergence. Generally 45% to 60% humidity range, the eggs can hatch properly. When the humidity close to saturation, can not be drilled nymphs hatched egg sac, or even death. Emergence of newly hatched nymph period, often rainy weather, it stays in the oocysts, pending the storm, quickly spread out activities. Wind and rain are the main communication medium of persimmon cotton Kuwana. 3.4 species, age, growth, and so affect the composition of persimmon trees asbestos and the occurrence and development Kuwana harmful levels of asbestos Kuwana persimmon significant selectivity of the host. Linquan hazards of the most important tribute persimmon; persimmon, lotus persimmon, mirror persimmon, persimmon yellow followed. Heavy damage to the prime age. Growing to flourish, fruit juice, thin persimmon varieties occur more; the same persimmon, the middle parasitic more, upper and lower parasitic less. 4 4.1 Control of the natural enemies of biological control of persimmon red cotton Kuwana point lip ladybug, Chinese pallens, Coccinella septempunctata and so on. Conditions by stocking natural enemies to suppress the occurrence of persimmon and control of cotton Kuwana Kuwana persimmon number of cotton, to control cotton Kuwana purposes. 4.2 Chemical control (1) early winter period, in the trunk of the tree trunk on a white-or spray of lime sulfur 3 to 5 degrees and 50% or 45% monocrotophos, methamidophos,uggs boots italia, 800 ~ 1000 times, spray when need to add the right amount of neutral detergent, to enhance adhesion. It was observed that a single application of organic phosphorus pesticide difficult to eradicate this pest, and after being sprayed in the spraying 4.5% 7d 1000 times insecticide cypermethrin good special effects. In addition, adult kaki cotton Kuwana Sheng period or incubation period can be 100 times spraying diesel oil emulsion, or 90% trichlorfon 1000 times control, can achieve better results. If using 50% of parathion EC 2000 times, or 50% EC 1500 Marathon liquid control,ghd glätteisen, the effect is better, also apply to large areas of control. (2) L with a dozen larvae, or drills in the trunk and the trunk base was more than 30. Angle of 2 to 3 dozen different directions larvae L (larvae L Deep 2 ~ 4cm), and above it hung a stock solution containing 45% monocrotophos bottles, and two thick cotton core out into the bottom of the bottle were and larvae L cave, liquid core slowly lost through the cotton to the plant body (in larvae L drug for the degree of overflow hole), then sealed with mud. Or veterinary suction syringe full of liquid input into the hole, seal with varnish, pressure injection of liquid, immediately sealed with tape. This method is suitable for tall trees in the prevention and treatment, should be adult or egg Sheng incubation period of implementation. (3), scrape around the base of the trunk bark (phloem to the degree does not hurt), and then suck the drugs such as organic phosphorus omethoate, methamidophos, monocrotophos and other diluted 10 times with toilet paper or cotton fibers soaked affixed Guapi trunk, and a good lashing. Apply in spring or summer time to thrive persimmon season is better, sleep on the sap does not flow, application invalid. Note that the time applied to fruit picking on the 60d from above, otherwise the large amount of pesticide residues in fruits, fruit quality damage. 4.3 silvicultural measures to be seriously harmed, the density is too large orchard, it is timely thinning, pruning, so that air and light. Appropriate replanting within the open space in the Shiyuan other excellent varieties of resistance to pests in persimmon trees; with timely removal of the host worm pruning branches, shipped outside the park burned. In addition,p90x workout schedule, when transporting seedlings to strict quarantine to prevent its spreading. More articles related to topics： ghd deutschland Large-season cultivation technique UGG Boots Outlet The practice of foster children e columbia sportswear outlet A-share IPO under the N |
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