According to the near future investigation looks, the part is field the bull rate that causes because of cotton thrips harm is higher, local cotton field nods a bull rate to be able to amount to 7-10% , thrips of partial cotton field causes knit Xiepoxie not little also. The netizen let tell the thrips that tell cotton recently knowledge of a few technologies, here talks about a few views with respect to the cotton thrips circumstance since this year.
One, the formation that cotton thrips endangers cotton to cause the silver-colored spot, bull, symptom that knit a leaf
Cotton thrips spends cotyledon period to begin ingoing cotton field from cotton, after taking the land, the imago of cotton thrips or nymph are centered at the tender head of cotton individual plant and file of cotton leaf the reverse side to suck juice more. After pily lamina be murdered, after foliaceous the reverse side pours out of juice, traumatic face forms silvery white film after the injury more, form argent blob. After pily true leaf grows, top heart tender head suffers injury of cotton thrips file easily, harm period is formed earlier " fair cotton " or " the cotton that do not have a head " , and cause be short of a seedling to break ridge in a field, some closer year this kind of circumstance is scarce. Pily 1-2 piece true Xie Jimian carries a heart on the head to suffer cotton thrips file to hurt, cotton is easy form bull become divided, growing point grows many forked much branch, form " bull cotton " or " medicinal powder headdress flower " , bell of knot of general bull cotton is little, bear period defer, easy gloomy of the later period in forming cotton is my, suggest as soon as possible pulls out.
2, why is cotton thrips endangered the meeting is so serious
Period of beginning of spring slanted this year in March early, the last ten-day of a month warmed up in March fast, early spring imago or nymph are active in green garlic ground, bug mouth amount is large. 4 in after air temperature of the last ten-day of a month warms up, cotton thrips begins to be on host of move to a better place or have a promotion activity, the florescence such as fireweed of edge of come across ground or fruiter encounters, produce hyperplasia to cotton thrips very advantageous, cause thrips of cotton field cotton to produce base to increase.
Since this year April, frequency of strong, wind mixes fresh gale the weather that wait is helpful for microtherm cotton thrips harm. Ceng Fawen of day hill plant protection has been told, a particular year of disaster caused by a windstorm of frequency of early spring wind, cotton thrips harm often is secondary calamity, if was mixed 2014 the influence of windy 2017 weather, smoke thrips is planted in cotton field group of amount wave motion are bigger. But slant as a result of wind frequency or field humidity this year big, field cannot accomplish prophylaxis and treatment of seasonable gush drug, this created a condition with respect to harm of thrips giving cotton, when discovery cotton individual plant knits leaf and bull in great quantities, prevention and cure is late already. Stand by fireweed of course much or thrips of orchard ground cotton happens heavy.
3, the proposal that current cotton thrips endangers
1. union is field weed, as soon as possible pulls out " bull cotton " .
When 2. cotton gives birth to Yo period to be on 4 true Xie Yi, cotton field does not need reoccupy pesticide prophylaxis and treatment.
3.The basis is investigated and measure newspaper situation, prevention and cure of as soon as possible is field cotton thrips. It is to eradicate field edge fireweed, 2 it is in cotton young plant neat seedling stage comes 4 true leaves period, as soon as possible uses the nicotine such as Bi bug Lin or Ding bug amidine kind pesticide prevents and cure, also can accuse to undertake together with Qi Miao.
Character, hard to avoid is extreme with inadequacy, ask take into consideration the circumstances to consult, if disagree,ask with the proposal communication leaves a message after article.
