These days received a few fruit farmers consultation, citrus is the expansion period, but the fruit drop is serious, can not find the cause, I watched the small video taken, determined that it is caused by small flies. This is not an isolated case, many growers have reported this situation, small fruit flies may occur in local areas this year.
The citrus fly, commonly known as needle and maggot, is a devastating pest that harms a variety of fruit trees and is known as the number one killer of fruits. Therefore, for the citrus small fruit fly, we citrus people must have a very good understanding, just in case.
<h1 class="pgc-h-arrow-right" data-track="19" > the life habits of the citrus fly</h1>
3 to 5 generations occur in 1 year, there is no strict overwintering phenomenon, and it is extremely uneven. It occurs more often in The citrus producing areas of Guangdong from July to August, and its habits are similar.
<h1 class="pgc-h-arrow-right" data-track="18" > morphological characteristics of the citrus fruit fly</h1>
Ovate prismatic, milky white. The larvae are maggot-shaped and yellowish-white when ripe. Pupae are oval in shape and pale yellow. Adults are all dark black and yellow.
<h1 class="pgc-h-arrow-right" data-track="17" > the distribution and symptoms of pest in citrus flies</h1>
The pest is a quarantine pest at home and abroad, and is harmful in citrus-producing areas such as Guangdong, Guangxi, Fujian, Hunan and Taiwan. The pest host is more complex, in addition to harming citrus, it also harms peaches, plums, loquats and so on. Adults lay eggs in the host fruit, and the larvae incubate the pulp.
<h1 class="pgc-h-arrow-right" data-track="8" > control method for citrus fruit flies</h1>
1. Strict quarantine system to prevent importation.
It is strictly forbidden to transfer seedlings, scion and fruit from harmful insect areas.
2. Pharmaceutical prevention and treatment.
Under the premise of doing a good job of insect investigation, adult insects spray 90% crystal enemy insect 800 times liquid or 20% Chinese and Western killing parathrin emulsion 2000 to 2500 times liquid, or 20% extermination emulsion 2000 ~ 2500 times liquid mixed with 3% brown sugar water mixture in the early stage of egg laying, trap adult insects, spray 1/3 of the tree each time, spray 1/3 of the canopy per tree, once every 4 to 5 days, 3 to 4 times in a row, in case of heavy rain, adult worms will die in large numbers of adults 2 to 3 hours after spraying.
3. Artificial prevention and control.
During the period of pest fruit, joint prevention is organized, and fruit farmers are mobilized to remove pest fruits, bury them deeply, burn them or boil them.