-
Detailed Guide to the Prevention and Control of Major Pests of Lychee and Longan
I. Pests More than 50 species of pests have been found on lychee and longan, among which the most common and serious ones are the lychee stink bug, the lychee fruit borer, the lychee tip moth, the longan Heliothrips moth, and the longan angular leaf psyllid, 5 species in total. The first 4 of these attack both lychee and longan, while the angular leaf psyllid attacks only longan. In our province, the lychee stink bug and the lychee fruit borer cause the most serious damage to lychee and longan.
-
Act quickly to prevent and control diseases in eggplant, melon and bitter gourd
New leaves become smaller, narrow and elongated, shrunken, hardened and distorted; diseased plants are obviously stunted and find it hard to set fruit; even if fruit is set, it is deformed and hardened with a mottled surface.%26rdquo; Recently, a farmer brought a diseased bitter gourd vine and anxiously went to the municipal plant protection station for consultation and told this author about it, asking what disease it was and seeking a solution...
-
What to Do About Spindly Overgrowth in Greenhouse Beans? Detailed Analysis of Causes and Control Methods
The causes of spindly overgrowth in summer vegetables differ at each stage. Practice has proven that greenhouse beans are most prone to spindly overgrowth during the summer, and the main causes can be grouped into two major categories: 1. Seedling-stage overgrowth. The main cause of spindly overgrowth in seedlings is excessively high temperature, especially when nighttime temperatures are too high and respiration consumes too much...
-
How to control the longan eriophyid mite? Detailed control methods
Damage situation: It pierces and sucks sap in the terminal buds of new longan shoots and in flower clusters, causing the internodes of the flower clusters to shorten, and the florets cannot open normally and develop into swollen flower clusters that do not fall off for a long time. Fruit growers in Guangdong commonly call them "ghost flowers"; damaged new shoots become bow-shaped and claw-like, with leaf margins curling inward and unable to unfold, which growers call ghost shoots. In particular, ghost flowers cannot set fruit...
-
How to prevent and control diseases of yardlong beans? A detailed guide to practical methods
I. Main symptoms The yardlong bean can be infected by pathogens throughout its entire growing season, but its resistance weakens and susceptibility increases from the beginning of flowering to the fruiting period. The disease mainly attacks the leaves; in the early stage of the disease, chlorotic yellow-white spots appear on the leaves, and the spots gradually increase until they densely cover the entire leaf. The plant is short and stunted, with few and small pods, and its growth...
-
What are the control methods for the bean pod borer?
The bean pod borer, also called the cowpea pod borer, is one of the main pests of beans. The adult cowpea pod borer is dispersed and hidden, flies over a wide range to lay eggs, and lays many eggs, so it is not easy to kill or trap by spraying. Adults lay eggs on the tender leaves of the plant, and after about 5--7 days they hatch and bore into the pods to feed on the beans. Larvae over 3rd instar bore into the pods, and spraying...
-
Three key pests to focus on controlling when growing cowpeas
The vigorous growth period of long cowpeas falls in a season of high temperatures and abundant rain, so pests and diseases occur severely. If management cannot keep up, it easily leads to reduced quality and lower yields. In terms of control measures, agricultural control should be the main approach, with chemical control as a supplement, to ensure the quality and safety of the product. 1. Rust disease occurs in August to September, mainly...
-
How to identify and control common diseases and pests of winter melon?
Spring-planted winter melon is rich in nutrients; every 100 grams of fresh melon contains 96.6 grams of water, 0.4 grams of protein, 19 mg of calcium, 12 mg of phosphorus, 18 mg of vitamin C and other nutrients. In recent years, demand for winter melon has been increasing in various places. Spring-planted winter melon has high yields, and some varieties can reach up to 10,000 kg, after...
-
There are many local varieties of winter melon, and pest and disease control needs to be strengthened
Winter melon has high yields and is widely cultivated in our country. Every year when the autumn harvest peak arrives, prices often plummet. If farmers use their existing conditions to store winter melon for extended preservation, they can both extend the sales and supply period of winter melon and increase economic benefits, making it worth promoting and applying. 1. Suitable storage conditions and preparation before storage: Winter melon likes...
-
How to prevent and control angular leaf spot of winter melon? First, recognize the disease symptoms
Symptoms: It mainly affects leaves, petioles, and fruit. It can be affected from the seedling stage to the mature plant stage. When true leaves are infected, bright green water-soaked spots appear first, gradually turning light brown; the lesions are restricted by leaf veins and become polygonal, yellow-brown, and when humidity is high, milky white cloudy water-drop-like bacterial ooze exudes from the underside of the leaves, and the diseased tissue is brittle and easily perforated. When stems and petioles are infected, ...
条件筛选