Whitefly

insects, they belong to the division Sternorrhyncha. The whiteflies form the family Aleyrodidae. The most common species are the greenhouse whitefly , [...] consequences: If the population is very large, feeding on plant sap can affect the physiology of the plant, as a result of which growth is retarded. In full sunlight [...] your crop Life cycle of whitefly Whitefly damage The larvae need a lot of nutrients for growth, and thus consume a large quantity of plant sap. This contains

Tobacco aphid

also capable of dispersing through the crop by walking. The tobacco aphid tends to form denser colonies, closer to the top of the plant, than the peach potato [...] on the abdomen and several transverse black bands across the body. The antennae are 0.7-1.0 times the body length, reaching to the siphunculi. The body [...] from the plant and disturb the balance of growth hormones. As a result, the plant’s growth is retarded giving rise to deformed leaves or, if the infestation

Flies

both directly and indirectly. The type of damage depends on the species of the flies. Direct damage is the immediate result of larvae feeding on root hairs [...] nuisance, are particularly small flies of the families Sciaridae ( sciarid flies ) and Ephydridae (shore flies). The larvae of these insects generally live on [...] their large number. Larvae of flies of the family Keroplatidae (mainly Lyprauta sp.) can cause damage in potted orchids. The Spotted Wing Drosophila has

Cryptolaemus montrouzieri

species such as the citrus mealybug and the long-tailed mealybug . The predatory beetle Cryptolaemus montrouzieri is used for the control of the following pests: [...] large populations of mealybugs. Once the supply of mealybugs becomes inadequate, the ladybirds fly off in search of new prey. Sometimes the larvae resort to [...] temperature of 21°C, during the whole period of its development to adult beetle, a larva eats more than 25 second and third instar mealybug nymphs. The larvae

Leaf miners

before the harvest is affected. The size of a leaf tunnel depends on the stage of development of the leaf, the species of host plant and the species of leaf [...] Leaf miners What are leaf miners? Leaf miners belong to the order Diptera (the true flies ) and form the family Agromyzidae. This is a family of small flies [...] tunnel into the leaves of plants, creating ‘mines’. There are many species of leaf miner affecting various crops in temperate parts of the world. Under

California red scale

t. The females moult into the grey stage, named after the colour of the edges of their shield. Mating occurs at the start of this stage, before the female [...] humans and their tools. In the hours after birth, they disperse over the tree in search of a source of food. When attracted by the light (positive phototaxis) [...] tissue and sucking the contents of the parenchymal cells. If the infestation is more serious, the leaves present some characteristic yellow dots around

Laeveld_Agrochem_GROEI_20_-_Winter_2022.pdf

ejected by the GC are released onto the antenna of the insect which is coupled to an apparatus measuring the voltage output of the antenna. If the antenna [...] Independence. The structure of both these varieties is the highest priority in years one through four. The structure is the base for the rest of the tree’s (and [...] Starch What are carbohydrates? Carbohydrates are the product of photosynthesis, the process where the leaves of trees produce soluble sugar in the form of

Tobacco whitefly

peppers, yellowing of the flower stalks in gerbera, and serious yellowing of the leaves of French beans. Other symptoms include the appearance of chlorotic patches [...] adult. The larvae are found on the underside of young leaves and have an oval shape. The first instar larvae (crawlers) are mobile, whereas the rest of the [...] distinctively, the wings of the tobacco whitefly ( Bemisia tabaci ) are held vertical and parallel along the body. Damage symptoms The larvae of whitefly need

Avocado

seed. The berry is green-skinned and fleshy and its shape resembles a pear or (large) egg. The avocado tree belongs to the flowering plant family of Lauraceae [...] About The avocado ( Persea americana ), also named ‘alligator pear’ is a tree originating in South Central Mexico. Its nick name points to its fruit which [...] Lauraceae . Commercially speaking, avocados are very valuable and the fruit is produced in tropical and Mediterranean regions. Avocados ripen only after they

Phytoseiulus persimilis

on spider mites. The quantity of prey consumed depends on the predator and prey populations, the sex and age of the predator, and the temperature and relative [...] larvae or eggs per day. Because the development rate of the predatory mite is roughly twice that of the spider mite, the number of predatory mites increases [...] use Push the centre of the cap to open the dosage hole Sprinkle material on leaves or pour into Diboxes Make sure the material remains on the introduction