• Glasshouse potato aphid

  the form of yellow patches. Heavy yellowing may even be followed by defoliation. Life cycle Glasshouse potato aphid Aphids have a complex life cycle, with [...] (winter eggs are produced) lifecycles. There is no alternation of hosts, and the two types of life cycles occur on the same host plant. The aphid can overwinter [...] aphid ( Aulacorthum solani) is a native European species of aphids , seriously affecting crops of sweet pepper in particular. These aphids further affect

• Tea mosquito bug

  leaves, tender stems and buds. The toxic saliva of the insect is injected to the plant tissues at the time of feeding causes reddish brown patches. As a result [...] die, curling of leaves, badly deformed and eventually fall off. The infested shoot also shows same such spots and subsequently drying of the shoots. Severely [...] and greenish brown wings. Females is capable of laying about 500 eggs. The eggs are laid in all tender parts of the plant. The freshly hatched nymphs are

• Fusarium wilt

  Fusarium oxysporum life cycle, is similar to that of most Fusarium species. Fusarium overwinters for many years in the soil and on crop residues of infected plants [...] General Fusarium is a group of soil-borne fungi with many different species. Fusarium is widespread and can infect a range of host crops. Many species are [...] yellow and wilt, mostly on one side of the plant. Finally, the whole plant wilts. Other symptoms are brown discolouration of the xylem vessels which can be

• Asian citrus psyllid

  and there is no known cure. Life cycle of Asian citrus psyllid Adult Asian citrus psyllids are mottled brown wings insects of about 25 to 35 mm long. The [...] psyllid, ( Diaphorina citri ), is an important pest of citrus in several countries as it is a vector of a serious citrus disease called greening disease or [...] responsible for the destruction of several citrus industries in Asia and Africa. In North America, it has spread through most of the southern states and Mexico

• Grape mealy bug

  and grape bunches. Malformation of leaves and shoot tips due to infestation of growing points. Honey dew secretion of mealy bugs support sooty mould growth [...] bunches are not suitable for making raisins. Life cycle and appearance Mealy bugs are found in crevices of stem, on leaves and berries. Mealy bugs are pinkish [...] Mealy bug completes its life cycle in 30 days. Ants are get attracted to honey dew secreted by mealy bug and helps in spreading of mealy bugs.

• Pink Bollworm

  all cotton growing regions of the world. Damage symptoms Shredding of buds due to infestation of flower buds. Formation of rosette flower owing to flower [...] plugged with excreta of the insect which are feeding inside the boll. Reduction of lint development, discolouration, and destruction of seed. Premature drop [...] immature bolls. Premature opened bolls attract saprophytic fungi to grow in it. Life cycle and appearance Pink bollworm lays eggs all over the cotton plant,

• Black root rot of cucurbits

  exudations of spores. In the early stages of wilting it is hard to distinguish from other wilt diseases. The fungus can also cause black fruit rot. Life cycle [...] about the life cycle. The fungus is dispersed by water, air and soil particles. How to prevent Black root rot of cucurbits Test for the presence of Phomopsis [...] lesions are slightly sunken and are mostly formed around the point of attachment of lateral roots and root hairs. The lesions may grow and encircle the

• Rose aphid

  sooty moulds develop. Life cycle and appearance of Rose aphid Aphids have a complex life cycle, with both winged and wingless forms of adults and a great [...] abundant pest of roses. It is virtually cosmopolitan and widely spread in Europe. Damage symptoms Infestations with rose aphids retard the growth of buds and [...] with unfertilized viviparous females continuing to produce new generations of females. Aphids moult four times before reaching adulthood. With each moult

• Fusarium head blight or scab

  General Fusarium is a group of soil-borne fungi with many different species. Fusarium is widespread and can infect a range of host crops. Many species are [...] as wheat (fusarium head blight wheat) and post-harvest decay. Life cycle and appearance of Fusarium head blight or scab Most Fusarium species only make [...] most Fusarium specieshave a similar life cycle. Fusarium overwinters for many years in the soil and on crop residues of infected plants as chlamydospores

• Aphids

  ornamental crops, e.g. begonia. Aphids life cycle Aphids have a complex life cycle, with both winged and wingless forms of adults of the same species [...] aphids have two pairs of wings, one of which is much larger than the other. For a large part of the season an aphid population consists of viviparous females [...] generations of females. This is known as an anholocyclic (incomplete) life cycle. However, in some greenhouse crops with very low winter temperatures (e.g. s